User manual

7 LAPB and X.25 configuration
Nortel Secure Router 8000 Series
Configuration -WAN Access
7-50 Nortel Networks Inc. Issue 5.3 (
30 March 2009)
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7.8.5 Example for transmitting IP datagrams through X.25 PVC
Networking requirements
Without adding static routes, PC A and PC B can exchange routing information between
Ethernet A and Ethernet B through the RIP routing protocol.
Figure 7-14 X.25 PVC bearing IP datagram
ethernet2/0/0
202.38.165.1/24
RouterA
Router B
PVC 3
Ethernet A
serial1/0/0
192.149.13.1/24
PC A PC B
serial1/0/0
192.149.13.2/24
ethernet2/0/0
196.25.231.1/24
Ethernet B
PVC 4
x.25
windowsize:5 5
packetsize:512 512
Configuration roadmap
The configuration roadmap is as follows:
1. Configure the link protocol to X.25.
2. Configure X121 addresses.
3. Configure PVC routes.
Data preparation
To complete the configuration, you need the following data:
z
In Figure 7-14, the PVC section allowed by the packet network is [1, 8]. The PVC
numbers assigned to Router A and Router B are 3 and 4 respectively.
z
The IP network addresses of Ethernets A and B are 202.38.165.0/24 and 196.25.231.0/24
respectively.
z
The X.121 addresses assigned to the interfaces on Router A and Router B are 21 and 22
respectively.
Configuration procedure
Step 1 Configure Router A.
<RouterA> system-view
[RouterA] interface ethernet 2/0/0
[RouterA-Ethernet2/0/0] ip address 202.38.165.1 255.255.255.0
[RouterA-Ethernet2/0/0] quit
[RouterA] interface serial 1/0/0
[RouterA-Ethernet2/0/0] interface serial 1/0/0
[RouterA-Serial1/0/0] ip address 192.149.13.1 255.255.255.0