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226 CHAPTER 16: CONFIGURING LAPB AND X.25
II. Networking Diagram
Figure 69 Connect the router to X.25 public packet network
III. Configuration Procedure
1 Configure Router A:
a Configure interface IP address
[Router]interface Serial 0
[Router-Serial0]ip address 168.173.24.1 255.255.255.0
b Connect to public packet network, make the router as DTE side
[Router-Serial0]link-protocol x25 dte
[Router-Serial0]x25 x121-address 30561001
[Router-Serial0]x25 window-size 5 5
[Router-Serial0]x25 packet-size 512 512
[Router-Serial0]x25 map ip 168.173.24.2 x121-address 30561002
[Router-Serial0]x25 map ip 168.173.24.3 x121-address 30561003
2 Configure Router B:
a Configure interface IP address
[Router]configure
[Router]interface Serial 0
[Router-Serial0]ip address 168.173.24.2 255.255.255.0
b Connect to public packet network, make the router as DTE side
[Router-Serial0]link-protocol x25 dte
[Router-Serial0]x25 x121-address 30561002
[Router-Serial0]x25 window-size 5 5
[Router-Serial0]x25 packet-size 512 512
[Router-Serial0]x25 map ip 168.173.24.1 x121-address 30561001
[Router-Serial0]x25 map ip 168.173.24.3 x121-address 30561003
3 Configure Router C:
a Configure interface IP address
[Router]interface Serial 0
[Router-Serial0]ip address 168.173.24.3 255.255.255.0
b Connect to public packet network, make the router as DTE side
[Router-Serial0]link-protocol x25 dte
[Router-Serial0]x25 x121-address 30561003
[Router-Serial0]x25 window-size 5 5
[Router-Serial0]x25 packet-size 512 512
RouterA
RouterB
RouterC
Serial0
Serial0
Serial0
IP: 168.173.24.1
X.121: 30561001
IP: 168.173.24.2
X.121: 30561002
X.25
windowsize: 5 5
packetsize: 512 512