Configuring Microwave 1+1 Hot Standby Protocol on the Cisco ASR 903 Series Router


Note
This chapter is not applicable for Cisco ASR 900 RSP3 Module.

The following sections describe the Microwave 1+1 Hot Standby (HSBY) Protocol:

Overview of Microwave 1+1 Hot Standby Protocol

Microwave 1+1 Hot Standby Protocol (HSBY) is a link protection protocol developed by Nokia Siemens Networks. HSBY extends the functionality of CFM Continuity Check messages to enable detection and handling of hardware failures in microwave devices in order to provide redundancy. HSBY provides link protection support for indoor units (IDUs) and outdoor units (ODUs).

Suspending Continuity Check Messages

Under some circumstances such as a software upgrade or a device reload, it is necessary to temporarily suspend continuity check messages between the ODU and IDU in order to prevent unnecessary link protection action such as a failover. In this case, the ODU sets a suspend flag within the continuity check messages sent to the IDU indicating the amount of time until continuity check messages resume. The IDU resumes exchanging continuity check messages with the ODU after the suspend interval has passed or after the ODU recovers sends a continuity check message.


Note

While the Cisco ASR 903 Series Router processes continuity check suspend messages from the IDU, configuration of continuity check messages on the Cisco ASR 903 Series Router is not supported.

Restrictions for CFM CCM Extensions to Support the NSN Microwave 1+1 HSBY Protocol

  • To enable link-protection on a maintenance endpoint (MEP), the connectivity fault management (CFM) domain and MEP must adhere to the Nokia Siemens Networks (NSN) configuration requirements.

NSN Microwave 1+1 HSBY and CFM Integration

Monitoring Devices and Suspending CFM Traffic

The NSN Microwave 1+1 HSBY Protocol has specified a proprietary time-to-live (TLV) field in CCMs for monitoring active and standby ODUs, and a flag to temporarily suspend CCM monitoring. Identified by an Organizational Unique Identifier (OUI) value of 0x000FBB, the TLV is attached to CCMs as an organization-specific TLV.

An IDU or an ODU may need to temporarily halt transmitting traffic, including CCMs, in circumstances such as a software upgrade or a reload. An IDU or ODUs can set the Suspend CC Monitor flag to signal a temporary pause in CFM traffic if a suspension is needed. Using this flag prevents the other two devices from triggering an unnecessary link-protection action. The Suspend CC Monitor time interval field, in conjunction with the flag, indicates the maximum amount of time the two devices must wait before expecting CCMs to resume from the suspended device.

HSBY Maintenance Associations

HSBY protocol uses two types of CFM continuity check messages:

  • E–CCM—An IDU-to-ODU continuity check message that functions at Ethernet CFM domain level 0. There are two active E–CCM sessions when HSBY is configured.

  • P–CCM—An ODU-to-ODU continuity check message that functions at Ethernet CFM domain level 4.


Note

The IDU is only associated with the E–CCM sessions; it has outward-facing MEPs configured for each session.

Thus, the HSBY configuration shown in figure below consists of five separate traffic flows:

  • CFM traffic between the IDU and ODU 1

  • CFM traffic between the IDU and the ODU 2

  • CFM traffic between ODU 1 and ODU 2. This traffic passes through IDU.

  • Data traffic between the WAN and ODU 1. This traffic passes through the IDU.

Configuring Microwave 1+1 Hot Standby Protocol

The following sections describe how to configure Microwave 1+1 Hot Standby Protocol (HSBY) on the Cisco ASR 903 Series Router.

Configuring ODU Values

HSBY protocol specifies that some values on the ODU are configurable while others utilize fixed values. Table below summarizes the permitted values for an ODU using HSBY protocol.

Table 1. HSBY ODU Configuration Parameters Summary

Parameter

Default Value

Permitted Values

Short MA Name

Learned

0–65535

MPID

2

Fixed

MA VLAN-ID (P-CCM)

None

16–50

Configuring IDU Values

HSBY protocol specifies that some values on the IDU are configurable while others utilize fixed values. Table below summarizes the permitted values for an IDU using HSBY protocol.

