528CHAPTER 32: PPP LINK EFFICIENCY MECHANISM CONFIGURATION COMMANDS

If the configuration is applied on a MP bundle, you need to shut down and then bring up all the member interfaces of the MP bundle for the configuration to take effect.

Related command: ppp compression iphc rtp-connections,ppp compression iphc tcp-connections.

Example # Enable IP header compression on interface Serial 1/0.

<Sysname> system-view

[Sysname] interface serial 1/0

[Sysname-Serial1/0] ppp compression iphc

ppp compression iphc rtp-connections

Syntax ppp compression iphc rtp-connections number

undo ppp compression iphc rtp-connections

View Interface view

Parameter number: The maximum connection number of RTP header compression. The value ranges from 3 to 1000.

Description Use the ppp compression iphc rtp-connections command to specify the maximum number of RTP header compression connections allowed on an interface.

Use the undo ppp compression iphc rtp-connections command to restore the default value, which is 16.

RTP is connection oriented; the number of RTP connections that a link can accommodate is relatively large. The compression algorithm, however, requires the device to maintain some information for each connection when compressing headers. To restrict the memory load generated by compression, you can use the

pppcompression iphc rtp-connections command to limit the number of compression. For example, if you limit RTP connections to three, the packets on the fourth RTP connection will not be compressed.

The configuration takes effect after you execute the command shutdown and then undo shutdown on the interface. If you are configuring MP, you must execute the commands shutdown and undo shutdown on all MP member interfaces.

Example # Set the number of compression-enabled RTP header connections to 10 on interface Serial 1/0.

<Sysname> system-view

[Sysname] interface serial 1/0

[Sysname-Serial1/0] ppp compression iphc rtp-connections 10

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3Com MSR 30, MSR 50 manual Ppp compression iphc rtp-connections