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Example: Configuring Ethernet LFM with Loopback Support

In this example, LFM is configured between provider edge (PE) router and the customer edge (CE) router. The PE router can put the CE router in remote loopback mode. This allows the PE to have all the traffic sent to the CE router looped back for diagnostics purposes, as shown in Figure 1.

Figure 1: Ethernet LFM with Loopback Support

Ethernet LFM with Loopback Support

To configure LFM between a PE router and a CE router:

  1. Configure LFM loopback on the PE router:

    [edit]
    interfaces ge-1/0/0 {unit 0 {family inet {address 11.11.11.1/24;}}}
    protocols {oam {ethernet {link-fault-management {interface ge-1/0/0 {pdu-interval 1000;pdu-threshold 5;remote-loopback;}}}}}

  2. Configure LFM loopback on the CE router:

    [edit]
    interfaces ge-1/1/0 {unit 0 {family inet {address 11.11.11.2/24;}}}
    protocols {oam {ethernet {link-fault-management {interface ge-1/1/0 {pdu-interval 1000;pdu-threshold 5;negotiation-options {allow-remote-loopback;}}}}}}

    Note: If the negotiation options allow-remote-loopback statement on the CE router is deleted before removing the CE router from remote loopback mode, traffic flow between the PE router and CE router is affected. Hence, delete the remote-loopback statement on the PE router before deleting the negotiation-options allow-remote-loopback statement on the CE router.

 

Related Documentation

 

Published: 2013-07-31

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