3Com 3031 Command Reference Manual page 240

240 C 4: L L P
HAPTER INK AYER ROTOCOL
Display PPP configuration and operating state of the interface.
The part in boldface is the relative information of PPP, including the current status
of LCP and IPCP. Users can diagnose some faults according to the information.
ip tcp vjcompress
Syntax
ip tcp vjcompress
undo ip tcp vjcompress
View
Interface view
Parameter
None
Description
Using the ip tcp vjcompress command, you can enable a PPP interface to compress
the VJ TCP header. Using the undo ip tcp vjcompress command, you can 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
The VJ TCP header is permitted to compress at the PPP interface
[3Com-dialer0] ip tcp vjcompress
link-protocol ppp
Syntax
link-protocol ppp
View
VT view or Dialer view
Parameter
None
Description
Using the link-protocol ppp command, you can configure the link-layer protocol
encapsulated on the interface as PPP.
By default, the link-layer protocol for interface encapsulation is PPP.