CLI Reference Guide-R04

Chapter 21 | ERPS Commands
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Command Usage
In order to coordinate timing of protection switches at multiple layers, a hold-off
timer may be required. Its purpose is to allow, for example, a server layer protection
switch to have a chance to fix the problem before switching at a client layer.
When a new defect or more severe defect occurs (new Signal Failure), this event will
not be reported immediately to the protection switching mechanism if the
provisioned hold-off timer value is non-zero. Instead, the hold-off timer will be
started. When the timer expires, whether a defect still exists or not, the timer will be
checked. If one does exist, that defect will be reported to the protection switching
mechanism. The reported defect need not be the same one that started the timer.
Example
Console(config-erps-inst)#holdoff-timer 300
Console(config-erps-inst)#
mep-monitor This command specifies the CFM MEPs used to monitor the link on a ring node. Use
the no form to restore the default setting.
Syntax
mep-monitor {east | west} mep mpid
no mep-monitor {east | west}
east - Connects to next ring node to the east.
west - Connects to next ring node to the west.
mpid – Maintenance end point identifier. (Range: 1-8191)
Default Setting
None
Command Mode
ERPS Instance Configuration
Command Usage
◆ If this command is used to monitor the link status of an ERPS node with CFM
continuity check messages, then the MEG level set by the meg-level command
must match the authorized maintenance level of the CFM domain to which the
specified MEP belongs.
◆ To ensure complete monitoring of a ring node, use the mep-monitor
command to specify the CFM MEPs used to monitor both the east and west
ports of the ring node.