• Example: Configuring Ethernet CFM over VPLS on page 105
• Example: Configuring Ethernet CFM on Physical Interfaces on page 116
Example: Configuring Ethernet CFM on Physical Interfaces
CFM can be used to monitor the physical link between two routers. This functionality is
similar to that supported by the IEEE 802.3ah LFM protocol.
In Junos OS Release 9.3 and later, CFM also supports aggregated Ethernet interfaces.
On interfaces configured on Modular Port Concentrators (MPCs) and Modular Interface
Cards (MICs) on MX Series routers, CFM is not supported on untagged aggregated Ethernet
member links. MPCs and MICs do support CFM on untagged and tagged aggregated
Ethernet logical interfaces.
NOTE: The configurations in this example are only partial examples of
complete and functional router configurations. Do not copy these
configurations and use them directly on an actual system.
In the following example, two routers (Router 1 and Router 2) are connected by a
point-to-point Gigabit Ethernet link. The link between these two routers is monitored
using CFM. This is shown in Figure 17 on page 116. The single boundary is a “down mep”
in CFM terminology.
Figure 17: Ethernet CFM on Physical Interfaces
Router 1 Configure the interface and CFM:
[edit]
interfaces ge-1/0/1 {
unit 0 {
family inet;
}
}
protocols {
oam {
ethernet {
connectivity-fault-management {
maintenance-domain private {
level 0;
maintenance-association private-ma {
continuity-check {
interval 1s;
}
Copyright © 2012, Juniper Networks, Inc.116
Junos OS 12.1 MX Series 3D Universal Edge Routers Solutions Guide
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