Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 1 PPP and MP Configuration Commands
3Com Corporation
1-25
View
Interface view
Parameter
None
Description
Use the ip tcp vjcompress command to enable a PPP interface to compress the VJ
TCP header.
Use the undo ip tcp vjcompress command to disable the PPP interface to compress
the VJ TCP header.
If the VJ TCP header is permitted to compress at the PPP interface, the interface at the
opposite end shall also permit to compress the VJ TCP header. This command is only
used in the centralized environment.
By default, the VJ TCP header is disabled to compress at the PPP interface.
Example
# Permit VJ TCP header compression on the PPP interface.
[3Com-dialer0] ip tcp vjcompress
1.2.7 ppp compression iphc
Syntax
ppp compression iphc [ nonstandard ]
undo ppp compression iphc
View
Interface view
Parameter
nonstandard: Nonstandard encapsulation mode.
Description
Use the ppp compression iphc command to enable IP header compression on the
interface.
Use the undo ppp compression iphc command to disable IP header compression.
IP header compression discussed here refers to compression of TCP and RTP
headers.
By default, TCP header compression and RTP header compression are disabled on the
interface.