The Wait To Block (WTB) timer ensures that clearing of a single Forced Switch (FS) command does not trigger the reblocking of the RPL when multiple FS situations co-exist in an Ethernet Ring. When recovering from a Manual Switch (MS) or FS command, the delay timer must be long enough to receive any latent remote FS or MS.
While it is running, the WTB running signal is continuously generated. The WTB timer is 5000 ms (5 seconds) longer than the guard timer. You can configure this timer in 100-ms increments from 5100 to 7000 ms (7 seconds); the default value is 5500 ms.
The WTB timer can be stopped by means of the clear erp wtb-time command.
The following example configures a WTB time of 5100 ms.
device# configure terminal device(config)# erp 1 device(config-erp-1)# wtb-time 5100
Use the no wrb-time command to clear the configuration in ERP configuration mode, restoring it to the default value.
Use the global clear erp wtb-time command to clear the WTB timer for a specific ERP instance, as in the following example for instance 1.
device# clear erp wtb-time 1