Table 2. HSBY IDU Configuration Parameters Summary

Parameter

Default Value

Permitted Values

CC Interval

100 ms

10 ms, 100 ms, and 1000 ms

Domain Level

0

Fixed

Domain Name

Null

Fixed

MA VLAN-ID (E-CCM)

None

1–15

MPID

1

Fixed

Short MA Name

None

0–65535

Suspend Interval

160 seconds

80 s, 160 s, 240 s, and 320 s

Configuring HSBY

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. ethernet cfm global
  4. link-protection enable
  5. link-protection group management vlan vlan-id
  6. link-protection suspend-interval interval interval
  7. link-protection group group-number pccm vlan vlan-id
  8. ethernet cfm domain domain-name level level-id [direction outward]
  9. id null
  10. service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id} [port | vlan vlan-id [direction down]]
  11. mep mpid mpid
  12. continuity-check [interval time | loss-threshold threshold | static rmep]
  13. exit
  14. exit
  15. ethernet cfm domain domain-name level level-id [direction outward]
  16. id null
  17. interface interface-id
  18. spanning-tree portfast {disable | trunk}
  19. service instance number ethernet [name]
  20. encapsulation {default | dot1q | priority-tagged | untagged}
  21. bridge-domain bridge-id [split-horizon group group-id]
  22. cfm mep domain domain-name mpid mpid
  23. link-protection group group-number
  24. exit
  25. show ethernet cfm maintenance-points remote detail

DETAILED STEPS

  Command or Action Purpose
Step 1

enable

Example:

Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

Example:

Router# configure terminal

Enter global configuration mode.

Step 3

ethernet cfm global

Example:


Router(config)# ethernet cfm global

Enables Ethernet CFM globally.

Step 4

link-protection enable

Example:


Router(config)# link-protection enable

Enables link protection globally on the router.

Step 5

link-protection group management vlan vlan-id

Example:


Router(config)# link-protection group management vlan 51

Defines the management VLAN used for link protection.

Step 6

link-protection suspend-interval interval interval

Example:


Router(config)# link-protection suspend-interval 320

Sets a link protection suspend interval.

Step 7

link-protection group group-number pccm vlan vlan-id

Example:


Router(config)# link-protection group 2 pccm vlan 16

Specifies an ODU-to-ODU continuity check message (P-CCM) VLAN.

Step 8

ethernet cfm domain domain-name level level-id [direction outward]

Example:


Router(config)# ethernet cfm domain eccm1 level 0

Configures the CFM domain for ODU 1 and enters Ethernet CFM configuration mode.

Step 9

id null

Example:


Router(config-ecfm)# id null

Configures a maintenance domain identifier (MDID).

Step 10

service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id} [port | vlan vlan-id [direction down]]

Example:


Router(config-ecfm)# service 1 vlan 14 direction down

Defines a maintenance association for ODU 1 and enters Ethernet CFM service instance configuration mode.

Step 11

mep mpid mpid

Example:


Router(config-ecfm-srv)# mep mpid 1

Defines the remote MEP ID.

Step 12

continuity-check [interval time | loss-threshold threshold | static rmep]

Example:


Router(config-ecfm-srv)# continuity-check interval 100ms

Enables transmission of continuity check messages (CCMs) within the ODU 1 maintenance association and defines a continuity-check interval.

Step 13

exit

Example:


Router(config-ecfm-srv)# exit

Exits Ethernet CFM service instance configuration mode.

Step 14

exit

Example:


Router(config-ecfm)# exit

Exits Ethernet CFM configuration mode.

Step 15

ethernet cfm domain domain-name level level-id [direction outward]

Example:


Router(config)# ethernet cfm domain eccm2 level 0

Configures the CFM domain for ODU 2 and enters CFM configuration mode.

Step 16

id null

Example:


Router(config-ecfm)# id null

Configures a maintenance domain identifier (MDID).

Step 17

interface interface-id

Example:

Router(config)# interface gigabitethernet0/0/1

Enter interface configuration mode. Valid interfaces are physical ports.

