- Using Ethernet Operations Administration and Maintenance
- Configuring Ethernet Connectivity Fault Management in a Service Provider Network
- CFM CCM Extensions to Support the NSN Microwave 1+1 Hot Standby Protocol
- Configuring Ethernet CFM for the Cisco ASR 1000 Router
- Configuring Ethernet Virtual Connections on the Cisco ASR 1000 Series Router
- Using the IEEE 802.3ad Link Aggregation MIB
- Configuring IEEE 802.3ad Link Bundling
- ITU-T Y.1731 Performance Monitoring in a Service Provider Network
- ICCP Multichassis VLAN Redundancy
- Trunk EFP Support
- ITU-T G.8032 Ethernet Ring Protection Switching
- Layer 2 Access Control Lists on EVCs
- Configuring MAC Address Limiting on Service Instances Bridge Domains and EVC Port Channels
- Configuring Ethernet Local Management Interface at a Provider Edge
- Using Link Layer Discovery Protocol in Multivendor Networks
- Configuring ITU-T Y.1731 Fault Management Functions in IEEE CFM
- G.8032 and CFM Support for Microwave Adaptive Bandwidth
- Configuring IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations
- IPSLA Y1731 On-Demand and Concurrent Operations
- VXLAN-MCLAG Active-Active High Availability Support
- Cisco ASR 1000 VxLAN Support
- Prerequisites for Configuring Ethernet CFM in a Service Provider Network
- Restrictions for Configuring Ethernet CFM in a Service Provider Network
- Information About Configuring Ethernet CFM in a Service Provider Network
- How to Set Up Ethernet CFM in a Service Provider Network
- Designing CFM Domains
- Configuring Ethernet CFM
- Provisioning the Network
- Provisioning the Network on the CE-A
- Provisioning the Network on the U-PE A
- Provisioning the Network on the PE-AGG A
- Provisioning the Network on the N-PE A
- Provisioning the Network on the CE-B
- Provisioning the Network on the U-PE B
- Provisioning the Network on the PE-AGG B
- Provisioning the Network on the N-PE B
- Provisioning Service
- Configuring and Enabling the Cross-Check Function
- Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-A
- Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-B
- Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-A
- Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-B
- Configuring CFM over Bridge Domains
- Troubleshooting Tips
- Provisioning the Network
- Configuring Ethernet OAM Interaction with CFM
Configuring Ethernet Connectivity Fault Management in a Service Provider Network
Ethernet Connectivity Fault Management (CFM) is an end-to-end per-service-instance Ethernet layer operations, administration, and maintenance (OAM) protocol. It includes proactive connectivity monitoring, fault verification, and fault isolation for large Ethernet metropolitan-area networks (MANs) and WANs.
The advent of Ethernet as a MAN and WAN technology imposes a new set of OAM requirements on Ethernet’s traditional operations, which were centered on enterprise networks only. The expansion of Ethernet technology into the domain of service providers, where networks are substantially larger and more complex than enterprise networks and the user base is wider, makes operational management of link uptime crucial. More importantly, the timeliness in isolating and responding to a failure becomes mandatory for normal day-to-day operations, and OAM translates directly to the competitiveness of the service provider.
 Note | As an alternative, CFM can be configured over an Ethernet flow point (EFP) interface by using the cross connect functionality. For more information about this alternative, see Configuring the CFM over EFP Interface with Cross Connect Feature. |
- Prerequisites for Configuring Ethernet CFM in a Service Provider Network
- Restrictions for Configuring Ethernet CFM in a Service Provider Network
- Information About Configuring Ethernet CFM in a Service Provider Network
- How to Set Up Ethernet CFM in a Service Provider Network
- Configuration Examples for Configuring Ethernet CFM in a Service Provider Network
- Glossary
Prerequisites for Configuring Ethernet CFM in a Service Provider Network
Business Requirements
Restrictions for Configuring Ethernet CFM in a Service Provider Network
-
CFM loopback messages will not be confined within a maintenance domain according to their maintenance level. The impact of not having CFM loopback messages confined to their maintenance levels occurs at these levels: - Architecture—CFM layering is violated for loopback messages.
- Deployment—A user may potentially misconfigure a network and have loopback messages succeed.
- Security—A malicious device that recognizes devices’ MAC addresses and levels may potentially explore a network topology that should be transparent.
-
CFM is not fully supported on a Multiprotocol Label Switching (MPLS) provider edge (PE) device. There is no interaction between CFM and an Ethernet over MPLS (EoMPLS) pseudowire.
-
CFM configuration is not supported on an EtherChannel in FastEthernet Channel (FEC) mode.
Information About Configuring Ethernet CFM in a Service Provider Network
- Ethernet CFM
- Customer Service Instance
- Maintenance Domain
- Maintenance Point
- CFM Messages
- Cross-Check Function
- SNMP Traps
- Ethernet CFM and Ethernet OAM Interaction
- HA Features Supported by CFM
- NSF SSO Support in CFM 802.1ag 1.0d
- ISSU Support in CFM 802.1ag 1.0d
Ethernet CFM
Ethernet CFM is an end-to-end per-service-instance Ethernet layer OAM protocol that includes proactive connectivity monitoring, fault verification, and fault isolation. End to end can be PE to PE or CE to CE. A service can be identified as a service provider VLAN (S-VLAN) or an EVC service.
Being an end-to-end technology is the distinction between CFM and other metro-Ethernet OAM protocols. For example, MPLS, ATM, and SONET OAM help in debugging Ethernet wires but are not always end-to-end. 802.3ah OAM is a single-hop and per-physical-wire protocol. It is not end to end or service aware.
Troubleshooting carrier networks offering Ethernet Layer 2 services is challenging. Customers contract with service providers for end-to-end Ethernet service and service providers may subcontract with operators to provide equipment and networks. Compared to enterprise networks, where Ethernet traditionally has been implemented, these constituent networks belong to distinct organizations or departments, are substantially larger and more complex, and have a wider user base. Ethernet CFM provides a competitive advantage to service providers for which the operational management of link uptime and timeliness in isolating and responding to failures is crucial to daily operations.
Benefits of Ethernet CFM
End-to-end service-level OAM technology
Reduced operating expense for service provider Ethernet networks
Competitive advantage for service providers
Supports both distribution and access network environments with the outward facing MEPs enhancement
Customer Service Instance
A customer service instance is an Ethernet virtual connection (EVC), which is identified by an S-VLAN within an Ethernet island, and is identified by a globally unique service ID. A customer service instance can be point-to-point or multipoint-to-multipoint. The figure below shows two customer service instances. Service Instance Green is point to point; Service Instance Blue is multipoint to multipoint.
Maintenance Domain
A maintenance domain is a management space for the purpose of managing and administering a network. A domain is owned and operated by a single entity and defined by the set of ports internal to it and at its boundary. The figure below illustrates a typical maintenance domain.
A unique maintenance level in the range of 0 to 7 is assigned to each domain by a network administrator. Levels and domain names are useful for defining the hierarchical relationship that exists among domains. The hierarchical relationship of domains parallels the structure of customer, service provider, and operator. The larger the domain, the higher the level value. For example, a customer domain would be larger than an operator domain. The customer domain may have a maintenance level of 7 and the operator domain may have a maintenance level of 0. Typically, operators would have the smallest domains and customers the largest domains, with service provider domains between them in size. All levels of the hierarchy must operate together.
