Configuring Link Bundling

This module describes the configuration of link bundle interfaces on the Cisco NCS 6000 Series Router.

A link bundle is a group of one or more ports that are aggregated together and treated as a single link. The Link Bundling feature allows you to group multiple point-to-point links together into one logical link and provide higher bidirectional bandwidth, redundancy, and load balancing between two routers. A virtual interface is assigned to the bundled link. The component links can be dynamically added and deleted from the virtual interface. The virtual interface is treated as a single interface on which you can configure an IP address and other software features used by the link bundle. Packets sent to the link bundle are forwarded to one of the links in the bundle.

Each bundle has a single MAC and shares a single Layer 3 configuration set, such as IP address, ACL, Quality of Service (QoS), and so on.


Note

Link bundles do not have a one-to-one modular services card association. Member links can terminate on different cards.

Feature History for Configuring Link Bundling

Release

Modification

Release 5.2.5

Bundle Fast Convergence feature was added.

Release 5.0.0

This feature was introduced.

Prerequisites for Configuring Link Bundling

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The prerequisites for link bundling depend on the platform on which you are configuring this feature.

This section includes the following information:

Prerequisites for Configuring Link Bundling

Before configuring link bundling, be sure that these tasks and conditions are met:

  • You know which links should be included in the bundle you are configuring.

  • If you are configuring an Ethernet link bundle, you have at least one of the following Ethernet cards installed in the router:

    • 4-Port 10-Gigabit Ethernet PLIM

    • 8-Port 10-Gigabit Ethernet PLIM

    • 10-Port Gigabit Ethernet SPA

    • 42-Port Gigabit Ethernet PLIM

    • 1-Port 100-Gigabit Ethernet PLIM

Information About Configuring Link Bundling

To configure link bundling, you must understand the following concepts:

Link Bundling Overview

The Link Bundling feature allows you to group multiple point-to-point links together into one logical link and provide higher bidirectional bandwidth, redundancy, and load balancing between two routers. A virtual interface is assigned to the bundled link. The component links can be dynamically added and deleted from the virtual interface.

The virtual interface is treated as a single interface on which one can configure an IP address and other software features used by the link bundle. Packets sent to the link bundle are forwarded to one of the links in the bundle.

The advantages of link bundles are as follows:

  • Multiple links can span several line cards to form a single interface. Thus, the failure of a single link does not cause a loss of connectivity.
  • Bundled interfaces increase bandwidth availability, because traffic is forwarded over all available members of the bundle. Therefore, traffic can if one of the links within a bundle fails. can without interrupting packet flow.

For example, a bundle can contain all Ethernet interfaces, or it can contain all POS interfaces, but it cannot contain Ethernet and POS interfaces at the same time.

Cisco IOS XR software supports the following methods of forming bundles of Ethernet interfaces:

  • IEEE 802.3ad—Standard technology that employs a Link Aggregation Control Protocol (LACP) to ensure that all the member links in a bundle are compatible. Links that are incompatible or have failed are automatically removed from a bundle.
  • EtherChannel or POS Channel—Cisco proprietary technology that allows the user to configure links to join a bundle, but has no mechanisms to check whether the links in a bundle are compatible.(EtherChannel applies to Ethernet interfaces, and POS Channel applies to POS interfaces.)

Features and Compatible Characteristics of Link Bundles

Link bundles support these features:

  • ACL

  • Basic IP

  • Basic MPLS

  • MPLS VPN

  • Sampled Netflow

  • BGP Policy Accounting

  • HSRP/VRRP

  • VLAN Bundling (Ethernet only)

  • Inter-AS

  • WRED/MDRR per member interface.

The following list describes the properties and limitations of link bundles:

  • A bundle contains links, each of which has LACP enabled or disabled. If a bundle contains links, some that have LACP enabled and some that have LACP disabled, the links with LACP disabled are not aggregated in the bundle.

  • Bundle membership can span across several modular services cards that are installed in a single router and across SPAS in the same service card.
  • Physical layer and link layer configuration are performed on individual member links of a bundle.
  • Configuration of network layer protocols and higher layer applications is performed on the bundle itself.
  • IPv4 and IPv6 addressing is supported on Ethernet link bundles.
  • For Ethernet link bundling, links within a single bundle should have the same speed.
  • For POS link bundling, the links within a single bundle can have varying speeds. The fastest link can be set to a maximum speed that is four times greater than the slowest link.
  • Mixed bandwidth bundle member configuration is only supported when 1:1 redundancy is configured (this means that a 1 GigabitEthernet member can only be configured as the backup of the 10 GigabitEthernet interface).
  • Mixed link bundle mode is supported only when active standby operation is configured (usually with the lower speed link in standby mode).
  • A bundle can be administratively enabled or disabled.
  • Each individual link within a bundle can be administratively enabled or disabled.

  • If a MAC address is not set on the bundle, the bundle MAC address is obtained from a pool of pre-assigned MAC addresses stored in EEPROM of the chassis midplane.

  • Each link within a bundle can be configured to allow different keepalive periods on different members.

  • Load balancing (the distribution of data between member links) is done by flow instead of by packet.

  • Upper layer protocols, such as routing updates and hellos, are sent over any member link of an interface bundle.

  • All links within a single bundle must terminate on the same two systems. Both systems must be directly connected.
  • Bundled interfaces are point-to-point.
  • A bundle can contain physical links only. Tunnels and VLAN sub-interfaces cannot be bundle members. However, you can create VLANs as sub-interfaces of bundles.

  • An IPv4 address configuration on link bundles is identical to an IPv4 address configuration on regular interfaces.

  • Multicast traffic is load balanced over the members of a bundle. For a given flow, internal processes select the member link, and all traffic for that flow is sent over that member.

Link Aggregation Through LACP

Aggregating interfaces on different modular services cards and on SPAs within the same services cards provides redundancy, allowing traffic to be quickly redirected to other member links when an interface or modular services card failure occurs.

The optional Link Aggregation Control Protocol (LACP) is defined in the IEEE 802 standard. LACP communicates between two directly connected systems (or peers) to verify the compatibility of bundle members. The peer can be either another router or a switch. LACP monitors the operational state of link bundles to ensure the following:

  • All links terminate on the same two systems.
  • Both systems consider the links to be part of the same bundle.
  • All links have the appropriate settings on the peer.

