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528 CHAPTER 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
ppp compression 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