Allied Telesis IE340 Series User Manual

C613-50631-01 Rev A Command Reference for IE340 Series 356
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
CONNECTIVITY FAULT MANAGEMENT COMMANDS
CC
INTERVAL
cc interval
Overview Use this command to set the CCM Interval.
Syntax
cc ma-name <ma-name> interval <interval>
Default The default interval is 4 (1 second).
Mode Ethernet CFM Configuration
Usage notes Continuity Checks is another term for connectivity fault detection. This makes use
of Continuity Check Messages (CCMs) that are periodically sent by an MEP
(multicast or unicast) and received by other MEP(s). CCMs can be used to detect
connectivity faults across a link (using Link Level MEPs) or across a segment of a
VLAN using VLAN aware MEPs, both of which are used within an MD/MA. CCMs are
sent periodically at a given rate (or frame interval) that is agreed upon by all the
MEPs in the MA. The faster the rate, the more quickly faults can be detected.
If an MEP does not receive a CCM within 3.5 times the expected interval from a peer
MEP(s), that MEP declares a connectivity fault. This is known as a “defect”. Upon
detecting a defect, the detecting MEP will also set the Remote Defect Indicator
(RDI) bit for its outgoing CCM messages to its peer MEP(s) so as to notify the peer
MEPs that a defect has been detected. If the defect persists long enough (generally
2.5 seconds), then an “alarm” is declared. If an alarm is declared, then the defect has
to abate long enough (generally 10 seconds) for the alarm to clear.
Example To set the CCM interval of a Maintenance Association named “MA-INST2-1” to the
value of “4”, use the commands:
awplus(config)# ethernet cfm domain-name MD-INST2
awplus(config-ether-cfm)# cc ma-name MA-INST2-1 interval 4
Related
commands
ethernet cfm domain-name
Parameter Description
ma-name Specify the Maintenance Association for which the Interval is
used.
<ma-name> Specify the Maintenance Association's CLI instance name.
interval Specify the CCM Interval.
<interval> Specify the CCM Interval (CCI), using one of the following: 
1 - CCI of 3 milliseconds (currently not supported) 
2 - CCI of 10 milliseconds (currently not supported) 
3 - CCI of 100 milliseconds 
4 - CCI of 1 second 
5 - CCI of 10 seconds 
6 - CCI of 1 minute 
7 - CCI of 10 minutes.

Allied Telesis IE340 Series Specifications

General

Brand	Allied Telesis
Model	IE340 Series
Category	Switch
Language	English