LACP transmits frames containing the local port state and the local view of the partner system’s state. These frames are analyzed to ensure both systems are in agreement.

IEEE 802.3ad Standard

The IEEE 802.3ad standard typically defines a method of forming Ethernet link bundles.

For each link configured as bundle member, the following information is exchanged between the systems that host each end of the link bundle:

  • A globally unique local system identifier
  • An identifier (operational key) for the bundle of which the link is a member
  • An identifier (port ID) for the link
  • The current aggregation status of the link

This information is used to form the link aggregation group identifier (LAG ID). Links that share a common LAG ID can be aggregated. Individual links have unique LAG IDs.

The system identifier distinguishes one router from another, and its uniqueness is guaranteed through the use of a MAC address from the system. The bundle and link identifiers have significance only to the router assigning them, which must guarantee that no two links have the same identifier, and that no two bundles have the same identifier.

The information from the peer system is combined with the information from the local system to determine the compatibility of the links configured to be members of a bundle.

The MAC address of the first link attached to a bundle becomes the MAC address of the bundle itself. The bundle uses this MAC address until that link (the first link attached to the bundle) is detached from the bundle, or until the user configures a different MAC address. The bundle MAC address is used by all member links when passing bundle traffic. Any unicast or multicast addresses set on the bundle are also set on all the member links.


Note

We recommend that you avoid modifying the MAC address, because changes in the MAC address can affect packet forwarding.

LACP Short Period Time Intervals

As packets are exchanged across member links of a bundled interface, some member links may slow down or time-out and fail. LACP packets are exchanged periodically across these links to verify the stability and reliability of the links over which they pass. The configuration of short period time intervals, in which LACP packets are sent, enables faster detection and recovery from link failures.

Short period time intervals are configured as follows:

  • In milliseconds

  • In increments of 100 milliseconds

  • In the range 100 to 1000 milliseconds

  • The default is 1000 milliseconds (1 second)

  • Up to 64 member links

  • Up to 1280 packets per second (pps)

After 6 missed packets, the link is detached from the bundle.

When the short period time interval is not configured, LACP packets are transmitted over a member link every 30 seconds by default.

When the short period time interval is configured, LACP packets are transmitted over a member link once every 1000 milliseconds (1 second) by default. Optionally, both the transmit and receive intervals can be configured to less than 1000 milliseconds, independently or together, in increments of 100 milliseconds (100, 200, 300, and so on).

When you configure a custom LACP short period transmit interval at one end of a link, you must configure the same time period for the receive interval at the other end of the link.


Note

You must always configure the transmit interval at both ends of the connection before you configure the receive interval at either end of the connection. Failure to configure the transmit interval at both ends first results in route flapping (a route going up and down continuously). When you remove a custom LACP short period, you must do it in reverse order. You must remove the receive intervals first and then the transmit intervals.

Load Balancing

Load balancing is a forwarding mechanism which distributes traffic over multiple links, based on Layer 3 routing information in the router. Per-flow load balancing is supported on all links in the bundle. This scheme achieves load sharing by allowing the router to distribute packets over one of the links in the bundle, that is determined through a hash calculation. The hash calculation is an algorithm for link selection based on certain parameters.

The standard hash calculation is a 3-tuple hashing, using the following parameters:

  • IP source address

  • IP destination address

  • Router ID

7-tuple hashing can also be configured. based on Layer 3 and Layer 4 parameters:

  • IP source address

  • IP destination address

  • Router ID

  • Input interface

  • IP protocol

  • Layer 4 source port

  • Layer 4 destination port

When per-flow load balancing and 3-tuple hashing is enabled, all packets for a certain source-destination pair will go through the same link, though there are multiple links available. Per-flow load balancing ensures that packets for a certain source-destination pair arrive in order.


Note

For multicast traffic, ingress forwarding is based on the Fabric Multicast Group Identifier (FGID). Egress forwarding over the bundle is based on the bundle load balancing.

VLANs on an Ethernet Link Bundle

802.1Q VLAN subinterfaces can be configured on 802.3ad Ethernet link bundles. Keep the following information in mind when adding VLANs on an Ethernet link bundle:

  • The maximum number of VLANs allowed per bundle is 128.

  • The maximum number of bundled VLANs allowed per router is 4000.


Note
The memory requirement for bundle VLANs is slightly higher than standard physical interfaces.

To create a VLAN subinterface on a bundle, include the VLAN subinterface instance with the interface Bundle-Ether command, as follows:

interface Bundle-Ether interface-bundle-id.subinterface

After you create a VLAN on an Ethernet link bundle, all VLAN subinterface configuration is supported on that link bundle.

VLAN sub-interfaces can support multiple Layer 2 frame types and services, such as Ethernet Flow Points - EFPs) and Layer 3 services.

Link Bundle Configuration Overview

The following steps provide a general overview of the link bundle configuration. Keep in mind that a link must be cleared of all previous network layer configuration before it can be added to a bundle:

  1. In XR configuration mode, create a link bundle. To create an Ethernet link bundle, enter the interface Bundle-Ether command. To create a POS link bundle, enter the interface Bundle-POS command.
  2. Assign an IP address and subnet mask to the virtual interface using the ipv4 address command.
  3. Add interfaces to the bundle you created in Step 1 with the bundle id command in the interface configuration submode. You can add up to 64 links to a single bundle.

  4. You can optionally implement 1:1 link protection for the bundle by setting the bundle maximum-active links command to 1. Performing this configuration causes the highest-priority link in the bundle to become active and the second-highest-priority link to become the standby. (The link priority is based on the value of the bundle port-priority command.) If the active link fails, the standby link immediately becomes the active link.


Note
A link is configured as a member of a bundle from the interface configuration submode for that link.

Nonstop Forwarding During RP Switchover

Cisco IOS XR software supports nonstop forwarding during switchover between active and standby paired RP cards. Nonstop forwarding ensures that there is no change in the state of the link bundles when a switchover occurs.

For example, if an active RP fails, the standby RP becomes operational. The configuration, node state, and checkpoint data of the failed RP are replicated to the standby RP . The bundled interfaces will all be present when the standby RP becomes the active RP .


Note
You do not need to configure anything to guarantee that the standby interface configurations are maintained.

