Specifications

15-27
Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Software Configuration Guide, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter 15 Configuring Ethernet OAM, CFM, and E-LMI
Configuring Y.1731 Fault Management
When a MEP receives a valid LBM frame, it generates an LB reply frame and sends it to the requested
MEP after a random delay in the range of 0 to 1 second. The validity of the frame is determined on its
having the correct MEG level.
When a MEP sends a multicast LBM frame and receives an LB reply frame within 5 seconds, the LB
reply frame is valid.
Configuring Y.1731 Fault Management
To configure Y.1731 fault management, you must enable CFM and configure MIPs on the participating
interfaces. AIS messages are generated only on interfaces with a configured MIP.
• Default Y.1731 Configuration, page 15-27
• Configuring ETH-AIS, page 15-27
• Using Multicast Ethernet Loopback, page 15-29
Default Y.1731 Configuration
ETH-AIS is enabled by default when CFM is enabled.
When you configure ETH-AIS, you must configure CFM before ETH-AIS is operational.
ETH-RDI is set automatically when continuity check messages are enabled.
Configuring ETH-AIS
Beginning in privileged EXEC mode, follow these steps to configure Ethernet AIS on the router:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ethernet cfm ais link-status global Configure AIS-specific SMEP commands by entering
config-ais-link-cfm mode.
Step 3
level level-id
or
disable
Configure the maintenance level for sending AIS frames
transmitted by the SMEP. The range is 0 to 7.
or
Disable generation of ETH-AIS frames.
Step 4
period value Configure the SMEP AIS transmission period interval.
Allowable values are 1 second or 60 seconds.
Step 5
exit Return to global configuration mode.
Step 6
ethernet cfm domain domain-name level level-id Define a CFM domain, set the domain level, and enter
ethernet-cfm configuration mode for the domain. The
maintenance level number range is 0 to 7.