3com MSR 20-20 참조 매뉴얼

C

HAPTER

 32: PPP L

INK

 E

FFICIENCY

 M

ECHANISM

 C

ONFIGURATION

 C

OMMANDS

■

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.

ppp compression iphc rtp-connections, ppp compression iphc 
tcp-connections.

# 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 number

Interface view

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

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.

# 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