Link Switchover

By default, a maximum of 64 links in a bundle can actively carry traffic on a Cisco NCS 6000 Series Router. If one member link in a bundle fails, traffic is redirected to the remaining operational member links.

Bundle Fast Convergence

The Bundle Fast Convergence (BFC) feature provides the ability to converge bundle members within sub seconds instead of multiple seconds. This feature provides faster bundle member convergence with deterministic traffic outage bounded within 50 milliseconds.

On bundle member shut, the packet drop is reduced to less than 50 milliseconds. On multiple members shut, the loss is less than (n*50ms), where 'n' is the number of members being shut.

BFC Functionality

The BFC feature decouples the tasks FIB is performing for bundle membership updates. This splits the FIB's bundle membership tasks into two separate threads:

  • FAST Update (FRR thread): This option does In-Place-Modify (IPM) only, which guarantees deterministic outage time. FIB gets the bundle member down directly from Bundle Interface Manager (BIM) using Fast Protect Infra (similar to TE FRR update model).
  • SLOW Update (Adjacency thread): Adjacency update from AIB, which is the current processing logic; does the following tasks:
    • IPM on the current hardware entries
    • Create a new set of hardware entries with new membership information

BFC tracks the bundle members that are down from FAST channel by setting a pending flag, then when SLOW update AIB is received it looks for FAST down member. If the BFC finds the FAST down member, it clears the pending flag, if it does not, it processes the SLOW update and considers the FAST down member as down and programs to the hardware.

Condition for BFC

The bundle must contain N members (they may be of different bandwidth, belong to different slices or Line Cards) and at the most N-1 members could be shut down in a single or multiple commits.


Note
Shutting down bundle member link/s in single or serial commits is the only valid trigger for BFC. Bundle fast convergence time is calculated based on Frame delta and number of links affected. Convergence time < Number of links affected * 50ms --> 0 (50ms). Convergence time must be < 50ms per flow in the traffic.

Sample BFC Data

The following example shows convergence time data for sixteen individual flows that traffic was sent onto on dual router topology.

This data is taken for a bundle which has ten members including one 100Gig and nine 10Gig members where nine members (including 100Gig) are shut down with individual commits in order to trigger the BFC feature.

Frame Delta

Packet Loss Duration (ms)

Direction

337

6.667

Egress

61

1.187

Egress

254

4.942

Egress

0

0

Egress

255

4.961

Egress

255

4.961

Egress

47

0.914

Egress

0

0

Egress

1226

23.853

Ingress

866

16.849

Ingress

240

4.669

Ingress

1131

22.005

Ingress

0

0

Ingress

526

10.234

Ingress

1243

24.187

Ingress

264

5.136

Ingress

How to Configure Link Bundling

This section contains the following procedures:

Configuring Ethernet Link Bundles

This section describes how to configure an Ethernet link bundle.


Note
MAC accounting is not supported on Ethernet link bundles.

Note
In order for an Ethernet bundle to be active, you must perform the same configuration on both connection endpoints of the bundle.

SUMMARY STEPS

  1. configure
  2. interface Bundle-Ether bundle-id
  3. ipv4 address ipv4-address mask
  4. bundle minimum-active bandwidth kbps
  5. bundle minimum-active links links
  6. bundle maximum-active links links [hot-standby ]
  7. lacp fast-switchover
  8. exit
  9. interface {TenGigE } interface-path-id
  10. bundle id bundle-id [mode {active | on | passive }]
  11. bundle port-priority priority
  12. no shutdown
  13. exit
  14. interface {TenGigE } number
  15. Do one of the following:
    • end
    • commit
  16. exit
  17. exit
  18. Perform Step 1 through Step 15 on the remote end of the connection.
  19. show bundle Bundle-Ether bundle-id
  20. show lacp bundle Bundle-Ether bundle-id

DETAILED STEPS

  Command or Action Purpose
Step 1

configure

Example:


RP/0/RP0/CPU0:router# configure

Enters XR configuration mode.

Step 2

interface Bundle-Ether bundle-id

Example:


RP/0/RP0/CPU0:router#(config)# interface Bundle-Ether 3

Creates a new Ethernet link bundle with the specified bundle-id. The range is 1 to 65535.

This interface Bundle-Ether command enters you into the interface configuration submode, where you can enter interface specific configuration commands are entered. Use the exit command to exit from the interface configuration submode back to the normal XR configuration mode.

Step 3

ipv4 address ipv4-address mask

Example:


RP/0/RP0/CPU0:router(config-if)# ipv4 address 10.1.2.3 255.0.0.0

Assigns an IP address and subnet mask to the virtual interface using the ipv4 address configuration subcommand.

Step 4

bundle minimum-active bandwidth kbps

Example:


RP/0/RP0/CPU0:router(config-if)# bundle minimum-active bandwidth 580000

(Optional) Sets the minimum amount of bandwidth required before a user can bring up a bundle.

Step 5

bundle minimum-active links links

Example:


RP/0/RP0/CPU0:router(config-if)# bundle minimum-active links 2

(Optional) Sets the number of active links required before you can bring up a specific bundle.

Step 6

bundle maximum-active links links [hot-standby ]

Example:


RP/0/RP0/CPU0:router(config-if)# bundle maximum-active links 1 hot-standby

(Optional) Implements 1:1 link protection for the bundle, which causes the highest-priority link in the bundle to become active and the second-highest-priority link to become the standby. Also, specifies that a switchover between active and standby LACP-enabled links is implemented per a proprietary optimization.

Note 
The priority of the active and standby links is based on the value of the bundle port-priority command.
Step 7

lacp fast-switchover

Example:


RP/0/RP0/CPU0:router(config-if)# lacp fast-switchover

(Optional) If you enabled 1:1 link protection (you set the value of the bundle maximum-active links command to 1) on a bundle with member links running LACP, you can optionally disable the wait-while timer in the LACP state machine. Disabling this timer causes a bundle member link in standby mode to expedite its normal state negotiations, thereby enabling a faster switchover from a failed active link to the standby link.

Step 8

exit

Example:


RP/0/RP0/CPU0:router(config-if)# exit

Exits interface configuration submode for the Ethernet link bundle.

