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10-7
Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 10 Configuring Ethernet OAM
Configuring Multi-UNI CFM MEPs in the Same VPN
Effective with Cisco IOS Release 15.3(2)S, services are configured such that two or more bridge
domains (BDs) are used to achieve UNI isolation and backhauling towards provider edge (PE) device.
Local MEPs (with up direction) need to be configured on the UNIs (with the associated BDs) to monitor
the service backhaul connection. To achieve this, use the alias command to configure a CFM MA, MA2,
as an alias to another MA, MA1. As a result, MA1 behaves as though it is configured as MA2 on a
different Bridge Domain (BD) associated with it. MA1 and MA2 function as if they are part of the same
service, thus associating the same CFM MA to two different BDs and UNI isolation.
Figure 10-1 shows the configuring Mutli-NNI CFM in the same VPN.
Figure 10-1 Configuring Multi-NNI CFM in the Same VPN
Restrictions:
• Two MAs can be configured such that MA2 connected with different BD will act as a proxy (alias)
for MA1 only for the MEPs which have the service direction as Up.
• Y1731-PM is not supported with Multi-NNI CFM.
Complete these steps to configure Multi-UNI CFM MEPs in the same VPN.
SUMMARY STEPS
1. configure terminal
2. ethernet cfm global
3. ethernet cfm domain domain-name level level-id
4. service {ma-name | ma-number | vpn-id vpn} {vlan vlan-id [direction down] | port}
5. continuity-check
6. continuity-check interval value
7. continuity-check loss-threshold threshold-value
8. alias{alias-short-ma-name | icc icc-code meg-id | number ma-number | vlan-id vlan-id | vpn-id
vpn-id}
9. exit