Filter
Top Products
AI2524 Router Card User’s Manual
Page 12-2 August 1997
2524UM
Note: If you connect a router to an X.25 network, use the
parameters set by your network administrator for th
connection; these parameters will typically be thos
described in the Configure Interface and Modify LAPB
Protocol Parameters sections. Also, note that the X.25
Level 2 parameters described in the Modify LAPB
Protocol Parameters section affect X.25 Level 3
operations.
Configure
Interface
To configure an X.25 interface, perform these tasks:
z
Set the X.25 Mode
z
Set the Virtual Circuit Ranges
z
Set the Packet Numbering Modulo
z
Set the X.121 Address
z
Set the Default Flow Control Values
These tasks describe the parameters that are essential for correct X.25
behavior. The first task is required. The others might be required or op-
tional, depending on what the router is expected to do and on the X.25
network.
Set the X.25 Mode
A router using X.25 Level 3 encapsulation can:
z
Act as a DTE or DCE protocol device (according to the needs of
your X.25 service supplier)
z
Use the Internet Engineering Task Force (IETF) standard encap-
sulation, as specified by RFC 1356.
Because the default serial encapsulation is High-level Data Link Con-
trol (HDLC), you must explicitly configure an X.25 encapsulation
method.
In interface configuration mode, configure the mode of operation and
one of these encapsulation types for a specified interface:
encapsulation x25 [dte | dce] [ietf]]
Typically, a Public Data Network (PDN) will require attachment as
DTE. This requirement is distinct from the hardware interface DTE or
DCE identity.
The default mode of operation is DTE, and the default encapsulation
method is Cisco's pre-IETF method.