Manual

Nortel Secure Router 8000 Series
Configuration -WAN Access
5 Logical interface configuration
Figure 5-1 Networking diagram of configuring the sub-interface
Configuration roadmap
The configuration roadmap is as follows:
1. Configure link protocol of the interface that accesses the FR network to FR.
2. Configure sub-interfaces and allocate IP addresses and VC.
3. Configure the static route to the opposite LAN.
Data preparation
To configure the sub-interface, you need the following data:
• On Router A, the number of the interface that accesses the FR network is Serial 1/0/0:0.
• IP addresses of two sub-interfaces on Router A are 202.38.160.1 and 202.38.161.1
respectively.
• DLCIs that connect Router A to the FR network are 50 and 60 respectively.
• Network addresses of three LANs are shown in Figure 5-1.
• On Router B and Router C, the IP addresses of the interfaces that access the FR network
are 202.38.160.2 and 202.38.161.2 respectively.
Configuration procedure
Step 1 Configure Router A.
• Configure link layer protocol as FR on Serial 1/0/0:0 of Router A.
<RouterA> system-view
[RouterA] interface serial 1/0/0:0
[RouterA-Serial1/0/0:0] link-protocol fr
[RouterA-Serial1/0/0:0] quit
Issue 5.3 (30 March 2009) Nortel Networks Inc. 5-17