In revertive-mode, once the condition causing a Signal failure has cleared, traffic is blocked on the RPL and restored to the working transport entity. In non-revertive-mode, traffic is allowed to use the RPL if it has not failed, even after the device is no longer in Protection state. The link where the failure had occurred continues to remain blocked and the RPL remains unblocked.
After the Ethernet Ring enters a protected state, if you do not want the topology to return to the original state you can use the non-revertive-mode command to keep it in the new state. Enter this command on the RPL owner only, and then enter the enable command.
The following example configures non-revertive mode and enables the configuration.
device# configure terminal device(config)# erp 100 device(config-erp-100)# non-revertive-mode
Use the no non-revertive-mode command to remove the non-revertive mode setting.