67-4
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
OL_28731-01
Chapter 67 Configuring Y.1731 (AIS and RDI)
Configuring Y.1731
Figure 67-1 Generating and Propagating AIS Messages Upon a Defect (Link Fail)
Configuring Y.1731
Note Y.1731 is enabled by default.
These sections are included:
• Y.1731 Configuration Guidelines, page 67-4
• Configuring AIS Parameters, page 67-5
• Clearing MEP from the AIS Defect Condition, page 67-6
• Clearing SMEP from the AIS Defect Condition, page 67-6
Y.1731 Configuration Guidelines
Configuration guidelines and restrictions for Y.1731 include the following:
• Because of STP’s restoration capability, do not expect ETH-AIS to be applied in the STP
environments.
• AIS is enabled by default on a CFM maintenance domain. The following section illustrates the
commands you can use to disable AIS on a maintenance domain. Likewise, RDI is a flag bit in the
CC message. Provided CC transmission is enabled, the present RDI flag of the CC message is set to
true or false.
Customer
Equipment
Operator A Bridges Operator B Bridges
Customer
Equipment
280624
MM MM
MM
MM
MMMMMMM
MM
MM
LLLLL
LLLLLLLLLLLMMMMMM
LLLLLLLL LLLLLLLL
MMMMM MMMMM MMMMM MMMMM MMMMM MMMMM MM
= Maintenance End Point
= Maintenance Intermediate Point
= AIS
= CC with RDI
MM
LL
7
4
3
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