Domains should not intersect because intersecting would mean management by more than one entity, which is not allowed. Domains may nest or touch but when two domains nest, the outer domain must have a higher maintenance level than the domain nested within it. Nesting maintenance domains is useful in the business model where a service provider contracts with one or more operators to provide Ethernet service to a customer. Each operator would have its own maintenance domain and the service provider would define its domain—a superset of the operator domains. Furthermore, the customer has its own end-to-end domain which is in turn a superset of the service provider domain. Maintenance levels of various nesting domains should be communicated among the administering organizations. For example, one approach would be to have the service provider assign maintenance levels to operators.
CFM exchanges messages and performs operations on a per-domain basis. For example, running CFM at the operator level does not allow discovery of the network by the higher provider and customer levels.
Network designers decide on domains and configurations. The figure below illustrates a hierarchy of operator, service provider, and customer domains and also illustrates touching, intersecting, and nested domains.
Maintenance Point
A maintenance point is a demarcation point on an interface (port) that participates in CFM within a maintenance domain. Maintenance points on device ports act as filters that confine CFM frames within the bounds of a domain by dropping frames that do not belong to the correct level. Maintenance points must be explicitly configured on Cisco devices. Two classes of maintenance points exist, MEPs and MIPs.
Maintenance Endpoints
Maintenance endpoints (MEPs) have the following characteristics:
Per maintenance domain (level) and service (S-VLAN or EVC)
At the edge of a domain, define the boundary
Within the bounds of a maintenance domain, confine CFM messages
When configured to do so, proactively transmit Connectivity Fault Management (CFM) continuity check messages (CCMs)
At the request of an administrator, transmit traceroute and loopback messages
Inward Facing MEPs
Inward facing means the MEP communicates through the Bridge Relay function and uses the Bridge-Brain MAC address. An inward facing MEP performs the following functions:
Sends and receives CFM frames at its level through the relay function, not via the wire connected to the port on which the MEP is configured.
Drops all CFM frames at its level (or lower level) that come from the direction of the wire.
Processes all CFM frames at its level coming from the direction of the relay function.
Drops all CFM frames at a lower level coming from the direction of the relay function.
Transparently forwards all CFM frames at its level (or a higher level), independent of whether they come in from the relay function side or the wire side.
Note | A MEP of level L (where L is less than 7) requires a MIP of level M > L on the same port; hence, CFM frames at a level higher than the level of the MEP will be catalogued by this MIP. |
Outward Facing MEPs for Port Channels
Outward facing means that the MEP communicates through the wire. Outward facing MEPs can be configured on port channels (using cross connect functionality). A MIP configuration at a level higher than the level of the outward facing MEP is not required.
Outward facing MEPs on port channels use the Bridge-Brain MAC address of the first member link. When port channel members change, the identities of outward facing MEPs do not have to change.
An outward facing MEP performs the following functions:
Sends and receives CFM frames at its level via the wire connected to the port where the MEP is configured.
Drops all CFM frames at its level (or at a lower level) that come from the direction of the relay function.
Processes all CFM frames at its level coming from the direction of the wire.
Drops all CFM frames at a lower level coming from the direction of the wire.
Transparently forwards all CFM frames at levels higher than the level of the outward facing MEP, independent of whether they come in from the relay function side or the wire side.
If the port on which the outward MEP is configured is blocked by the Spanning-Tree Protocol, the MEP can still transmit and receive CFM messages via the wire.
Maintenance Intermediate Points
MIPs have the following characteristics:
Per maintenance domain (level) and for all S-VLANs enabled or allowed on a port.
Internal to a domain, not at the boundary.
CFM frames received from MEPs and other MIPs are cataloged and forwarded, using both the wire and the relay function.
All CFM frames at a lower level are stopped and dropped, independent of whether they originate from the wire or relay function.
All CFM frames at a higher level are forwarded, independent of whether they arrive from the wire or relay function.
Passive points respond only when triggered by CFM traceroute and loopback messages.
Bridge-Brain MAC addresses are used.
If the port on which a MIP is configured is blocked by Spanning-Tree Protocol, the MIP cannot receive CFM messages or relay them toward the relay function side. The MIP can, however, receive and respond to CFM messages from the wire.
A MIP has only one level associated with it and the command-line interface (CLI) does not allow you to configure a MIP for a domain that does not exist.
The figure below illustrates MEPs and MIPs at the operator, service provider, and customer levels.
CFM Messages
CFM uses standard Ethernet frames. CFM frames are distinguishable by EtherType and for multicast messages by MAC address. CFM frames are sourced, terminated, processed, and relayed by bridges. Routers can support only limited CFM functions.
Bridges that cannot interpret CFM messages forward them as normal data frames. All CFM messages are confined to a maintenance domain and to an S-VLAN (PE-VLAN or Provider-VLAN). Three types of messages are supported:
Continuity Check
Loopback
Traceroute
Continuity Check Messages
CFM CCMs are multicast heartbeat messages exchanged periodically among MEPs. They allow MEPs to discover other MEPs within a domain and allow MIPs to discover MEPs. CCMs are confined to a domain and S-VLAN.
CFM CCMs have the following characteristics:
Transmitted at a configurable periodic interval by MEPs. The interval can be from 10 seconds to 65535 seconds, the default is 30.
Contain a configurable hold-time value to indicate to the receiver the validity of the message. The default is 2.5 times the transmit interval.
Catalogued by MIPs at the same maintenance level.
Terminated by remote MEPs at the same maintenance level.
Unidirectional and do not solicit a response.
Carry the status of the port on which the MEP is configured.
Loopback Messages
CFM loopback messages are unicast frames that a MEP transmits, at the request of an administrator, to verify connectivity to a particular maintenance point. A reply to a loopback message indicates whether a destination is reachable but does not allow hop-by-hop discovery of the path. A loopback message is similar in concept to an Internet Control Message Protocol (ICMP) Echo (ping) message.
A CFM loopback message can be generated on demand using the CLI. The source of a loopback message must be a MEP; the destination may be a MEP or a MIP. CFM loopback messages are unicast; replies to loopback messages also are unicast. CFM loopback messages specify the destination MAC address, VLAN, and maintenance domain.
Traceroute Messages
CFM traceroute messages are multicast frames that a MEP transmits, at the request of an administrator, to track the path (hop-by-hop) to a destination MEP. They allow the transmitting node to discover vital connectivity data about the path, and allow the discovery of all MIPs along the path that belong to the same maintenance domain. For each visible MIP, traceroute messages indicate ingress action, relay action, and egress action. Traceroute messages are similar in concept to User Datagram Protocol (UDP) traceroute messages.
Traceroute messages include the destination MAC address, VLAN, and maintenance domain and they have Time To Live (TTL) to limit propagation within the network. They can be generated on demand using the CLI. Traceroute messages are multicast; reply messages are unicast.
Cross-Check Function
The cross-check function is a timer-driven post-provisioning service verification between dynamically discovered MEPs (via CCMs) and expected MEPs (via configuration) for a service. The cross-check function verifies that all endpoints of a multipoint or point-to-point service are operational. The function supports notifications when the service is operational; otherwise it provides alarms and notifications for unexpected endpoints or missing endpoints.
The cross-check function is performed one time. You must initiate the cross-check function from the CLI every time you want a service verification.
SNMP Traps
The support provided by the Cisco software implementation of CFM traps is Cisco proprietary information. MEPs generate two types of Simple Network Management Protocol (SNMP) traps, continuity check (CC) traps and cross-check traps.
