Cisco Cisco IOS Software Release 12.2(33)SRE

When you configure an interface-based receiver proxy to reply, RSVP performs Call Admission Control 
(CAC) on the outbound (or egress) interface for the flow. If CAC fails, the reservation is not generated. 
This is the same behavior as for the global RSVP receiver proxy command.

The outbound interface that a flow uses is determined when the flow is set up, and the interface-based 
receiver proxy is consulted at that time. The interface-based receiver proxy is not consulted if there is a 
change in routing for an existing flow.

If the interface-based receiver proxy receives a RESVERR message with an admission control failure 
error or a policy reject error, the interface-based receiver proxy generates a PATHERR message with the 
same error to provide explicit notification to the sender of the reservation failure.

In the following example, PATH messages sent through Ethernet interface 3/0 are rejected and 
PATHERROR messages are generated: 

Router# configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)# interface Ethernet3/0

Router(config-if)# ip rsvp listener outbound reject

Configures an RSVP router to listen for PATH messages.

Enables a router to simulate receiving and forwarding RSVP RESV 
messages.

Enables a router to simulate a host generating RSVP RESV messages.

Displays configured RSVP listeners.