Step 18

spanning-tree portfast {disable | trunk}

Example:


Router(config-if)# spanning-tree portfast trunk

Enables PortFast on the interface when it is in trunk mode.

Step 19

service instance number ethernet [name]

Example:

Router(config-if)# service instance 1 Ethernet

Configure an EFP (service instance) and enter service instance configuration) mode.

  • The number is the EFP identifier, an integer from 1 to 4000.

  • (Optional) ethernet name is the name of a previously configured EVC. You do not need to use an EVC name in a service instance.

Step 20

encapsulation {default | dot1q | priority-tagged | untagged}

Example:

Router(config-if-srv)# encapsulation dot1q 10

Configure encapsulation type for the service instance.

  • default —Configure to match all unmatched packets.

  • dot1q —Configure 802.1Q encapsulation. See Table 1 for details about options for this keyword.

  • priority-tagged —Specify priority-tagged frames, VLAN-ID 0 and CoS value of 0 to 7.

  • untagged —Map to untagged VLANs. Only one EFP per port can have untagged encapsulation.

Step 21

bridge-domain bridge-id [split-horizon group group-id]

Example:

Router(config-if-srv)# bridge-domain 3000

Configure the bridge domain ID. The range is from 1 to 4000.

You can use the split-horizon keyword to configure the port as a member of a split horizon group. The group-id range is from 0 to 2.

Step 22

cfm mep domain domain-name mpid mpid

Example:


Router(config-if)# cfm mep domain eccm1 mpid 1

Configures a CFM MEP domain for ODU 1.

Step 23

link-protection group group-number

Example:


Router(config-if)# link-protection group 1

Configures a link-protection group for ODU 2.

Step 24

exit

Example:


Router(config-if)# exit

Exits interface configuration mode.

Step 25

show ethernet cfm maintenance-points remote detail

Example:


Router# show ethernet cfm maintenance-points remote detail

(Optional) Displays remote maintenance endpoints in the continuity check database.

Configuring NSN Microwave 1+1 HSBY Protocol and CFM CCM Extensions

SUMMARY STEPS

  1. enable
  2. configure terminal
  3. ethernet cfm global
  4. link-protection enable
  5. link-protection group management vlan vlan-id
  6. link-protection group group-number pccm vlan vlan-id
  7. ethernet cfm domain domain-name level level-id [direction outward ]
  8. id {mac-address domain-number | dns dns-name | null }
  9. service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id } [port | vlan vlan-id [direction down ]]
  10. continuity-check [interval time | loss-threshold threshold | static rmep ]
  11. exit
  12. exit
  13. ethernet cfm domain domain-name level level-id [direction outward ]
  14. id {mac-address domain-number | dns dns-name | null }
  15. service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id } [port | vlan vlan-id [direction down ]]
  16. continuity-check [interval time | loss-threshold threshold | static rmep ]
  17. exit
  18. exit
  19. interface type slot / port
  20. spanning-tree portfast {disable | trunk }
  21. cfm mep domain domain-name mpid mpid {port | vlan vlan-id }
  22. link-protection group group-number
  23. exit
  24. interface type slot / port
  25. spanning-tree portfast {disable | trunk }
  26. cfm mep domain domain-name mpid mpid {port | vlan vlan-id }
  27. link-protection group group-number
  28. end
  29. service instance trunk id ethernet
  30. encapsulation dot1q vlan-id [, vlan-id [- vlan-d]]
  31. rewrite ingress tag pop 1 symmetric
  32. bridge-domain from-encapsulation
  33. show ethernet cfm maintenance-points remote detail

DETAILED STEPS

  Command or Action Purpose
Step 1

enable

Example:


Router> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

Example:


Router# configure terminal

Enters global configuration mode.

Step 3

ethernet cfm global

Example:


Router(config)# ethernet cfm global

Enables Ethernet CFM globally.

Step 4

link-protection enable

Example:


Router(config)# link-protection enable

Enables link protection globally on the router.

Step 5

link-protection group management vlan vlan-id

Example:


Router(config)# link-protection group management vlan 51

Defines the management VLAN used for link protection.

