CLI Reference Guide-R04

Chapter 21 | ERPS Commands
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guard-timer This command sets the guard timer to prevent ring nodes from receiving outdated
R-APS messages. Use the no form to restore the default setting.
Syntax
guard-timer milliseconds
no guard-timer
milliseconds - The guard timer is used to prevent ring nodes from receiving
outdated R-APS messages. During the duration of the guard timer, all
received R-APS messages are ignored by the ring protection control
process, giving time for old messages still circulating on the ring to expire.
(Range: 10-2000 milliseconds, in steps of 10 milliseconds)
Default Setting
500 milliseconds
Command Mode
ERPS Instance Configuration
Command Usage
The guard timer duration should be greater than the maximum expected
forwarding delay for an R-APS message to pass around the ring. A side-effect of the
guard timer is that during its duration, a node will be unaware of new or existing
ring requests transmitted from other nodes.
Example
Console(config-erps-inst)#guard-timer 300
Console(config-erps-inst)#
holdoff-timer This command sets the timer to filter out intermittent link faults. Use the no form to
restore the default setting.
Syntax
holdoff-timer milliseconds
no holdoff-timer
milliseconds - The hold-off timer is used to filter out intermittent link faults.
Faults will only be reported to the ring protection mechanism if this timer
expires. (Range: 0-10000 milliseconds, in steps of 100 milliseconds)
Default Setting
0 milliseconds
Command Mode
ERPS Instance Configuration