Does RSVP reservation protocol allow retaining the reserved path by the host for later use? For example, a host A reserves a path for communicating with host B. After communication is complete, can the path be retained for some duration to avoid signaling (related to reservation) if the same host A needs to communicate with host B or any other host in the same network as host B?
RSVP reserves resources along a certain path in the network, but the destination could only be specified by a single address (unicast or multicast) so as far as I know you can neither reserve resources towards a CIDR block, nor send traffic to a different host in the same subnet as the one you initially reserved resources for and assume that the reservation will apply.
The path can be reused so long as you keep refreshing it periodically, and so long as the network doesn't send back an error when you attempt to refresh.