Step 6

link-protection group group-number pccm vlan vlan-id

Example:


Router(config)# link-protection group 2 pccm vlan 16

Specifies an ODU-to-ODU continuity check message (P-CCM) VLAN.

Step 7

ethernet cfm domain domain-name level level-id [direction outward ]

Example:


Router(config)# ethernet cfm domain eccm1 level 0

Configures the CFM domain for ODU 1 and enters Ethernet CFM configuration mode.

Step 8

id {mac-address domain-number | dns dns-name | null }

Example:


Router(config-ecfm)# id null

Configures a maintenance domain identifier (MDID).

Step 9

service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id } [port | vlan vlan-id [direction down ]]

Example:


Router(config-ecfm)# service 1 vlan 14 direction down

Defines a maintenance association for ODU 1 and enters Ethernet CFM service instance configuration mode.

Step 10

continuity-check [interval time | loss-threshold threshold | static rmep ]

Example:


Router(config-ecfm-srv)# continuity-check interval 100ms

Enables transmission of continuity check messages (CCMs) within the ODU 1 maintenance association and defines a continuity-check interval.

Step 11

exit

Example:


Router(config-ecfm-srv)# exit

Exits Ethernet CFM service instance configuration mode.

Step 12

exit

Example:


Router(config-ecfm)# exit

Exits Ethernet CFM configuration mode.

Step 13

ethernet cfm domain domain-name level level-id [direction outward ]

Example:


Router(config)# ethernet cfm domain eccm2 level 0

Configures the CFM domain for ODU 2 and enters CFM configuration mode.

Step 14

id {mac-address domain-number | dns dns-name | null }

Example:


Router(config-ecfm)# id null

Configures a maintenance domain identifier (MDID).

Step 15

service {ma-name | ma-num | vlan-id vlan-id | vpn-id vpn-id } [port | vlan vlan-id [direction down ]]

Example:


Router(config-ecfm)# service 2 vlan 15 direction down

Defines a maintenance association for ODU 2 and enters Ethernet CFM service configuration mode.

Step 16

continuity-check [interval time | loss-threshold threshold | static rmep ]

Example:


Router(config-ecfm-srv)# continuity-check interval 100ms

Enables transmission of CCMs within the ODU 2 maintenance association and defines a continuity-check interval.

Step 17

exit

Example:


Router(config-ecfm-srv)# exit

Exits Ethernet CFM service instance configuration mode.

Step 18

exit

Example:


Router(config-ecfm)# exit

Exits Ethernet CFM configuration mode.

Step 19

interface type slot / port

Example:


Router(config)# interface gigabitethernet 1/1

Configures the interface to be connected to ODU 1 and enters interface configuration mode.

Step 20

spanning-tree portfast {disable | trunk }

Example:


Router(config-if)# spanning-tree portfast trunk

Enables PortFast on the interface when it is in trunk mode.

Step 21

cfm mep domain domain-name mpid mpid {port | vlan vlan-id }

Example:


Router(config-if)# ethernet cfm mep domain eccm1 mpid 1 vlan 14

Configures a CFM MEP domain for ODU 1.

Step 22

link-protection group group-number

Example:


Router(config-if)# link-protection group 1

Configures a link-protection group for ODU 2.

Step 23

exit

Example:


Router(config-if)# exit

Exits interface configuration mode.

Step 24

interface type slot / port

Example:


Router(config)# interface GigabitEthernet 3/2

Configures the interface to be connected to ODU 2 and enters interface configuration mode.

Step 25

spanning-tree portfast {disable | trunk }

Example:


Router(config-if)# spanning-tree portfast trunk

Enables PortFast on the interface when it is in trunk mode.

Step 26

cfm mep domain domain-name mpid mpid {port | vlan vlan-id }

Example:


Router(config-if)# ethernet cfm mep domain eccm2 mpid 1 vlan 15

Configures a CFM MEP domain for ODU 2.

Step 27

link-protection group group-number

Example:


Router(config-if)# link-protection group 1

Configures a link-protection group for ODU 2.

Step 28

end

Example:


Router(config-if)# end

Returns the CLI to privileged EXEC mode.

