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Chapter 12: AI2524 X.25 Configuration Steps
August 1997 Page 12-5
2524UM
x25 lic 5
x25 hic 20
x25 ltc 25
Set the Packet Numbering Modulo
The AI2524 implementation of X.25 supports both modulo 8 and mod-
ulo 128 packet sequence numbering; module 8 is the default.
In interface configuration mode, set the packet numbering modulo:
x25 modulo {8 | 128}
Note: Because the X.25 protocol requires the DTE and DCE to
have identical modulos, changes you make to the modulo
when the interface is up are held until the X.25 protocol
restarts the packet service.
The X.25 modulo and the LAPB modulo are distinct and serve differ-
ent purposes. LAPB modulo 128 (or extended mode) can be used to
achieve higher throughput across the DTE or DCE interface; it affects
only the local point of attachment. X.25 Packet-Level Protocol (PLP)
modulo 128 can be used to achieve higher end-to-end throughput for
virtual circuits by allowing more data packets to be in transit through
the X.25 network.
Set the X.121 Address
If your router does not originate or terminate calls but only participates
in X.25 switching, this task is optional. However, if the router is at
tached to a PDN, you must set the interface X.121 address assigned by
the X.25 network service provider.
In interface configuration mode, set the X.121 address:
x25
address x121-address