Configuring IP Multicast Routing

Configuring RTP Header Compression

Enabling RTP Header Compression on a Serial Interface

To enable RTP header compression for serial encapsulation HDLC or PPP, use the following command in interface configuration mode:

Command

Purpose

 

 

Router(config-if)#ip rtp header-compression

Enables RTP header compression.

[passive]

 

 

 

If you include the passive keyword, the software compresses outgoing RTP packets only if incoming RTP packets on the same interface are compressed. If you use the command without the passive keyword, the software compresses all RTP traffic.

See the “RTP Header Compression Examples” section later in this chapter for an example of how to enable RTP header compression on a serial interface.

Enabling RTP Header Compression with Frame Relay Encapsulation

To enable RTP header compression with Frame Relay encapsulation, use the following commands in interface configuration mode as needed:

Command

Purpose

 

 

Router(config-if)# frame-relay ip rtp

Enables RTP header compression on the physical interface, and

header-compression [passive]

all the interface maps inherit it. Subsequently, all maps will

 

perform RTP/IP header compression.

 

 

Router(config-if)# frame-relay map ip ip-address

Enables RTP header compression only on the particular map

dlci [broadcast] rtp header-compression [active

specified.

passive] [connections number]

 

 

 

Router(config-if)# frame-relay map ip ip-address

Enables both RTP and TCP header compression on this link.

dlci [broadcast] compress [active passive]

 

[connections number]

 

 

 

See the “RTP Header Compression Examples” section later in this chapter for an example of how to enable RTP header compression with Frame Relay encapsulation.

To disable RTP and TCP header compression with Frame Relay encapsulation, use the following command in interface configuration mode:

Command

Purpose

 

 

Router(config-if)# frame-relay map ip ip-address

Disables both RTP and TCP header compression on this link.

dlci [broadcast] nocompress

 

 

 

Changing the Number of Header Compression Connections

For Frame Relay encapsulation, the software does not specify a maximum number of RTP header compression connections. You can configure from 3 to 256 RTP header compression connections on an interface.

Cisco IOS IP Configuration Guide

IPC-432

Page 478
Image 478
Cisco Systems 78-11741-02 manual Enabling RTP Header Compression on a Serial Interface, IPC-432