CC Traps
MEP up—Sent when a new MEP is discovered, the status of a remote port changes, or connectivity from a previously discovered MEP is restored after interruption.
MEP down—Sent when a timeout or last gasp event occurs.
Cross-connect—Sent when a service ID does not match the VLAN.
Loop—Sent when a MEP receives its own CCMs.
Configuration error—Sent when a MEP receives a continuity check with an overlapping MPID.
Cross-Check Traps
Ethernet CFM and Ethernet OAM Interaction
To understand how CFM and OAM interact, you should understand the following concepts:
Ethernet Virtual Circuit
An EVC as defined by the Metro Ethernet Forum is a port-level point-to-point or multipoint-to-multipoint Layer 2 circuit. EVC status can be used by a CE device either to find an alternative path in to the service provider network or in some cases, to fall back to a backup path over Ethernet or over another alternative service such as ATM.
OAM Manager
The OAM manager is an infrastructure element that streamlines interaction between OAM protocols. The OAM manager requires two interworking OAM protocols, in this case Ethernet CFM and Ethernet OAM. Interaction is unidirectional from the OAM manager to the CFM protocol and the only information exchanged is the user network interface (UNI) port status. Additional port status values available include
REMOTE_EE—Remote excessive errors
LOCAL_EE—Local excessive errors
TEST—Either remote or local loopback
After CFM receives the port status, it communicates that status across the CFM domain.
CFM over Bridge Domains
Connectivity Fault Management (CFM) over bridge domains allows untagged CFM packets to be associated with a maintenance end point (MEP). An incoming untagged customer CFM packet has an EtherType of CFM and is mapped to an Ethernet virtual circuit (EVC) or bridge domain based on the encapsulation configured on the Ethernet flow point (EFP). The EFP is configured specifically to recognize these untagged packets.
An EFP is a logical demarcation point of an EVC on an interface and can be associated with a bridge domain. The VLAN ID is used to match and map traffic to the EFP. VLAN IDs have local significance per port similar to an ATM virtual circuit. CFM is supported on a bridge domain associated with an EFP. The association between the bridge domain and the EFP allows CFM to use the encapsulation on the EFP. All EFPs in the same bridge domain form a broadcast domain. The bridge domain ID determines the broadcast domain.
The distinction between a VLAN port and the EFP is the encapsulation. VLAN ports use a default dot1q encapsulation. For EFPs, untagged, single tagged, and double tagged encapsulation exists with dot1q and IEEE dot1ad EtherTypes. Different EFPs belonging to the same bridge domain can use different encapsulations.
Both up MEP, down MEP and MIP are supported. If an up MEP is configured under an EFP within a bridge domain, CFM messages would be routed into the bridge, and the rest members of the same bridge domain would be able to receive messages from this MEP. If a down MEP is configured, the messages will not goes into the bridge domain.
HA Features Supported by CFM
In access and service provider networks using Ethernet technology, High Availability (H)A is a requirement, especially on Ethernet OAM components that manage EVC connectivity. End-to-end connectivity status information is critical and must be maintained on a hot standby Route Switch Processor (RSP).
Note | A hot standby Route Switch Processor (RSP) has the same software image as the active RSP and supports synchronization of protocol and application state information between RSPs for supported features and protocols. |
End-to-end connectivity status is maintained on the customer edge (CE), provider edge (PE), and access aggregation PE (uPE) network nodes based on information received by protocols such as Connectivity Fault Management (CFM) and 802.3ah. This status information is used to either stop traffic or switch to backup paths when an EVC is down.
Every transaction involves either accessing or updating data among various databases. If the database is synchronized across active and standby modules, the modules are transparent to clients.
The Cisco infrastructure provides various component application program interfaces (APIs) that help to maintain a hot standby RSP. Metro Ethernet HA clients HA/ISSU, CFM HA/ISSU, and 802.3ah HA/ISSU interact with these components, update the database, and trigger necessary events to other components.
Benefits of CFM HA
Elimination of network downtime for Cisco software image upgrades, allowing for faster upgrades.
Elimination of resource scheduling challenges associated with planned outages and late night maintenance windows.
Accelerated deployment of new services and applications and facilitation of faster implementation of new features.
Reduced operating costs due to outages while delivering higher service levels.
CFM updates its databases and controls its own HA messaging and versioning, and this control facilitates maintenance.
CFM HA in a Metro Ethernet Network
A standalone Connectivity Fault Management (CFM) implementation does not have explicit high availability (HA) requirements. When CFM is implemented on a customer edge (CE) or provider edge (PE), CFM must maintain the Ethernet virtual circuit (EVC) state, which requires HA because the EVC state is critical in maintaining end-to-end connectivity. CFM configures the platform with maintenance level, domain, and maintenance point, learns the remote maintenance point information, and maps it to the appropriate EVC. CFM then aggregates data received from all remote ports; consequently HA requirements vary for CE and PE.
The CE receives the EVC ID, associated customer VLANs, UNI information, EVC state, and remote UNI ID and state from the MEN. The CE relies on the EVC state to send or stop traffic to the MEN.
The PE has EVC configuration and associated customer VLAN information and derives the EVC state and remote UNI from CFM.
Note | PEs and CEs running 802.3ah OAM must maintain the port state so peers are not affected by a switchover. This information is also sent to remote nodes in CFM CC messages. |
NSF SSO Support in CFM 802.1ag 1.0d
The redundancy configurations Stateful Switchover (SSO) and Nonstop Forwarding (NSF) are both supported in Ethernet Connectivity Fault Management (CFM) and are automatically enabled. A switchover from an active to a standby Route Switch Processor (RSP) occurs when the active RSP fails, is removed from the networking device, or is manually taken down for maintenance. NSF interoperates with the SSO feature to minimize network downtime following a switchover. The primary function of Cisco NSF is to continue forwarding IP packets following an RSP switchover.
For detailed information about SSO, see the “Configuring Stateful Switchover” module of the High Availability Configuration Guide. For detailed information about the NSF feature, see the “Configuring Cisco Nonstop Forwarding” module of the High Availability Configuration Guide.
ISSU Support in CFM 802.1ag 1.0d
In Service Upgrades (ISSUs) allow you to perform a Cisco software upgrade or downgrade without disrupting packet flow. Connectivity Fault Management (CFM) performs a bulk update and a runtime update of the continuity check database to the standby Route Switch Processor (RSP), including adding, deleting, or updating a row. This checkpoint data requires ISSU capability to transform messages from one release to another. All the components that perform active RSP to standby RSP updates using messages require ISSU support.
ISSU is automatically enabled in CFM and lowers the impact that planned maintenance activities have on network availability by allowing software changes while the system is in service. For detailed information about ISSU, see the “Performing an In Service Software Upgrade ” module of the High Availability Configuration Guide.
How to Set Up Ethernet CFM in a Service Provider Network
Designing CFM Domains
Note | To have an operator, service provider, or customer domain is optional. A network may have a single domain or multiple domains. The steps listed here show the sequence when all three types of domains will be assigned. |
Knowledge and understanding of the network topology.
Understanding of organizational entities involved in managing the network; for example, operators, service providers, network operations centers (NOCs), and customer service centers.
Understanding of the type and scale of services to be offered.
Agreement by all organizational entities on the responsibilities, roles, and restrictions for each organizational entity.
Determination of the number of maintenance domains in the network.
Determination of the nesting and disjoint maintenance domains.
Assignment of maintenance levels and names to domains based on agreement between the service provider and operator or operators.
Determination of whether the domain should be inward or outward.
