Carrier Ethernet Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 900 Series)
Configuring Microwave 1+1 Hot Standby Protocol on the Cisco ASR 903 Series Router
Downloads: This chapterpdf (PDF - 1.37MB) The complete bookPDF (PDF - 5.19MB) | The complete bookePub (ePub - 954.0KB) | The complete bookMobi (Mobi - 3.13MB) | Feedback

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

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

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).

Figure below shows a sample physical topology for HSBY using two ODUs (active and standby) and one IDU.

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.


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.

Figure below provides a logical view of the maintenance associations used in this HSBY topology.

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 {mac-address domain-number | dns dns-name | 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 {mac-address domain-number | dns dns-name | 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.    ethernet cfm mep domain domain-name mpid mpid {port | vlan vlan-id}

    23.    link-protection group group-number

    24.    exit

    25.    show ethernet cfm maintenance-points remote detail


DETAILED STEPS
 Command or ActionPurpose
Step 1 enable


Example:
Router> enable
 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2configure terminal


Example:
Router# configure terminal
 

Enter global configuration mode.

 
Step 3ethernet cfm global


Example:

Router(config)# ethernet cfm global

 

Enables Ethernet CFM globally.

 
Step 4link-protection enable


Example:

Router(config)# link-protection enable

 

Enables link protection globally on the router.

 
Step 5link-protection group management vlan vlan-id


Example:

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

 

Defines the management VLAN used for link protection.

 
Step 6link-protection suspend-interval interval interval


Example:

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

 

Sets a link protection suspend interval.

 
Step 7link-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 8ethernet 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 9id {mac-address domain-number | dns dns-name | null}


Example:

Router(config-ecfm)# id null

 

Configures a maintenance domain identifier (MDID).

 
Step 10service {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 11mep mpid mpid


Example:

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

 

Defines the remote MEP ID.

 
Step 12continuity-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 13exit


Example:

Router(config-ecfm-srv)# exit
 

Exits Ethernet CFM service instance configuration mode.

 
Step 14exit


Example:
Router(config-ecfm)# exit
 

Exits Ethernet CFM configuration mode.

 
Step 15ethernet 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 16id {mac-address domain-number | dns dns-name | null}


Example:
Router(config-ecfm)# id null
 

Configures a maintenance domain identifier (MDID).

 
Step 17interface interface-id


Example:
Router(config)# interface gigabitethernet0/0/1
 

Specify the port to attach to the policy map, and enter interface configuration mode. Valid interfaces are physical ports.

 
Step 18spanning-tree portfast {disable | trunk}


Example:

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

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

 
Step 19service 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 20encapsulation {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 21bridge-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 22ethernet 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 23link-protection group group-number


Example:

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

Configures a link-protection group for ODU 2.

 
Step 24exit


Example:

Router(config-if)# exit
 

Exits interface configuration mode.

 
Step 25show 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.

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
ethernet 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
ethernet 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