- RSVP is a strict reservation of bandwidth made.
- Not used as often as of overhead
- RSVP still is in use for MPLS traffic engineering
- to make the reservation it first from source sends a path message to the destination this sort of message aking all routers in the transit path do they have the allocated bandwidth requested to reserve do they support rsvp. It is more of can we do this sort of meesage
- The destination will then respond with teh RESV message which is the actually reservation of the bandwidth after it has recieved the path message confirming that it is possible
- The resv contains
-TSPEC (traffic spec,token bucket and parameters)
-RSPEC (Reservation spec,type of service)
Filter Spec: Flows services to reserve resources for.
- RSVP performs admission control which based on interface bandwidth and is configurable with
- Every installed flow has a policer associated with the flow +wfq queue/weight dedicated to flow
- RSVP requires CBWFQ or wfq
- RSVP does not work with HQF should be configured in Class default of class based weight fair quesing
Commands
sender
ip rsvp sender-host
reciever
ip rsvp reserveration-host
transit node
ip rsvp bandwidth
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