1. Determine operator level MIPs.
2. Determine operator level MEPs.
3. Determine service provider MIPs.
4. Determine service provider MEPs.
5. Determine customer MIPs.
6. Determine customer MEPs.
DETAILED STEPS
Examples
The figure below shows an example of a network with a service provider and two operators, A and B. Three domains are to be established to map to each operator and the service provider. In this example, for simplicity we assume that the network uses Ethernet transport end to end. CFM, however, can be used with other transports.
What to Do Next
After you have defined the Ethernet CFM domains, configure Ethernet CFM functionality by first provisioning the network and then provisioning service.
Configuring Ethernet CFM
Configuring Ethernet CFM consists of the following tasks:
- Provisioning the Network
- Provisioning Service
- Configuring and Enabling the Cross-Check Function
- Configuring CFM over Bridge Domains
- Troubleshooting Tips
Provisioning the Network
- Provisioning the Network on the CE-A
- Provisioning the Network on the U-PE A
- Provisioning the Network on the PE-AGG A
- Provisioning the Network on the N-PE A
- Provisioning the Network on the CE-B
- Provisioning the Network on the U-PE B
- Provisioning the Network on the PE-AGG B
- Provisioning the Network on the N-PE B
Provisioning the Network on the CE-A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
snmp-server
enable
traps
ethernet
cfm
cc
[mep-up]
[mep-down]
[config]
[loop] [cross-connect]
15.
snmp-server
enable
traps
ethernet
cfm
crosscheck
[mep-unknown |
mep-missing |
service-up]
16.
end
DETAILED STEPS
Provisioning the Network on the U-PE A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mip
level {
level }
19.
exit
20.
exit
21.
snmp-server
enable
traps
ethernet
cfm
cc [mep-up] [mep-down] [config] [loop] [cross-connect]
22.
snmp-server
enable
traps
ethernet
cfm
crosscheck
[mep-unknown |
mep-missing |
service-up]
23.
end
DETAILED STEPS
Provisioning the Network on the PE-AGG A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [
interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
interface
type
number
12.
service
instance
id
ethernet [evc-name]
13.
encapsulation
encapsulation-type
14.
bridge-domain
bridge-id
15.
cfm
mip
level
level
16.
end
DETAILED STEPS
Provisioning the Network on the N-PE A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
ethernet
cfm
global
9.
ethernet
cfm
traceroute
cache
10.
ethernet
cfm
traceroute
cache
size
entries
11.
ethernet
cfm
traceroute
cache
hold-time
minutes
12.
interface
type
number
13.
service
instance
id
ethernet [evc-name]
14.
encapsulation
encapsulation-type
15.
bridge-domain
bridge-id
16.
cfm
mip
level
level
17.
exit
18.
exit
19.
snmp-server
enable
traps
ethernet
cfm
cc
[mep-up]
[mep-down]
[config]
[loop] [cross-connect]
20.
snmp-server
enable
traps
ethernet
cfm
crosscheck
[mep-unknown |
mep-missing |
service-up]
21.
end
DETAILED STEPS
Provisioning the Network on the CE-B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
snmp-server
enable
traps
ethernet
cfm
cc
[mep-up]
[mep-down]
[config]
[loop] [cross-connect]
15.
snmp-server
enable
traps
ethernet
cfm
crosscheck
[mep-unknown |
mep-missing |
service-up]
16.
end
DETAILED STEPS
Provisioning the Network on the U-PE B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mip
level
level
19.
exit
20.
exit
21.
snmp-server
enable
traps
ethernet
cfm
cc
[mep-up]
[mep-down]
[config]
[loop] [cross-connect]
22.
snmp-server
enable
traps
ethernet
cfm
crosscheck
[mep-unknown |
mep-missing |
service-up]
23.
end
DETAILED STEPS
Provisioning the Network on the PE-AGG B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
interface
type
number
12.
service
instance
id
ethernet [evc-name]
13.
encapsulation
encapsulation-type
14.
bridge-domain
bridge-id
15.
cfm
mip
level
level
16.
end
DETAILED STEPS
Provisioning the Network on the N-PE B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mip
level
level
19.
exit
20.
exit
21.
snmp-server
enable
traps
ethernet
cfm
cc
[mep-up]
[mep-down]
[config]
[loop] [cross-connect]
22.
snmp-server
enable
traps
ethernet
cfm
crosscheck
[mep-unknown |
mep-missing |
service-up]
23.
end
DETAILED STEPS
Provisioning Service
- Provisioning Service on the CE-A
- Provisioning Service on the U-PE A
- Provisioning Service on the PE-AGG A
- Provisioning Service on the N-PE A
- Provisioning Service on the CE-B
- Provisioning Service on the U-PE B
- Provisioning Service on the PE-AGG B
- Provisioning Service on the N-PE B
Provisioning Service on the CE-A
Perform this task to set up service for Ethernet CFM. Optionally, when this task is completed, you may configure and enable the cross-check function. To perform this optional task, see “Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-A”.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mep
domain
domain-name
mpid
id
19.
end
DETAILED STEPS
Provisioning Service on the U-PE A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mep
domain
domain-name
mpid
id
19.
exit
20.
exit
21.
interface
type
number
22.
service
instance
id
ethernet [evc-name]
23.
encapsulation
encapsulation-type
24.
bridge-domain
bridge-id
25.
cfm
mip
level
level
26.
end
DETAILED STEPS
Provisioning Service on the PE-AGG A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
interface
type
number
12.
service
instance
id
ethernet [evc-name]
13.
encapsulation
encapsulation-type
14.
bridge-domain
bridge-id
15.
cfm
mip
level
level
16.
end
DETAILED STEPS
Provisioning Service on the N-PE A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mip
level
level
19.
exit
20.
exit
21.
interface
type
number
22.
service
instance
id
ethernet [evc-name ]
23.
encapsulation
encapsulation-type
24.
bridge-domain
bridge-id
25.
cfm
mep
domain
domain-name
mpid
id
26.
end
DETAILED STEPS
Provisioning Service on the CE-B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mep
domain
domain-name
mpid
id
19.
end
DETAILED STEPS
Provisioning Service on the U-PE B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mip
level
level
19.
exit
20.
exit
21.
interface
type
number
22.
service
instance
id
ethernet [evc-name]
23.
encapsulation
encapsulation-type
24.
bridge-domain
bridge-id
25.
cfm
mep
domain
domain-name
mpid
id
26.
end
DETAILED STEPS
Provisioning Service on the PE-AGG B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
interface
type
number
12.
service
instance
id
ethernet [evc-name]
13.
encapsulation
encapsulation-type
14.
bridge-domain
bridge-id
15.
cfm
mip
level
level
16.
end
DETAILED STEPS
Provisioning Service on the N-PE B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
service
short-ma-name
evc
evc-name
vlan
vlanid
direction
down
5.
continuity-check
6.
continuity-check [interval
cc-interval]
7.
exit
8.
mep
archive-hold-time
minutes
9.
exit
10.
ethernet
cfm
global
11.
ethernet
cfm
traceroute
cache
12.
ethernet
cfm
traceroute
cache
size
entries
13.
ethernet
cfm
traceroute
cache
hold-time
minutes
14.
interface
type
number
15.
service
instance
id
ethernet [evc-name]
16.
encapsulation
encapsulation-type
17.
bridge-domain
bridge-id
18.
cfm
mip
level
level
19.
exit
20.
exit
21.
interface
type
number
22.
service
instance
id
ethernet [evc-name]
23.