Step 9

interface {TenGigE } interface-path-id

Example:


RP/0/RP0/CPU0:router(config)# interface GigabitEthernet 1/0/0/0

Enters interface configuration mode for the specified interface.

Enter the TenGigE keyword to specify the interface type. Replace the interface-path-id argument with the node-id in the rack /slot /module format.

Step 10

bundle id bundle-id [mode {active | on | passive }]

Example:


RP/0/RP0/CPU0:router(config-if)# bundle-id 3

Adds the link to the specified bundle.

To enable active or passive LACP on the bundle, include the optional mode active or mode passive keywords in the command string.

To add the link to the bundle without LACP support, include the optional mode on keywords with the command string.

Note 
If you do not specify the mode keyword, the default mode is on ( LACP is not run over the port).
Step 11

bundle port-priority priority

Example:


RP/0/RP0/CPU0:router(config-if)# bundle port-priority 1

(Optional) If you set the bundle maximum-active links command to 1, you must also set the priority of the active link to the highest priority (lowest value) and the standby link to the second-highest priority (next lowest value). For example, you can set the priority of the active link to 1 and the standby link to 2.

Step 12

no shutdown

Example:


RP/0/RP0/CPU0:router(config-if)# no shutdown

(Optional) If a link is in the down state, bring it up. The no shutdown command returns the link to an up or down state depending on the configuration and state of the link.

Step 13

exit

Example:


RP/0/RP0/CPU0:router(config-if)# exit

Exits interface configuration submode for the Ethernet interface.

Step 14

interface {TenGigE } number

Example:


bundle id  bundle-id 
[mode  {active  
|
 passive  
|
 on }]

Example:

no shutdown

Example:

exit

Example:


RP/0/RP0/CPU0:router(config)# interface TenGigE 1/0/2/1

Example:


RP/0/RP0/CPU0:router(config-if)# bundle id 3

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# bundle port-priority 2

Example:


RP/0/RP0/CPU0:router(config-if)# no shutdown

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# exit

Example:

Example:


RP/0/RP0/CPU0:router(config)# interface TenGigE 1/0/2/3

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# bundle id 3

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# no shutdown

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# exit

(Optional) Repeat Step 8 through Step 11 to add more links to the bundle.

Step 15

Do one of the following:

  • end
  • commit

Example:


RP/0/RP0/CPU0:router(config-if)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting(yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to XR EXEC mode.
    • Entering no exits the configuration session and returns the router to XR EXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.
Step 16

exit

Example:


RP/0/RP0/CPU0:router(config-if)# exit

Exits interface configuration mode.

Step 17

exit

Example:


RP/0/RP0/CPU0:router(config)# exit

Exits XR configuration mode.

Step 18

Perform Step 1 through Step 15 on the remote end of the connection.

Brings up the other end of the link bundle.

Step 19

show bundle Bundle-Ether bundle-id

Example:


RP/0/RP0/CPU0:router# show bundle Bundle-Ether 3

(Optional) Shows information about the specified Ethernet link bundle.

Step 20

show lacp bundle Bundle-Ether bundle-id

Example:


RP/0/RP0/CPU0:router# show lacp bundle Bundle-Ether 3

(Optional) Shows detailed information about LACP ports and their peers.

Configuring EFP Load Balancing on an Ethernet Link Bundle

This section describes how to configure Ethernet flow point (EFP) Load Balancing on an Ethernet link bundle.

By default, Ethernet flow point (EFP) load balancing is enabled. However, the user can choose to configure all egressing traffic on the fixed members of a bundle to flow through the same physical member link. This configuration is available only on an Ethernet Bundle subinterface with Layer 2 transport (l2transport ) enabled.


Note
If the active members of the bundle change, the traffic for the bundle may get mapped to a different physical link that has a hash value that matches the configured value.

SUMMARY STEPS

  1. configure
  2. interface Bundle-Ether bundle-id l2transport
  3. Do one of the following:
    • bundle load-balance hash hash-value [auto ]
  4. Do one of the following:
    • end
    • commit

DETAILED STEPS

  Command or Action Purpose
Step 1

configure

Example:


RP/0/RP0/CPU0:router# configure

Enters XR configuration mode.

Step 2

interface Bundle-Ether bundle-id l2transport

Example:


RP/0/RP0/CPU0:router#(config)# interface Bundle-Ether 3 l2transport

Creates a new Ethernet link bundle with the specified bundle-id and with Layer 2 transport enabled.

The range is 1 to 65535.

Step 3

Do one of the following:

  • bundle load-balance hash hash-value [auto ]

Example:


RP/0/RP0/CPU0:router(config-subif)# bundle load-balancing hash 1

Example:

Example:


RP/0/RP0/CPU0:router(config-subif)# bundle load-balancing hash auto

Configures all egressing traffic on the fixed members of a bundle to flow through the same physical member link.

  • hash-value —Numeric value that specifies the physical member link through which all egressing traffic in this bundle will flow. The values are 1 through 8.
  • auto —The physical member link through which all egressing traffic on this bundle will flow is automatically chosen.
Step 4

Do one of the following:

  • end
  • commit

Example:


RP/0/RP0/CPU0:router(config-if)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting(yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to XR EXEC mode.
    • Entering no exits the configuration session and returns the router to XR EXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Configuring VLAN Bundles

This section describes how to configure a VLAN bundle. The creation of a VLAN bundle involves three main tasks:

  1. Create an Ethernet bundle
  2. Create VLAN subinterfaces and assign them to the Ethernet bundle.
  3. Assign Ethernet links to the Ethernet bundle.

These tasks are describe in detail in the procedure that follows.


Note
In order for a VLAN bundle to be active, you must perform the same configuration on both ends of the bundle connection.

