AIS AI2524 Manuel D’Utilisation
AI2524 Router Card User’s Manual
Page 12-22
August 1997
2524UM
Set X.25 TCP/IP Header Compression
The AI2524 supports RFC 1144 TCP/IP header compression (THC)
on serial lines using HDLC and X.25 encapsulation. THC encapsula-
tion is different from other encapsulation traffic. The implementation
of compressed TCP over X.25 uses one virtual circuit to pass the com-
pressed packets. Any IP traffic (including standard TCP) is separate
from TCH traffic; it is carried over separate IP encapsulation virtual
circuits or identified separately in a multiprotocol virtual circuit.
on serial lines using HDLC and X.25 encapsulation. THC encapsula-
tion is different from other encapsulation traffic. The implementation
of compressed TCP over X.25 uses one virtual circuit to pass the com-
pressed packets. Any IP traffic (including standard TCP) is separate
from TCH traffic; it is carried over separate IP encapsulation virtual
circuits or identified separately in a multiprotocol virtual circuit.
Note:
If you specify both
ip
and
compressedtcp
in the same
x25 map compressedtcp
command, they must both
specify the same IP address.
In interface configuration mode, set up a separate virtual circuit for
X.25 TCP/IP header compression:
X.25 TCP/IP header compression:
x25 map compressedtcp
ip-address [protocol2
address2 [...[protocol9 address9 ]]] x121-
address [option]
address [option]
Configure X.25 Bridging
The AI2524 transparent bridging software supports bridging ove
X.25 virtual circuits. Bridging is not supported for RFC 1356 opera-
tion. Bridge maps must include the broadcast option for correct oper-
ation.
X.25 virtual circuits. Bridging is not supported for RFC 1356 opera-
tion. Bridge maps must include the broadcast option for correct oper-
ation.
In interface configuration mode, enable the X.25 bridging capability:
x25 map bridge
x121-address broadcast
[
option]