Cisco MWR 1941-DC - 1941 Mobile Wireless Router Software Configuration Manual page 88

ip rtp header-compression
ip rtp header-compression
To enable Real-Time Transport Protocol (RTP) header compression, use the ip rtp header-compression
interface configuration command. To disable RTP header compression, use the no form of this command.
Syntax Description passive
ignore-id
Defaults
Disabled
Command Modes Interface configuration
Command History Release
11.3
12.2(15)MC1
12.3(11)T
Usage Guidelines If you use this command without the passive keyword, the software compresses all RTP traffic.
You can compress IP/UDP/RTP headers and IP/UDP headers to reduce the size of your packets.
Compressing headers is especially useful for RTP, because RTP payload size can be as small as 20 bytes,
and the decompressed header is 40 bytes.
RTP header compression is supported on serial lines using PPP encapsulation. You must enable
compression on both ends of a serial connection.
Examples
The following example enables RTP header compression on fast ethernet interface 1 and limits the
number of RTP header compression connections to 10:
interface serial 0
encapsulation ppp
ip rtp header-compression
ip rtp compression-connections 10
Related Commands
Cisco MWR 1941-DC Mobile Wireless Edge Router Software Configuration Guide
5-8
ip rtp header-compression [passive] [ignore-id]
no ip rtp header-compression
(Optional) Compresses outgoing RTP packets only if incoming RTP packets
on the same interface are compressed. This option is not applicable on PPP
links.
(Optional) Suppresses the IP ID checking in RTP/UDP header compression.
Modification
This command was introduced.
This command was incorporated in Cisco IOS Release 12(15)MC1 and the
ignore-id keyword option was added.
This command was incorporated in Cisco IOS Release 12.3(11)T.
Chapter 5 Cisco MWR 1941-DC Router IP-RAN Command Reference
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