SUMMARY STEPS

  1. configure
  2. interface Bundle-Ether bundle-id
  3. ipv4 address ipv4-address mask
  4. bundle minimum-active bandwidth kbps
  5. bundle minimum-active links links
  6. bundle maximum-active links links [hot-standby ]
  7. lacp fast-switchover
  8. exit
  9. interface Bundle-Ether bundle-id.vlan-id
  10. ipv4 address ipv4-address mask
  11. no shutdown
  12. exit
  13. Repeat Step 9 through Step 12 to add more VLANS to the bundle you created in Step 2.
  14. Do one of the following:
    • end
    • or
    • commit
  15. exit
  16. exit
  17. configure
  18. interface {TenGigE } interface-path-id
  19. bundle id bundle-id [mode {active | on | passive }]
  20. bundle port-priority priority
  21. no shutdown
  22. —
  23. Do one of the following:
    • end
    • commit
  24. Perform Step 1 through Step 23 on the remote end of the VLAN bundle connection.
  25. show bundle Bundle-Ether bundle-id
  26. show vlan interface
  27. show vlan trunks [{TenGigE | Bundle-Ether } interface-path-id ] [brief | summary ] [location node-id ]
  28. lacp fast-switchover

DETAILED STEPS

  Command or Action Purpose
Step 1

configure

Example:


RP/0/RP0/CPU0:router# configure

Enters XR configuration mode.

Step 2

interface Bundle-Ether bundle-id

Example:


RP/0/RP0/CPU0:router#(config)# interface Bundle-Ether 3

Creates and names a new Ethernet link bundle.

This interface Bundle-Ether command enters you into the interface configuration submode, where you can enter interface-specific configuration commands. Use the exit command to exit from the interface configuration submode back to the normal XR configuration mode.

Step 3

ipv4 address ipv4-address mask

Example:


RP/0/RP0/CPU0:router(config-if)# ipv4 address 10.1.2.3 255.0.0.0

Assigns an IP address and subnet mask to the virtual interface using the ipv4 address configuration subcommand.

Step 4

bundle minimum-active bandwidth kbps

Example:


RP/0/RP0/CPU0:router(config-if)# bundle minimum-active bandwidth 580000

(Optional) Sets the minimum amount of bandwidth required before a user can bring up a bundle.

Step 5

bundle minimum-active links links

Example:


RP/0/RP0/CPU0:router(config-if)# bundle minimum-active links 2

(Optional) Sets the number of active links required before you can bring up a specific bundle.

Step 6

bundle maximum-active links links [hot-standby ]

Example:


RP/0/RP0/CPU0:router(config-if)# bundle maximum-active links 1 hot-standby

(Optional) Implements 1:1 link protection for the bundle, which causes the highest-priority link in the bundle to become active and the second-highest-priority link to become the standby. Also, specifies that a switchover between active and standby LACP-enabled links is implemented per a proprietary optimization.

Note 
The priority of the active and standby links is based on the value of the bundle port-priority command.
Step 7

lacp fast-switchover

Example:


RP/0/RP0/CPU0:router(config-if)# lacp fast-switchover

(Optional) If you enabled 1:1 link protection (you set the value of the bundle maximum-active links command to 1) on a bundle with member links running LACP, you can optionally disable the wait-while timer in the LACP state machine. Disabling this timer causes a bundle member link in standby mode to expedite its normal state negotiations, thereby enabling a faster switchover from a failed active link to the standby link.

Step 8

exit

Example:


RP/0/RP0/CPU0:router(config-if)# exit

Exits the interface configuration submode.

Step 9

interface Bundle-Ether bundle-id.vlan-id

Example:


RP/0/RP0/CPU0:router#(config)# interface Bundle-Ether 3.1

Creates a new VLAN, and assigns the VLAN to the Ethernet bundle you created in Step 2.

Replace the bundle-id argument with the bundle-id you created in Step 2.

Replace the vlan-id with a subinterface identifier. Range is from 1 to 4094 inclusive (0 and 4095 are reserved).

Note 
When you include the .vlan-id argument with the interface Bundle-Ether bundle-id command, you enter subinterface configuration mode.
Step 10

ipv4 address ipv4-address mask

Example:


RP/0/RP0/CPU0:router#(config-subif)# ipv4 address 10.1.2.3/24

Assigns an IP address and subnet mask to the subinterface.

Step 11

no shutdown

Example:


RP/0/RP0/CPU0:router#(config-subif)# no shutdown

(Optional) If a link is in the down state, bring it up. The no shutdown command returns the link to an up or down state depending on the configuration and state of the link.

Step 12

exit

Example:


RP/0/RP0/CPU0:router(config-subif)# exit

Exits subinterface configuration mode for the VLAN subinterface.

Step 13

Repeat Step 9 through Step 12 to add more VLANS to the bundle you created in Step 2.

Example:

Example:

interface Bundle-Ether  bundle-id.vlan-id

Example:

dot1q vlan  vlan-id

Example:

ipv4 address  ipv4-address mask

Example:

no shutdown

Example:

exit

Example:


RP/0/RP0/CPU0:router(config-subif)# interface Bundle-Ether 3.1

Example:


RP/0/RP0/CPU0:router(config-subif)# ipv4 address   20.2.3.4/24

Example:


RP/0/RP0/CPU0:router(config-subif)# no shutdown

Example:


exit

(Optional) Adds more sub-interfaces to the bundle.

Step 14

Do one of the following:

  • end
  • or
  • commit

Example:


RP/0/RP0/CPU0:router(config-subif)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-subif)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting(yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to XR EXEC mode.
    • Entering no exits the configuration session and returns the router to XR EXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.
Step 15

exit

Example:


RP/0/RP0/CPU0:router(config-subif)# end

Exits interface configuration mode.

Step 16

exit

Example:


RP/0/RP0/CPU0:router(config)# exit

Exits XR configuration mode.

Step 17

configure

Example:


RP/0/RP0/CPU0:router # configure

Enters XR configuration mode.

Step 18

interface {TenGigE } interface-path-id

Example:


RP/0/RP0/CPU0:router(config)# interface GigabitEthernet 1/0/0/0

Enters interface configuration mode for the Ethernet interface you want to add to the Bundle.

Enter the TenGigE keyword to specify the interface type. Replace the interface-path-id argument with the node-id in the rack/slot/module format.

Note 
A VLAN bundle is not active until you add an Ethernet interface on both ends of the link bundle.
Step 19

bundle id bundle-id [mode {active | on | passive }]

Example:


RP/0/RP0/CPU0:router(config-if)# bundle-id 3

Adds an Ethernet interface to the bundle you configured in Step 2 through Step 13.

To enable active or passive LACP on the bundle, include the optional mode active or mode passive keywords in the command string.

To add the interface to the bundle without LACP support, include the optional mode on keywords with the command string.

