Cisco 3825 - Manual (Page 175)

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Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03
Appendix A Cisco 3825 Mobile Wireless Edge Router RAN-O Command Reference
ip rtp header-compression
Unicast or Multicast RTP Packets
This command can compress unicast or multicast RTP packets, and, hence, multicast backbone
(MBONE) traffic can also be compressed over slow links. The compression scheme is beneficial only
when you have small payload sizes, as in audio traffic.
Examples The following example enables RTP header compression on the Serial1/0/0 interface and limits the
number of RTP header compression connections to 10. In this example, the optional iphc-format
keyword of the ip rtp header-compression command is specified.
Router> enable
Router# configure terminal
Router(config)# interface Serial1/0/0
Router(config-if)# encapsulation ppp
Router(config-if)# ip rtp header-compression iphc-format
Router(config-if)# ip rtp compression-connections 10
Router(config-if)# exit
The following example enables RTP header compression on the Serial1/0/0 interface and limits the
number of RTP header compression connections to 20. In this example, the optional iphc-format
keyword of the ip rtp header-compression command is specified.
Router> enable
Router# configure terminal
Router(config)# interface Serial1/0/0
Router(config-if)# encapsulation ppp
Router(config-if)# ip rtp header-compression iphc-format
Router(config-if)# ip rtp compression-connections 20
Router(config-if)# exit
In the following example, RTP header compression is enabled on the Serial1/0/0 interface and the
optional periodic-refresh keyword of the ip rtp header-compression command is specified:
Router> enable
Router# configure terminal
Router(config)# interface Serial1/0/0
Router(config-if)# encapsulation ppp
Router(config-if)# ip rtp header-compression iphc-format periodic-refresh
Router(config-if)# ip rtp compression-connections 10
Router(config-if)# exit
Related Commands Command Description
clear ip rtp header-compression Clears RTP header compression structures and statistics.
iprtp compression-connections Specifies the total number of RTP header compression
connections that can exist on an interface.
show ip rtp header-compression Displays RTP header compression statistics.
show running-config Displays the contents of the currently running
configuration file or the configuration for a specific
interface, or map class information.