Chapter 20
| ERPS Commands
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ring-port command, the RPL owner specified with the rpl owner command,
and the control VLAN configured with the control-vlan command.
◆
Once enabled, the RPL owner node and non-owner node state machines will
start, and the ring will enter idle state if no signal failures are detected.
Example
Console(config-erps)#enable
Console(config-erps)#
Related Commands
erps (491)
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This command sets the guard timer to prevent ring nodes from receiving outdated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
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outdated R-APS messages.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 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)#guard-timer 300
Console(config-erps)#
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