Note 
If you do not specify the mode keyword, the default mode is on ( LACP is not run over the port).
Step 20

bundle port-priority priority

Example:


RP/0/RP0/CPU0:router(config-if)# bundle port-priority 1

(Optional) If you set the bundle maximum-active links command to 1, you must also set the priority of the active link to the highest priority (lowest value) and the standby link to the second-highest priority (next lowest value). For example, you can set the priority of the active link to 1 and the standby link to 2.

Step 21

no shutdown

Example:


RP/0/RP0/CPU0:router(config-if)# no shutdown

(Optional) If a link is in the down state, bring it up. The no shutdown command returns the link to an up or down state depending on the configuration and state of the link.

Step 22

—

Repeat Step 19 through Step 21 to add more Ethernet interfaces to the VLAN bundle.

Step 23

Do one of the following:

  • end
  • commit

Example:


RP/0/RP0/CPU0:router(config-subif)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-subif)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting(yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to XR EXEC mode.
    • Entering no exits the configuration session and returns the router toXR EXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.
Step 24

Perform Step 1 through Step 23 on the remote end of the VLAN bundle connection.

Brings up the other end of the link bundle.

Step 25

show bundle Bundle-Ether bundle-id

Example:


RP/0/RP0/CPU0:router# show bundle Bundle-Ether 3

(Optional) Shows information about the specified Ethernet link bundle.

The show bundle Bundle-Ether command displays information about the specified bundle. If your bundle has been configured properly and is carrying traffic, the State field in the show bundle Bundle-Ether command output shows the number “4,” which means the specified VLAN bundle port is “distributing.”

Step 26

show vlan interface

Example:


RP/0/RP0/CPU0:router# show vlan interface

Displays the current VLAN interface and status configuration.

Step 27

show vlan trunks [{TenGigE | Bundle-Ether } interface-path-id ] [brief | summary ] [location node-id ]

Example:


RP/0/RP0/CPU0:router# show vlan trunk summary

(Optional) Displays summary information about each of the VLAN trunk interfaces.

  • The keywords have the following meanings:
    • brief —Displays a brief summary.
    • summary —Displays a full summary.
    • location —Displays information about the VLAN trunk interface on the given slot.
    • interface —Displays information about the specified interface or subinterface.

Use the show vlan trunks command to verify that all configured VLAN subinterfaces on an Ethernet bundle are “up.”

Step 28

lacp fast-switchover

Example:


RP/0/RP0/CPU0:router(config-if)# lacp fast-switchover

(Optional) If you enabled 1:1 link protection (you set the value of the bundle maximum-active links command to 1) on a bundle with member links running LACP, you can optionally disable the wait-while timer in the LACP state machine. Disabling this timer causes a bundle member link in standby mode to expedite its normal state negotiations, thereby enabling a faster switchover from a failed active link to the standby link.

Configuring the Default LACP Short Period Time Interval

This section describes how to configure the default short period time interval for sending and receiving LACP packets on a Gigabit Ethernet interface. This procedure also enables the LACP short period.

SUMMARY STEPS

  1. configure
  2. interface GigabitEthernet interface-path
  3. bundle id number mode active
  4. lacp period short
  5. Do one of the following:
    • end
    • commit

DETAILED STEPS

  Command or Action Purpose
Step 1

configure

Example:


RP/0/RP0/CPU0:router# configure

Enters XR configuration mode.

Step 2

interface GigabitEthernet interface-path

Example:


RP/0/RP0/CPU0:router(config)# interface TenGigE 0/0/0/1

Creates a Ten Gigabit Ethernet interface and enters interface configuration mode.

Step 3

bundle id number mode active

Example:


RP/0/RP0/CPU0:router(config-if)# bundle id 1 mode active

Specifies the bundle interface and puts the member interface in active mode.

Step 4

lacp period short

Example:


RP/0/RP0/CPU0:router(config-if)# lacp period short

Configures a short period time interval for the sending and receiving of LACP packets, using the default time period of 1000 milliseconds or 1 second.

Step 5

Do one of the following:

  • end
  • commit

Example:


RP/0/RP0/CPU0:router(config-if)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-if)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting (yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to XR EXEC mode.
    • Entering no exits the configuration session and returns the router to XR EXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.

Configuring Custom LACP Short Period Time Intervals

This section describes how to configure custom short period time intervals (less than 1000 milliseconds) for sending and receiving LACP packets on a Gigabit Ethernet interface.


Note

You must always configure the transmit interval at both ends of the connection before you configure the receive interval at either end of the connection. Failure to configure the >transmit interval at both ends first results in route flapping (a route going up and down continuously). When you remove a custom LACP short period, you must do it in reverse order. You must remove the receive intervals first and then the transmit intervals.

SUMMARY STEPS

  1. configure
  2. interface Bundle-Ether bundle-id
  3. ipv4 address ipv4-address mask
  4. bundle minimum-active bandwidth kbps
  5. bundle minimum-active links links
  6. bundle maximum-active links links
  7. exit
  8. interface Bundle-Ether bundle-id.vlan-id
  9. dot1q vlan vlan-id
  10. ipv4 address ipv4-address mask
  11. no shutdown
  12. exit
  13. Repeat Step 7 through Step 12 to add more VLANs to the bundle you created in Step 2.
  14. Do one of the following:
    • end
    • commit
  15. exit
  16. exit
  17. show ethernet trunk bundle-ether instance
  18. configure
  19. interface {GigabitEthernet | TenGigE } interface-path-id
  20. bundle id bundle-id [mode {active | on | passive }]
  21. no shutdown
  22. Repeat Step 19 through Step 21 to add more Ethernet interfaces to the VLAN bundle.
  23. Do one of the following:
    • end
    • or
    • commit
  24. Perform Step 1 through Step 23 on the remote end of the VLAN bundle connection.
  25. show bundle Bundle-Ether bundle-id [reasons ]
  26. show ethernet trunk bundle-ether instance

DETAILED STEPS

  Command or Action Purpose
Step 1

configure

Example:


RP/0/RP0/CPU0:router# configure

Enters XR configuration mode.

Step 2

interface Bundle-Ether bundle-id

Example:


RP/0/RP0/CPU0:router#(config)# interface Bundle-Ether 3

Creates and names a new Ethernet link bundle.

