Nortel Networks 8000 - Manual (Page 256)

Nortel Secure Router 8000 Series
Configuration -WAN Access 7 LAPB and X.25 configuration
Networking requirements
You configure multiple sub-interfaces on a physical interface to connect multiple peers of
different network sections. In Figure 7-16, you configure Router A with two sub-interfaces
that interconnect to Router B and Router C respectively.
Figure 7-16 Diagram of X.25 sub-interface configuration
Router D
Serial1/0/^^^M ;erial1/0/2
Serial1/0/0.1
10.1.1.2/16, ^
Serial1/0/0.2
Router A
Serial1/0/0
20.1.1.1/16
Serial1/0/0 Router C
10.1.1.1/16
Router B
Configuration roadmap
The configuration roadmap is as follows:
1. Configure interfaces protocols on each router.
2. Configure X121 and IP addresses on each interface.
3. Configure the address mapping.
4. Configure the X25 switching.
Data preparation
To complete the configuration, you need the following data:
• The X121 addresses of the interfaces on Router A, Router B and Router C are 100, 200
and 300 respectively.
• The IP address of two sub-interfaces on Router A and that of Router B and Router C are
10.1.1.1/16, 20.1.1.1/16, 10.1.1.2/16, and 20.1.1.2/16 respectively.
Configuration procedure
Step 1 Configure Router A.
<RouterA> system-view
[RouterA] interface serial 1/0/0
[RouterA-Serial1/0/0] link-protocol x25 dte
[RouterA-Serial1/0/0] x25 x121-address 100
[RouterA-Serial1/0/0] quit
# Create the sub-interface Serial 1/0/0.1.
[RouterA-Serial1/0/0] interface serial 1/0/0.1
[RouterA-Serial1/0/0.1] ip address 10.1.1.2 255.255.0.0
[RouterA-Serial1/0/0.1] x25 map ip 10.1.1.1 x121-address 200
Issue 5.3 (30 March 2009) Nortel Networks Inc. 7-53