When acknowledgment is not received, the trigger message is re-transmitted using the retransmission parameters configured on the interface.
Note
RSVP refresh messages never require acknowledgment, even when reliable messaging is enabled.To enable RSVP reliable messaging on an interface, complete the following steps.
device# configure
device(config)# router mpls
device(config-router-mpls)# mpls-interface ethernet 0/13
device(config-router-mpls-eth-0/13)# rsvp
device(config-router-mpls-eth-0/13-rsvp)# reliable-messaging
The following example shows the enabling of RSVP reliable messaging on an ethernet interface 0/13.
device# configure device(config)# router mpls device(config-router-mpls)# mpls-interface ethernet 0/13 device(config-router-mpls-eth-0/13)# rsvp device(config-router-mpls-eth-0/13-rsvp)# reliable-messaging
The previous commands enable RSVP reliable messaging on interface 0/13 with all parameters set to their defaults (or to settings previously configured on this interface, if any).