This interface Bundle-Ether command enters you into the interface configuration submode, where you can enter interface-specific configuration commands. Use the exit command to exit from the interface configuration submode back to the normal XR configuration mode.

Step 3

ipv4 address ipv4-address mask

Example:


RP/0/RP0/CPU0:router(config-if)# ipv4 address 10.1.2.3 255.0.0.0

Assigns an IP address and subnet mask to the virtual interface using the ipv4 address configuration subcommand.

Step 4

bundle minimum-active bandwidth kbps

Example:


RP/0/RP0/CPU0:router(config-if)# bundle minimum-active bandwidth 580000

(Optional) Sets the minimum amount of bandwidth required before a user can bring up a bundle.

Step 5

bundle minimum-active links links

Example:


RP/0/RP0/CPU0:router(config-if)# bundle minimum-active links 2

(Optional) Sets the number of active links required before you can bring up a specific bundle.

Step 6

bundle maximum-active links links

Example:


RP/0/RP0/CPU0:router(config-if)# bundle maximum-active links 1

(Optional) Designates one active link and one link in standby mode that can take over immediately for a bundle if the active link fails (1:1 protection).

Note 
The default number of active links allowed in a single bundle is 8.
Note 
If the bundle maximum-active command is issued, then only the highest-priority link within the bundle is active. The priority is based on the value from the bundle port-priority command, where a lower value is a higher priority. Therefore, we recommend that you configure a higher priority on the link that you want to be the active link.
Step 7

exit

Example:


RP/0/RP0/CPU0:router(config-if)# exit

Exits the interface configuration submode.

Step 8

interface Bundle-Ether bundle-id.vlan-id

Example:


RP/0/RP0/CPU0:router#(config)# interface Bundle-Ether 3.1

Creates a new VLAN, and assigns the VLAN to the Ethernet bundle you created in Step 2.

Replace the bundle-id argument with the bundle-id you created in Step 2.

Replace the vlan-id with a subinterface identifier. Range is from 1 to 4094 inclusive (0 and 4095 are reserved).

Note 
When you include the .vlan-id argument with the interface Bundle-Ether bundle-id command, you enter subinterface configuration mode.
Step 9

dot1q vlan vlan-id

Example:


RP/0/RP0/CPU0:router#(config-subif)# dot1q vlan 10

Assigns a VLAN to the subinterface.

Replace the vlan-id argument with a subinterface identifier. Range is from 1 to 4094 inclusive (0 and 4095 are reserved).

Step 10

ipv4 address ipv4-address mask

Example:


RP/0/RP0/CPU0:router#(config-subif)# ipv4 address 10.1.2.3/24

Assigns an IP address and subnet mask to the subinterface.

Step 11

no shutdown

Example:


RP/0/RP0/CPU0:router#(config-subif)# no shutdown

(Optional) If a link is in the down state, bring it up. The no shutdown command returns the link to an up or down state depending on the configuration and state of the link.

Step 12

exit

Example:


RP/0/RP0/CPU0:router(config-subif)# exit

Exits subinterface configuration mode for the VLAN subinterface.

Step 13

Repeat Step 7 through Step 12 to add more VLANs to the bundle you created in Step 2.

(Optional) Adds more subinterfaces to the bundle.

Step 14

Do one of the following:

  • end
  • commit

Example:


RP/0/RP0/CPU0:router(config-subif)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-subif)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting(yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router toEXEC mode.
    • Entering no exits the configuration session and returns the router toEXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.
Step 15

exit

Example:


RP/0/RP0/CPU0:router(config-subif)# exit

Exits interface configuration mode.

Step 16

exit

Example:


RP/0/RP0/CPU0:router(config)# exit

Exits XR configuration mode.

Step 17

show ethernet trunk bundle-ether instance

Example:


RP/0/RP0/CPU0:router# show ethernet trunk bundle-ether 5

(Optional) Displays the interface configuration.

The Ethernet bundle instance range is from 1 through 65535.

Step 18

configure

Example:


RP/0/RP0/CPU0:router # configure

Enters XR configuration mode.

Step 19

interface {GigabitEthernet | TenGigE } interface-path-id

Example:


RP/0/RP0/CPU0:router(config)# interface TenGigE 1/0/0/0

Enters the interface configuration mode for the Ethernet interface you want to add to the Bundle.

Enter the TenGigE keyword to specify the interface type. Replace the interface-path-id argument with the node-id in the rack/slot/module format.

Note 
A VLAN bundle is not active until you add an Ethernet interface on both ends of the link bundle.
Step 20

bundle id bundle-id [mode {active | on | passive }]

Example:


RP/0/RP0/CPU0:router(config-if)# bundle-id 3

Adds an Ethernet interface to the bundle you configured in Step 2 through Step 13.

To enable active or passive LACP on the bundle, include the optional mode active or mode passive keywords in the command string.

To add the interface to the bundle without LACP support, include the optional mode on keywords with the command string.

Note 
If you do not specify the mode keyword, the default mode is on ( LACP is not run over the port).
Step 21

no shutdown

Example:


RP/0/RP0/CPU0:router(config-if)# no shutdown

(Optional) If a link is in the down state, bring it up. The no shutdown command returns the link to an up or down state depending on the configuration and state of the link.

Step 22

Repeat Step 19 through Step 21 to add more Ethernet interfaces to the VLAN bundle.

—

Step 23

Do one of the following:

  • end
  • or
  • commit

Example:


RP/0/RP0/CPU0:router(config-subif)# end

Example:

Example:


RP/0/RP0/CPU0:router(config-subif)# commit

Saves configuration changes.

  • When you issue the end command, the system prompts you to commit changes: 

Uncommitted changes found, commit them before exiting(yes/no/cancel)? 
[cancel]:
    • Entering yes saves configuration changes to the running configuration file, exits the configuration session, and returns the router to XR EXEC mode.
    • Entering no exits the configuration session and returns the router to XR EXEC mode without committing the configuration changes.
    • Entering cancel leaves the router in the current configuration session without exiting or committing the configuration changes.
  • Use the commit command to save the configuration changes to the running configuration file and remain within the configuration session.
Step 24

Perform Step 1 through Step 23 on the remote end of the VLAN bundle connection.

Brings up the other end of the link bundle.

