Cisco Systems 78-13983-04 manual Configuring PPP Multiplexing, Configuring RTP/UDP Compression

Chapter 4 Configuring with the Command-Line Interface

Configuring Multilink Interfaces

To configure IP address assignment, do the following do the following while still in multilink interface configuration mode:

Step 1 Specify an IP address, an address from a specific IP address pool, or an address from the Dynamic Host Configuration Protocol (DHCP) mechanism to be returned to a remote peer connecting to this interface:

RPM-3(config-if)#peer default ip address {ip-addressdhcp pool [pool-name]}

Configuring PPP Multiplexing

To enable and control the multiplexing of PPP frames, do the following while still in multilink interface configuration mode:

Step 1 Enable PPP multiplexing:

RPM-3(config-if)# ppp mux

Step 2 Specify the parameters of multiplexing.

To set the maximum time delay, enter:

RPM-3(config-if)# ppp mux delay integer

To set the maximum length of the subframe, enter:

RPM-3(config-if)#ppp mux subframe length integer

To set maximum length of the superframe, enter:

RPM-3(config-if)# ppp mux frame integer

To set the maximum number of subframes in a superframe, enter:

RPM-3(config-if)#ppp mux subframe count integer

To set the default PPP protocol ID, enter:

RPM-3(config-if)# ppp mux pid integer

Configuring RTP/UDP Compression

Enabling compression on both ends of a low-bandwidth serial link can greatly reduce the network overhead if there is a lot of RTP traffic on that slow link. This compression is beneficial especially when the RTP payload size is small (for example, compressed audio payloads of 20-50 bytes).

Before you can enable RTP header compression, you must configure a serial line that uses PPP encapsulation.

Cisco MWR 1900 Mobile Wireless Edge Router Software Configuration Guide

78-13983-04 4-9