encapsulation
encapsulation-type
24.
bridge-domain
bridge-id
25.
cfm
mep
domain
domain-name
mpid
id
26.
end
DETAILED STEPS
Configuring and Enabling the Cross-Check Function
- Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-A
- Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-B
- Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-A
- Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-B
Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-A
Perform this task to configure and enable cross-checking for an inward facing MEP. This task requires you to configure and enable cross-checking on two devices. This task is optional.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
mep
crosscheck
mpid
id
vlan
vlan-id
[mac
mac-address]
5.
exit
6.
ethernet
cfm
mep
crosscheck
start-delay
delay
7.
exit
8.
ethernet
cfm
mep
crosscheck
{enable |
disable}
level {level-id |
level-id-level-id [,level-id-level-id]}
vlan
{vlan-id |
any |
vlan-id-vlan-id [,vlan-id-vlan-id]}
DETAILED STEPS
Example
The following example configures cross-checking on an inward facing MEP (U-PE A):
U-PE A ethernet cfm domain ServiceProvider level 4 mep crosscheck mpid 402 vlan 100 ! ethernet cfm mep crosscheck start-delay 60
The following example enables cross-checking on an inward facing MEP (U-PE A):
U-PE A U-PEA# ethernet cfm mep crosscheck enable level 4 vlan 100
Configuring and Enabling Cross-Checking for an Inward Facing MEP on the U PE-B
Perform this task to configure and enable cross-checking for an inward facing MEP. This task requires you to configure and enable cross-checking on two devices. This task is optional.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
4.
mep
crosscheck
mpid
id
vlan
vlan-id
[mac
mac-address]
5.
exit
6.
ethernet
cfm
mep
crosscheck
start-delay
delay
7.
exit
8.
ethernet
cfm
mep
crosscheck
{enable |
disable}
level {level-id |
level-id-level-id [,level-id-level-id]}
vlan
{vlan-id |
any |
vlan-id-vlan-id [,vlan-id-vlan-id]}
DETAILED STEPS
Example
The following example configures cross-checking on an inward facing MEP (U-PE B)
U-PE B ethernet cfm domain ServiceProvider level 4 mep crosscheck mpid 401 vlan 100 ! ethernet cfm mep crosscheck start-delay 60
The following example enables cross-checking on an inward facing MEP (U-PE B)
U-PE B U-PEB# ethernet cfm mep crosscheck enable level 4 vlan 100
Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-A
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
[direction
outward]
4.
mep
crosscheck
mpid
id
vlan
vlan-id
[mac
mac-address]
5.
exit
6.
ethernet
cfm
mep
crosscheck
start-delay
delay
7.
exit
8.
ethernet
cfm
mep
crosscheck
{enable |
disable}
level {level-id |
level-id-level-id [,level-id-level-id]}
vlan
{vlan-id |
any |
vlan-id-vlan-id [,vlan-id-vlan-id]}
DETAILED STEPS
Configuring and Enabling Cross-Checking for an Outward Facing MEP on the CE-B
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
[direction
outward]
4.
mep
crosscheck
mpid
id
vlan
vlan-id
[mac
mac-address]
5.
exit
6.
ethernet
cfm
mep
crosscheck
start-delay
delay
7.
exit
8.
ethernet
cfm
mep
crosscheck
{enable |
disable}
level {level-id |
level-id-level-id [,level-id-level-id]}
vlan
{vlan-id |
any |
vlan-id-vlan-id [,vlan-id-vlan-id]}
DETAILED STEPS
Configuring CFM over Bridge Domains
Perform this task to configure Ethernet CFM over bridge domains. This task is optional.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
direction
outward
4.
service
csi-id
evc
evc-name
5.
exit
6.
ethernet
cfm
domain
domain-name
level
level-id
7.
exit
8.
ethernet
cfm
domain
domain-name
level
level-id
9.
service
csi-id
evc
evc-name
10.
mep
crosscheck
mpid
id
evc
evc-name
mac
mac-address
11.
exit
12.
ethernet
evc
evc-name
13.
exit
14.
interface
type
number
15.
no
ip
address
16.
service
instance
id
ethernet
evc-id
17.
encapsulation
dot1q
vlan-id
18.
bridge-domain
bridge-id
19.
cfm
mep
domain
domain-name
mpid
mpid-value
20.
end
21.
configure
terminal
22.
interface
type
name
23.
no
ip
address
24.
ethernet
cfm
mip
level
level-id
25.
service
instance
id
ethernet
evc-id
26.
encapsulation
dot1q
vlan-id
27.
bridge-domain
bridge-id
28.
cfm
mep
domain
domain-name
mpid
mpid-value
29.
end
30.
configure
terminal
31.
ethernet
cfm
cc
enable
level
level-id
evc
evc-name
32.
ethernet
cfm
cc
level
any
evc
evc-name
interval
seconds
loss-threshold
num-msgs
33.
end
DETAILED STEPS
When
configuring CFM over bridge domains where the bridge-domain ID matches the vlan
ID service, you must configure the vlan service and the EVC service with the
same service name. The bridge-domain is associated with the EVC service. The
vlan and the bridge-domain represent the same broadcast domain.
Note
Configuring UP MEP over Port Channel in L2VPN
Perform this task to configure up Maintenance End Point (MEP) over port channel in Layer 2 VPN (L2VPN). This task shows Provider Edge 1 and 2 configurations.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
ieee
4.
ethernet
cfm
global
5.
ethernet
cfm
domain
domain-name
level
level-id
6.
service
csi-id
evc
evc-name
7.
continuity-check [inteval
time]
8.
exit
9.
ethernet
evc
evc-name
10.
pseudowire-class
pw-class-name
11.
encapsulation mpls
12.
exit
13.
interface
type
number
14.
service
instance
id
ethernet
evc-id
15.
encapsulation
dot1q
vlan-id
16.
rewrite
ingress tag pop 1 symmetric
17.
xconnect
peer-ip-addressvc-id
pw-class
pw-class-name
18.
cfm
mep
domain
domain-name
mpid
mpid-value
19.
exit
20.
ethernet
cfm
ieee
21.
ethernet
cfm
global
22.
ethernet
cfm
domain
domain-name
level
level-id
23.
service
csi-id
evc
evc-name
24.
continuity-check [inteval
ime]
25.
exit
26.
ethernet
evc
evc-name
27.
pseudowire-class
pw-class-name
28.
encapsulation mpls
29.
exit
30.
interface
type
number
31.
service
instance
id
ethernet
evc-id
32.
encapsulation
dot1q
vlan-id
33.
rewrite
ingress tag pop 1 symmetric
34.
xconnect
peer-ip-addressvc-id
pw-class
pw-class-name
35.
cfm
mep
domain
domain-name
mpid
mpid-value
DETAILED STEPS
Configuring UP MEP over Port Channel in VPLS
Perform this task to configure up Maintenance End Point (MEP) over port channel in VPLS. This task shows configurations for Provider Edge (PE)1 and PE2 devices.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
ieee
4.
ethernet
cfm
global
5.
ethernet
cfm
domain
domain-name
level
level-id
6.
service
csi-id
evc
evc-name
7.
continuity-check [inteval
time]
8.
exit
9.
ethernet
evc
evc-name
10.
exit
11.
l2vpn
vfi
context
name
12.
vpn
id
vpn-id
13.
evc
evc-name
14.
member
ip-address
encapsulation
mpls
15.
exit
16.
interface
type
number
17.
service
instance
id
ethernet
evc-id
18.
