cienaCesPbtTunnelReversionHoldTime

Object

scalar milliseconds Unsigned32

Protection of the transport mechanism in PBB-TE is achieved using redundant tunnels. A protected PBB-TE tunnel

is backed up by a standby PBB-TE tunnel serving the same destination. The former is marked as the primary

tunnel and the latter as the backup tunnel. Protection switching in PBB-TE requires both the ingress

and egress nodes to have matching configurations. Upon the failure of the primary tunnel, traffic is moved

over to the backup tunnel at the tunnel ingress. Tunnel reversion signifies the restoration of traffic

from this backup tunnel (now active) to the primary (now standby) after the primary tunnel is restored.

Two common methods are used - automatic and manual. In automatic reversion, the traffic is automatically

reverted back to the primary after it is restored. The manual method, on the other hand, requires the

operator to explicitly revert the traffic back to the primary. Manual reversion allows the network

operator to perform the task when the impact to the service is minimal and to schedule it. It also prevents

flip-flopping between the two tunnels if the primary is not entirely stable.

This object represents the hold time before data traffic on the backup tunnel automatically

reverts to the primary tunnel.