Subinterface Configuration Example - 3Com MSR 50 Series Configuration Manual

X.25 Subinterface
Configuration Example
Network requirements
In the following figure, Router A is configured with two subinterfaces, which are
connected with Router B and Router C. Router D operates as an X.25 switch. It is
desired that Router A can communicate with Router B and Router C respectively.
Network diagram
Figure 76 X.25 subinterface configuration
Router A
S 2/0.1
10 .1.1.2/16
S 2/0.2
20 .1.1.2/16
X 121 address:100
Configuration procedure
1 Configure Router A
<RouterA> system-view
[RouterA] interface serial 2/0
[RouterA-Serial2/0] link-protocol x25 dte
[RouterA-Serial2/0] x25 x121-address 100
# Configure subinterface Serial 2/0.1, and X.25 mapping to Router B.
[RouterA-Serial2/0] interface serial 2/0.1
[RouterA-Serial2/0.1] ip address 10.1.1.2 255.255.0.0
[RouterA-Serial2/0.1] x25 map ip 10.1.1.1 x121-address 200
# Configure subinterface serial 2/0.2, and X.25 mapping to Router C.
[RouterA-Serial2/0.1] interface serial 2/0.2
[RouterA-Serial2/0.2] ip address 20.1.1.2 255.255.0.0
[RouterA-Serial2/0.2] x25 map ip 20.1.1.1 x121-address 300
2 Configure Router B
<RouterB> system-view
[RouterB] interface serial 2/0
[RouterB-Serial2/0] link-protocol x25 dte
[RouterB-Serial2/0] x25 x121-address 200
[RouterB-Serial2/0] x25 map ip 10.1.1.2 x121-address 100
[RouterB-Serial2/0] ip address 10.1.1.1 255.255.0.0
3 Configure Router C
<RouterC> system-view
[RouterC] interface serial 2/0
[RouterC-Serial2/0] link-protocol x25 dte
[RouterC-Serial2/0] x25 x121-address 300
[RouterC-Serial2/0] x25 map ip 20.1.1.2 x121-address 100
[RouterC-Serial2/0] ip address 20.1.1.1 255.255.0.0
Router D
20.1.1.1/16
X 121 address:300
S 2/0
S2/2
S 2/1
S 2/0
10 .1 .1.1/16
X 121 address:200
Router B
X.25 Configuration Examples
S2/0
Router C
323