encapsulation
dot1q
vlan-id
19.
rewrite
ingress tag pop 1 symmetric
20.
cfm
mep
domain
domain-name
mpid
mpid-value
21.
exit
22.
bridge-domain
bridge-id
23.
member
interface-type-number
service-instance
service-id
24.
member
interface-type-number
25.
exit
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
| Step 1 |
enable
Example: Device> enable |
Enables privileged EXEC mode. |
| Step 2 |
configure
terminal
Example: Device# configure terminal |
Enters global configuration mode. |
| Step 3 |
ethernet
cfm
ieee
Example: Device(config)# ethernet cfm ieee |
Enables the Ethernet Connectivity Fault Management 802.1ag Standard (CFM IEEE) version of CFM. |
| Step 4 |
ethernet
cfm
global
Example: Device(config)# ethernet cfm global |
Enables Ethernet connectivity fault management (CFM) globally on a device. |
| Step 5 |
ethernet
cfm
domain
domain-name
level
level-id
Example: Device(config)# ethernet cfm domain CUSTOMER level 7 |
Defines a CFM maintenance domain at a particular level and enters Ethernet CFM configuration mode. |
| Step 6 |
service
csi-id
evc
evc-name
Example: Device(config-ether-cfm)# service customer100 evc evc100 |
Sets a universally unique ID for a customer service instance (CSI) within a maintenance domain. |
| Step 7 |
continuity-check [inteval
time]
Example: Device(config-ether-cfm)# continuity-check interval 1s |
Enables the transmission of continuity check messages (CCMs) |
| Step 8 |
exit
Example: Device(config-ether-cfm)# exit |
Returns to global configuration mode. |
| Step 9 |
ethernet
evc
evc-name
Example: Device(config)# ethernet evc evc100 |
Enables the Ethernet Connectivity Fault Management 802.1ag Standard (CFM IEEE) version of CFM. |
| Step 10 |
exit
Example: Device(config-evc)# exit |
Returns to global configuration mode. |
| Step 11 |
l2vpn
vfi
context
name
Example: Device(config)# l2vpn vfi context vpls1 |
Establishes a Layer 2 VPN (L2VPN) virtual forwarding interface (VFI) between two or more separate networks and enters VFI configuration mode. |
| Step 12 |
vpn
id
vpn-id
Example: Device(config-vfi)# vpn id 1 |
Updates a VPN ID on a Virtual Private LAN Services (VPLS) instance. |
| Step 13 |
evc
evc-name
Example: Device(config-vfi)# evc evc100 |
Configures an EVC on a VPLS instance. |
| Step 14 |
member
ip-address
encapsulation
mpls
Example: Device(config-vfi)# member 10.1.1.1 encapsulation mpls |
Specifies the devices that form a point-to-point Layer 2 VPN (L2VPN) virtual forwarding interface (VFI) connection. |
| Step 15 |
exit
Example: Device (config-vfi)# exit |
Exits VFI configuration mode and returns to global configuration mode. |
| Step 16 |
interface
type
number
Example: Device(config)# interface port-channel 10 |
Specifies an interface and enters interface configuration mode. |
| Step 17 |
service
instance
id
ethernet
evc-id
Example: Device(config-if)# service instance 100 ethernet evc100 |
Specifies an Ethernet service instance on an interface and enters service instance configuration mode. |
| Step 18 |
encapsulation
dot1q
vlan-id
Example: Device(config-if-srv)# encapsulation dot1q 100 |
Defines the matching criteria to map 802.1Q frames on an ingress interface to the appropriate service instance. |
| Step 19 |
rewrite
ingress tag pop 1 symmetric
Example: Device(config-if-srv)# rewrite ingress tag pop 1 symmetric |
Specifies the encapsulation adjustment to be performed on a frame ingressing a service instance. |
| Step 20 |
cfm
mep
domain
domain-name
mpid
mpid-value
Example: Device(config-if-srv)# cfm mep domain CUSTOMER mpid 1001 |
Configures a MEP for a domain. |
| Step 21 |
exit
Example: Device (config-if-srv)# exit |
Exits service instance configuration mode and returns to global configuration mode. |
| Step 22 |
bridge-domain
bridge-id
Example: Device(config)# bridge-domain 100 |
Configures the components on a bridge domain and enters bridge-domain configuration mode. |
| Step 23 |
member
interface-type-number
service-instance
service-id
Example: Device(config-bdomain)# member port-channel 10 service-instance 100 |
Binds a service instance to a bridge domain instance. |
| Step 24 |
member
interface-type-number
Example: Device(config-bdomain)# member vfi vpls1 |
Binds a service instance to a bridge domain instance. |
| Step 25 |
exit
Example: Device (config-bdomain)# exit |
Exits bridge domain configuration mode and returns to global configuration mode. |
Configuring Down MEP over Port Channel
Perform this task to configure down MEP over port channel.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
ieee
4.
ethernet
cfm
global
5.
ethernet
cfm
domain
domain-name
level
level-id
6.
service
csi-id
evc
evc-name
s
vlan
vlan-id
direction
down
7.
continuity-check [inteval
time]
8.
exit
9.
ethernet
evc
evc-name
10.
exit
11.
interface
type
number
12.
service
instance
id
ethernet
evc-id
13.
encapsulation
dot1q
vlan-id
14.
bridge-domain
bridge-id
15.
cfm
mep
domain
domain-name
mpid
mpid-value
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
| Step 1 |
enable
Example: Device> enable |
Enables privileged EXEC mode. |
| Step 2 |
configure
terminal
Example: Device# configure terminal |
Enters global configuration mode. |
| Step 3 |
ethernet
cfm
ieee
Example: Device(config)# ethernet cfm ieee |
Enables the Ethernet Connectivity Fault Management 802.1ag Standard (CFM IEEE) version of CFM. |
| Step 4 |
ethernet
cfm
global
Example: Device(config)# ethernet cfm global |
Enables Ethernet connectivity fault management (CFM) globally on a device. |
| Step 5 |
ethernet
cfm
domain
domain-name
level
level-id
Example: Device(config)# ethernet cfm domain CUSTOMER level 7 |
Defines a CFM maintenance domain at a particular level and enters Ethernet CFM configuration mode. |
| Step 6 |
service
csi-id
evc
evc-name
s
vlan
vlan-id
direction
down
Example: Device(config-ether-cfm)# service customer_100 evc evc_100 vlan 100 direction down |
Configures a maintenance association within a maintenance domain and enter Ethernet connectivity fault management (CFM) service configuration mode. |
| Step 7 |
continuity-check [inteval
time]
Example: Device(config-ether-cfm)# continuity-check interval 1s |
Enables the transmission of continuity check messages (CCMs) |
| Step 8 |
exit
Example: Device(config-ether-cfm)# exit |
Returns to global configuration mode. |
| Step 9 |
ethernet
evc
evc-name
Example: Device(config)# ethernet evc evc_100 |
Enables the Ethernet Connectivity Fault Management 802.1ag Standard (CFM IEEE) version of CFM. |
| Step 10 |
exit
Example: Device (config-ecfm-srv)# exit |
Exits Ethernet CFM configuration mode and returns to global configuration mode. |
| Step 11 |
interface
type
number
Example: Device(config)# interface port-channel10 |
Specifies an interface and enters interface configuration mode. |
| Step 12 |
service
instance
id
ethernet
evc-id
Example: Device(config-if)# service instance 100 ethernet evc_100 |
Specifies an Ethernet service instance on an interface and enters service instance configuration mode. |
| Step 13 |
encapsulation
dot1q
vlan-id
Example: Device(config-if-srv)# encapsulation dot1q 100 |
Defines the matching criteria to map 802.1Q frames on an ingress interface to the appropriate service instance. |
| Step 14 |
bridge-domain
bridge-id
Example: Device(config-if-srv)# bridge domain 100 |
Configures the components on a bridge domain. |
| Step 15 |
cfm
mep
domain
domain-name
mpid
mpid-value
Example: Device(config-if-srv)# cfm mep domain CUSTOMER mpid 2222 |
Configures a MEP for a domain. |
Configuring CFM Offload
Perform this task to configure Connectivity Fault Management (CFM) offload.