Step 25

show bundle Bundle-Ether bundle-id [reasons ]

Example:


RP/0/RP0/CPU0:router# show bundle Bundle-Ether 3 reasons

(Optional) Shows information about the specified Ethernet link bundle.

The show bundle Bundle-Ether command displays information about the specified bundle. If your bundle has been configured properly and is carrying traffic, the State field in the show bundle Bundle-Ether command output will show the number “4,” which means the specified VLAN bundle port is “distributing.”

Step 26

show ethernet trunk bundle-ether instance

Example:


RP/0/RP0/CPU0:router# show ethernet trunk bundle-ether 5

(Optional) Displays the interface configuration.

The Ethernet bundle instance range is from 1 through 65535.

Configuration Examples for Link Bundling

This section contains the following examples:

Example: Configuring an Ethernet Link Bundle

This example shows how to join two ports to form an EtherChannel bundle running LACP: 



RP/0/RP0/CPU0:router# config
RP/0/RP0/CPU0:router(config)   #interface Bundle-Ether 3
RP/0/RP0/CPU0:router(config-if)#ipv4 address 1.2.3.4/24 
RP/0/RP0/CPU0:router(config-if)# bundle minimum-active bandwidth 620000 
RP/0/RP0/CPU0:router(config-if)# bundle minimum-active links 1 

RP/0/RP0/CPU0:router(config -if )# bundle maximum-active links 1 hot -standby 
RP/0/RP0/CPU0:router(config-if)# lacp fast-switchover
RP/0/RP0/CPU0:router(config-if)# exit
RP/0/RP0/CPU0:router(config)#interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-if)#bundle id 3 mode active
RP/0/RP0/CPU0:router(config -if )# bundle port-priority 1
RP/0/RP0/CPU0:router(config-if)# no shutdown
RP/0/RP0/CPU0:router(config)# exit
RP/0/RP0/CPU0:router(config)#interface TenGigE 0/3/0/1
RP/0/RP0/CPU0:router(config -if )#bundle id 3 mode active
RP/0/RP0/CPU0:router(config-if)# bundle  port-priority 2 
RP/0/RP0/CPU0:router(config-if)# no shutdown
RP/0/RP0/CPU0:router(config-if)# exit

Example: Configuring a VLAN Link Bundle

The following example shows how to create and bring up two VLANs on an Ethernet bundle: 


RP/0/RP0/CPU0:Router# config
RP/0/RP0/CPU0:Router(config)# interface Bundle-Ether 1
RP/0/RP0/CPU0:Router(config-if)# ipv4 address 1.2.3.4/24
RP/0/RP0/CPU0:Router(config-if)# bundle minimum-active bandwidth 620000
RP/0/RP0/CPU0:Router(config-if)# bundle minimum-active links 1
RP/0/RP0/CPU0:Router(config-if)# exit
RP/0/RP0/CPU0:Router(config)# interface Bundle-Ether 1.1
RP/0/RP0/CPU0:Router(config-subif)# dot1q vlan 10
RP/0/RP0/CPU0:Router(config-subif)# ip addr 10.2.3.4/24
RP/0/RP0/CPU0:Router(config-subif)# no shutdown
RP/0/RP0/CPU0:Router(config-subif)# exit
RP/0/RP0/CPU0:Router(config)# interface Bundle-Ether 1.2
RP/0/RP0/CPU0:Router(config-subif)# dot1q vlan 20
RP/0/RP0/CPU0:Router(config-subif)# ip addr 20.2.3.4/24
RP/0/RP0/CPU0:Router(config-subif)# no shutdown
RP/0/RP0/CPU0:Router(config-subif)# exit
RP/0/RP0/CPU0:Router(config)#interface gig 0/1/5/7
RP/0/RP0/CPU0:Router(config-if)# bundle-id 1 mode act
RP/0/RP0/CPU0:Router(config-if)# commit
RP/0/RP0/CPU0:Router(config-if)# exit
RP/0/RP0/CPU0:Router(config)# exit
RP/0/RP0/CPU0:Router # show vlan trunks

Example: Configuring EFP Load Balancing on an Ethernet Link Bundle

The following example shows how to configure all egressing traffic on the fixed members of a bundle to flow through the same physical member link automatically. 


RP/0/RP0/CPU0:router# configuration terminal 
RP/0/RP0/CPU0:router(config)# interface bundle-ether 1.1 l2transport
RP/0/RP0/CPU0:router(config-subif)# bundle load-balancing hash auto
RP/0/RP0/CPU0:router(config-subif)#

The following example shows how to configure all egressing traffic on the fixed members of a bundle to flow through a specified physical member link. 


RP/0/RP0/CPU0:router# configuration terminal 
RP/0/RP0/CPU0:router(config)# interface bundle-ether 1.1 l2transport
RP/0/RP0/CPU0:router(config-subif)# bundle load-balancing hash 1
RP/0/RP0/CPU0:router(config-subif)#

Examples: Configuring LACP Short Periods

The following example shows how to configure the LACP short period time interval to the default time of 1000 milliseconds (1 second): 


config
interface TenGigE 0/1/0/1
bundle id 1 mode active
lacp period short
commit

The following example shows how to configure custom LACP short period transmit and receive intervals to less than the default of 1000 milliseconds (1 second):

Router A


config
interface TenGigE 0/1/0/1
bundle id 1 mode active
lacp period short
commit

Router B


config
interface TenGigE 0/1/0/1
bundle id 1 mode active
lacp period short
commit

Router A


config
interface TenGigE 0/1/0/1
lacp period short transmit 100
commit

Router B


config
interface TenGigE 0/1/0/1
lacp period short transmit 100
commit

Router A


config
interface TenGigE 0/1/0/1
lacp period short receive 100
commit

Router B


config
interface TenGigE 0/1/0/1
lacp period short receive 100
commit

Additional References

These sections provide references related to link bundle configuration.

Related Documents

Standards

Standards

Title

IEEE 802.3ad (incorporated as Annex 43 into 802.3-2002)

—

MIBs

MIBs

MIBs Link

The IEEE-defined MIB for Link Aggregation (defined in 802.3 Annex 30C)

To locate and download MIBs for selected platforms using Cisco IOS XR Software, use the Cisco MIB Locator found at the following URL: http://cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml

RFCs

RFCs

Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—

Technical Assistance

Description

Link

The Cisco Technical Support website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport