Cisco Cisco IOS Software Release 12.0(22)S

To set up message pacing (that is, to control the transmission rate for Resource Reservation Protocol 
(RSVP) messages), use the ip rsvp msg-pacing command in global configuration mode. To disable this 
feature, use the no form of this command. 

ip rsvp msg-pacing [period ms [burst msgs [maxsize qsize]]] 

RSVP messages are not paced.
If you enter the command without the optional arguments, the transmission rate for RSVP messages is 
limited to 200 messages per second per outgoing interface.
The default output queue size, specified in the maxsize keyword, is 500.

Global configuration

You can use this command to prevent a burst of RSVP traffic engineering signaling messages from 
overflowing the input queue of a receiving router, which would cause the router to drop some messages. 
Dropped messages substantially delay the completion of signaling for LSPs for which messages have 
been dropped.

In the following example, a router can send a maximum of 150 RSVP traffic engineering signaling 
messages in 1 second to a neighbor, and the size of the output queue is 750: 

Router(config)# ip rsvp msg-pacing period 1 burst 150 maxsize 750

period ms

(Optional) Length of the interval, in milliseconds, during which a router can 
send the number of RSVP messages specified in the burst keyword. The 
value can be from 1 to 1000 milliseconds.

burst msgs

(Optional) Maximum number of RSVP messages that a router can send to 
an output interface during each interval specified in the period keyword. 
The value can be from 1 to 2000.

maxsize qsize

(Optional) Size of per-interface output queues in the sending router. Valid 
values are from 1 to 2000.

12.0(14)ST

This command was introduced.

12.2(11)S

This command was integrated into Cisco IOS Release 12.2(11)S. 

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S. 

12.2(28)SB

This command was integrated into Cisco IOS Release 12.2(28)SB.