Step 29

service instance trunk id ethernet

Example:


Router(config-if)# service instance trunk 1 ethernet

Configures an Ethernet service instance on an interface and enters Ethernet service configuration mode.

Step 30

encapsulation dot1q vlan-id [, vlan-id [- vlan-d]]

Example:


Device(config-if-srv)# encapsulation dot1q 1-5, 7, 9-12

Defines the matching criteria to map 802.1Q frames ingress on an interface to the appropriate service instance.

Step 31

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 that is entering a service instance.

Step 32

bridge-domain from-encapsulation

Example:


Device(config-if-srv)# bridge-domain from-encapsulation

Creates a list of bridge domains for an EFP trunk port using the bridge-domain IDs derived from the encapsulation VLAN numbers.

Step 33

show ethernet cfm maintenance-points remote detail

Example:


Router# show ethernet cfm maintenance-points remote detail

(Optional) Displays remote maintenance endpoints in the continuity check database.

Configuration Examples

This section contains configuration examples for HSBY protocol.

CFM Domain and MEP Configuration

This example is a sample CFM domain and MEP configuration that follows the NSN requirements for monitoring ODUs. The link-protection command for configuring NSN-specific parameters is included. CFM configuration parameters for an IDU are shown within angle brackets (<>): 


link-protection suspend-interval <80s, 160s, 240s, 320s>
link-protection management vlan <51-4094>
link-protection pccm vlan <16-50>
!
ethernet cfm ieee
ethernet cfm global
!
ethernet cfm domain <Domain for ODU1> level 0
 id null
 service number <number> vlan <1-15> direction down
 continuity-check
 continuity-check interval <10, 100, 1000ms>
!
ethernet cfm domain <Domain for ODU2> level 0
 id null
 service number <number> vlan <1-15> direction down
  continuity-check
  continuity-check interval <10, 100, 1000ms>
!
interface GigabitEthernet 0/3
 ethernet cfm mep domain <Domain for ODU1> mpid 1 vlan <1-15>
   link-protection group <group #>
!
interface GigabitEthernet 0/4
 ethernet cfm mep domain <Domain for ODU2> mpid 1 vlan <1-15>
   link-protection group <group #>
!

HSBY Sample Configuration

The following configuration example shows how to configure HSBY. This example uses EVC interfaces, which are the only supported interfaces for HSBY on the Cisco ASR 903 Series Router. 


!
link-protection enable
link-protection suspend-interval 320
link-protection group 1
link-protection management-vlan 500
!
ethernet cfm ieee
ethernet cfm global
!
ethernet cfm domain ECCM1 level 0
 id null
 service number 1 evc EVCODU1 vlan 10 direction down
  continuity-check
  continuity-check interval 10ms
!
ethernet cfm domain ECCM2 level 0
 id null
 service number 1 evc EVCODU2 vlan 11 direction down
  continuity-check
  continuity-check interval 10ms
!
!
interface GigabitEthernet0/0/1
spanning-tree portfast trunk
service instance 1 ethernet EVCODU1
description ODU1-ECCM-EVC
encapsulation dot1q 10
bridge-domain 10
 cfm mep domain ECCM1 mpid 100 vlan 10
  link-protection group 1
!
service instance 2 ethernet
description ODU1-Management-Vlan
encapsulation dot1q 500
bridge-domain 500
!
service instance trunk 3 ethernet
description ODU1-Data-Vlan
encapsulation dot1q 100-200
bridge-domain from-encapsulation
!
!
interface GigabitEthernet0/0/2
spanning-tree portfast trunk
service instance 2 ethernet EVCODU2
description ODU2-ECCM-EVC
encapsulation dot1q 10
bridge-domain 10
 cfm mep domain ECCM2 mpid 100 vlan 11
  link-protection group 1
!
service instance 2 ethernet
description ODU1-Management-Vlan
encapsulation dot1q 500
bridge-domain 500
!
service instance trunk 3 ethernet
description ODU1-Data-Vlan
encapsulation dot1q 100-200
rewrite ingress tag pop 1 symmetric
bridge-domain from-encapsulation