1.
enable
2.
configure
terminal
3.
ethernet
cfm
ieee
4.
ethernet
cfm
global
5.
ethernet
cfm
domain
domain-name
level
level-id
6.
service
csi-id
evc
evc-name
7.
continuity-check [inteval
time]
8.
offload sampling
sample
9.
exit
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
| Step 1 |
enable
Example: Device> enable |
Enables privileged EXEC mode. |
| Step 2 |
configure
terminal
Example: Device# configure terminal |
Enters global configuration mode. |
| Step 3 |
ethernet
cfm
ieee
Example: Device(config)# ethernet cfm ieee |
Enables the Ethernet Connectivity Fault Management 802.1ag Standard (CFM IEEE) version of CFM. |
| Step 4 |
ethernet
cfm
global
Example: Device(config)# ethernet cfm global |
Enables Ethernet connectivity fault management (CFM) globally on a device. |
| Step 5 |
ethernet
cfm
domain
domain-name
level
level-id
Example: Device(config)# ethernet cfm domain CUSTOMER level 7 |
Defines a CFM maintenance domain at a particular level and enters Ethernet CFM configuration mode. |
| Step 6 |
service
csi-id
evc
evc-name
Example: Device(config-ether-cfm)# service customer100 evc evc100 |
Sets a universally unique ID for a customer service instance (CSI) within a maintenance domain. |
| Step 7 |
continuity-check [inteval
time]
Example: Device(config-ether-cfm)# continuity-check interval 3.3s |
Enables the transmission of continuity check messages (CCMs) |
| Step 8 |
offload sampling
sample
Example: Device(config-ether-cfm)# offload sampling 1000 |
Configured offload sampling. |
| Step 9 |
exit
Example: Device(config-ether-cfm)# exit |
Returns to global configuration mode. |
Troubleshooting Tips
To verify and isolate a fault, start at the highest level maintenance domain and do the following:
Check the device error status.
When an error exists, perform a loopback test to confirm the error.
Run a traceroute to the destination to isolate the fault.
If the fault is identified, correct the fault.
If the fault is not identified, go to the next lower maintenance domain and repeat these four steps at that maintenance domain level.
Repeat the first four steps, as needed, to identify and correct the fault.
Configuring Ethernet OAM Interaction with CFM
For Ethernet OAM to function with CFM, you must configure an EVC and the OAM manager and associate the EVC with CFM. Additionally, you must use an inward facing MEP when you want interaction with the OAM manager.
Configuring the OAM Manager
Note | If you configure, change, or remove a UNI service type, EVC, Ethernet service instance, or CE-VLAN configuration, all configurations are checked to ensure that UNI service types are matched with EVC configurations and Ethernet service instances are matched with CE-VLAN configurations. Configurations are rejected if the pairings do not match. |
1.
enable
2.
configure
terminal
3.
ethernet
cfm
domain
domain-name
level
level-id
[direction
outward]
4.
service
csi-id
vlan
vlan-id
5.
exit
6.
ethernet
evc
evc-id
7.
oam
protocol
{cfm
svlan
svlan-id
domain
domain-name |
ldp}
8.
exit
9. Repeat Steps 3 through 8 to define other CFM domains that you want OAM manager to monitor.
10.
end
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
| Step 1 |
enable
Example: Device> enable |
Enables privileged EXEC mode. |
| Step 2 |
configure
terminal
Example: Device# configure terminal |
Enters global configuration mode. |
| Step 3 |
ethernet
cfm
domain
domain-name
level
level-id
[direction
outward]
Example: Device(config)# ethernet cfm domain cstmr1 level 3 |
Defines a CFM domain, sets the domain level, and enters Ethernet CFM configuration mode. |
| Step 4 |
service
csi-id
vlan
vlan-id
Example: Device(config-ether-cfm)# service csi2 vlan 10 |
Defines a universally unique customer service instance (CSI) and VLAN ID within the maintenance domain. |
| Step 5 |
exit
Example: Device(config-ether-cfm)# exit |
Returns to global configuration mode. |
| Step 6 |
ethernet
evc
evc-id
Example: Device(config)# ethernet evc 50 |
Defines an EVC and enters EVC configuration mode. |
| Step 7 |
oam
protocol
{cfm
svlan
svlan-id
domain
domain-name |
ldp}
Example: Device(config-evc)# oam protocol cfm svlan 10 domain cstmr1 |
Configures the EVC OAM protocol. |
| Step 8 |
exit
Example: Device(config-evc)# exit |
Returns to global configuration mode. |
| Step 9 | Repeat Steps 3 through 8 to define other CFM domains that you want OAM manager to monitor. |
— |
| Step 10 |
end
Example: Device(config)# end |
Returns to privileged EXEC mode. |
Enabling Ethernet OAM
The order in which the global and interface configuration commands are issued determines the configuration. The last command that is issued has precedence.
Perform this task to enable Ethernet OAM on a device or on an interface.
1.
enable
2.
configure
terminal
3.
interface
type
number
4.
ethernet
oam
[max-rate
oampdus |
min-rate
num-seconds|
mode
{active |
passive} |
timeout
seconds]
5.
end
DETAILED STEPS
| Command or Action | Purpose | |
|---|---|---|
| Step 1 |
enable
Example: Device> enable |
Enables privileged EXEC mode. |
| Step 2 |
configure
terminal
Example: Device# configure terminal |
Enters global configuration mode. |
| Step 3 |
interface
type
number
Example:
|
Specifies an interface and enters interface configuration mode. |
| Step 4 |
ethernet
oam
[max-rate
oampdus |
min-rate
num-seconds|
mode
{active |
passive} |
timeout
seconds]
Example: Device(config-if)# ethernet oam max-rate 50 |
Enables Ethernet OAM on an interface. |
| Step 5 |
end
Example: Device(config-if)# end |
Returns to privileged EXEC mode. |
Configuration Examples for Configuring Ethernet CFM in a Service Provider Network
Example: Provisioning a Network
This configuration example shows only CFM-related commands. All commands that are required to set up the data path and configure the VLANs on the device are not shown. However, it should be noted that CFM traffic will not flow into or out of the device if the VLANs are not properly configured.
