In this example, LFM is enabled on an IP link between the provider edge (PE) and customer edge (CE) interfaces. If the link goes down, the fault will be detected by LFM and the interfaces on both sides will be marked Link-Layer-Down. This results in notifications to various subsystems (for example, routing) which will take appropriate action. The link running LFM is shown in Figure 13.
Figure 13: Ethernet LFM Between PE and CE
PE Router
Configure LFM on the PE router:
- [edit]
- interfaces ge-1/1/0 {
-
- unit 0 {
-
- family inet {
- address 11.11.11.1/24;
- }
- }
- }
- protocols {
-
- oam {
-
- ethernet {
-
- link-fault-management {
-
- interface ge-1/1/0 {
- pdu-interval 1000;
- pdu-threshold 5;
- }
- }
- }
- }
- }
CE Router
Configure LFM 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;
- }
- }
- }
- }
- }
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