CE-A ! ethernet cfm domain Customer level 7 !! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 !! ethernet cfm cc level any vlan any interval 20 loss-threshold 3 ! snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up U-PE A ! ethernet cfm domain Customer level 7 ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 ! ethernet cfm domain OperatorA level 1 mep archive-hold-time 65 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 1 ! ethernet cfm cc level any vlan any interval 20 loss-threshold 3 ! snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up PE-AGG A ethernet cfm domain OperatorA level 1 mep archive-hold-time 65 ! ethernet cfm global ! ethernet cfm mip level 1 ! ethernet cfm mip level 1 N-PE A ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 ! ethernet cfm domain OperatorA level 1 mep archive-hold-time 65 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 1 ! ethernet cfm cc level any vlan any interval 20 loss-threshold 3 ! snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up U-PE B ! ethernet cfm domain Customer level 7 ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 ! ethernet cfm domain OperatorB level 2 mep archive-hold-time 65 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 2 ! ethernet cfm cc level any vlan any interval 20 loss-threshold 3 ! snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up PE-AGG B ethernet cfm domain OperatorB level 2 mep archive-hold-time 65 ! ethernet cfm global ! ethernet cfm mip level 2 ! ethernet cfm mip level 2 N-PE B ! ethernet cfm cc level any vlan any interval 20 loss-threshold 3 ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 ! ethernet cfm domain OperatorB level 2 mep archive-hold-time 65 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 2 ! snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up CE-B ! ethernet cfm domain Customer level 7 !! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 !! ethernet cfm cc level any vlan any interval 20 loss-threshold 3 ! snmp-server enable traps ethernet cfm cc mep-up mep-down cross-connect loop config snmp-server enable traps ethernet cfm crosscheck mep-missing mep-unknown service-up
Example: Provisioning Service
This configuration example shows only CFM-related commands. All commands that are required to set up the data path and configure the VLANs on the device are not shown. However, it should be noted that CFM traffic will not flow into or out of the device if the VLANs are not properly configured.
CE-A ! ethernet cfm domain Customer level 7 service Customer1 evc evc1 vlan 100 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mep level 7 direction outward domain Customer1 mpid 701 vlan 100 ! ethernet cfm cc enable level 7 vlan 100 ethernet cfm cc level any vlan any interval 20 loss-threshold 3 U-PE A ! ethernet cfm domain Customer level 7 ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 service MetroCustomer10pA evc evc1 vlan 100 ! ethernet cfm domain OperatorA level 1 mep archive-hold-time 65 service MetroCustomer10pA evc evc1 vlan 100 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 7 ethernet cfm mep level 4 mpid 401 vlan 100 ethernet cfm mep level 1 mpid 101 vlan 100 ! ethernet cfm mip level 1 ! ethernet cfm cc enable level 4 vlan 100 ethernet cfm cc enable level 1 vlan 100 ethernet cfm cc level any vlan any interval 20 loss-threshold 3 PE-AGG A ethernet cfm domain OperatorA level 1 mep archive-hold-time 65 service MetroCustomer10pA evc evc1 vlan 100 ! ethernet cfm global ! ethernet cfm mip level 1 ! ethernet cfm mip level 1 N-PE A ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 service MetroCustomer1 evc evc1 vlan 100 ! ethernet cfm domain OperatorA level 1 mep archive-hold-time 65 service MetroCustomer10pA evc evc1 vlan 100 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 1 ! ethernet cfm mip level 4 ethernet cfm mep level 1 mpid 102 vlan 100 ! ethernet cfm cc enable level 1 vlan 100 ethernet cfm cc level any vlan any interval 20 loss-threshold 3 U-PE B ! ethernet cfm domain Customer level 7 ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 service MetroCustomer1 evc evc1 vlan 100 ! ethernet cfm domain OperatorB level 2 mep archive-hold-time 65 service MetroCustomer10pB evc evc1 vlan 100 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 7 ethernet cfm mep level 4 mpid 402 vlan 100 ethernet cfm mep level 2 mpid 201 vlan 100 ! ethernet cfm mip level 2 ! ethernet cfm cc enable level 4 vlan 100 ethernet cfm cc enable level 2 vlan 100 ethernet cfm cc level any vlan any interval 20 loss-threshold 3 PE-AGG B ethernet cfm domain OperatorB level 2 mep archive-hold-time 65 service MetroCustomer10pB evc evc1 vlan 100 ! ethernet cfm global ! ethernet cfm mip level 2 ! ethernet cfm mip level 2 N-PE B ! ethernet cfm domain ServiceProvider level 4 mep archive-hold-time 60 service MetroCustomer1 evc evc1 vlan 100 ! ethernet cfm domain OperatorB level 2 mep archive-hold-time 65 service MetroCustomer10pB evc evc1 vlan 100 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mip level 2 ! ethernet cfm mip level 4 ethernet cfm mep level 2 mpid 202 vlan 100 ! ethernet cfm cc enable level 2 vlan 100 ethernet cfm cc level any vlan any interval 20 loss-threshold 3 CE-B ! ethernet cfm domain Customer level 7 service Customer1 vlan 100 ! ethernet cfm global ethernet cfm traceroute cache ethernet cfm traceroute cache size 200 ethernet cfm traceroute cache hold-time 60 ! ethernet cfm mep level 7 direction outward domain Customer1 mpid 702 vlan 100 ! ethernet cfm cc enable level 7 vlan 100 ethernet cfm cc level any vlan any interval 20 loss-threshold 3
Glossary
CCM—continuity check message. A multicast CFM frame that a MEP transmits periodically to ensure continuity across the maintenance entities to which the transmitting MEP belongs, at the MA level on which the CCM is sent. No reply is sent in response to receiving a CCM.
EVC—Ethernet virtual connection. An association of two or more user-network interfaces.
fault alarm—An out-of-band signal, typically an SNMP notification, that notifies a system administrator of a connectivity failure.
inward-facing MEP—A MEP that resides in a bridge and transmits to and receives CFM messages from the direction of the bridge relay entity.
maintenance domain—The network or part of the network belonging to a single administration for which faults in connectivity are to be managed. The boundary of a maintenance domain is defined by a set of DSAPs, each of which may become a point of connectivity to a service instance.
maintenance domain name—The unique identifier of a domain that CFM is to protect against accidental concatenation of service instances.
MEP—maintenance endpoint. An actively managed CFM entity associated with a specific DSAP of a service instance, which can generate and receive CFM frames and track any responses. It is an endpoint of a single MA, and terminates a separate maintenance entity for each of the other MEPs in the same MA.
MEP CCDB—A database, maintained by every MEP, that maintains received information about other MEPs in the maintenance domain.
MIP—maintenance intermediate point. A CFM entity, associated with a specific pair of ISS SAPs or EISS Service Access Points, which reacts and responds to CFM frames. It is associated with a single maintenance association and is an intermediate point within one or more maintenance entities.
MIP CCDB—A database of information about the MEPs in the maintenance domain. The MIP CCDB can be maintained by a MIP.
MP—maintenance point. Either a MEP or a MIP.
MPID—maintenance endpoint identifier. A small integer, unique over a given MA, that identifies a specific MEP.
OAM—operations, administration, and maintenance. A term used by several standards bodies to describe protocols and procedures for operating, administrating, and maintaining networks. Examples are ATM OAM and IEEE Std. 802.3ah OAM.
operator—Entity that provides a service provider a single network of provider bridges or a single Layer 2 or Layer 3 backbone network. An operator may be identical to or a part of the same organization as the service provider. For purposes of IEEE P802.1ag, Draft Standard for Local and Metropolitan Area Networks, the operator and service provider are presumed to be separate organizations.
Terms such as “customer,” “service provider,” and “operator” reflect common business relationships among organizations and individuals that use equipment implemented in accordance with IEEE P802.1ag.
UNI—user-network interface. A common term for the connection point between an operator's bridge and customer equipment. A UNI often includes a C-VLAN-aware bridge component. The term UNI is used broadly in the IEEE P802.1ag standard when the purpose for various features of CFM are explained. UNI has no normative meaning.
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