X2T Pvc Configuration Example; Troubleshooting Lapb Configuration; Lapb (Or X.25) Of Two Sides Always Being Down - 3Com MSR 50 Series Configuration Manual

340 C 14: X.25
HAPTER
X2T PVC Configuration
Example
Troubleshooting LAPB
Configuration
LAPB (or X.25) of Two
Sides Always Being
Down
LAPB C
AND ONFIGURATION
# Configure an X2T route.
[Router] translate ip 10.1.1.1 port 102 x25 2222
[Router] translate x25 1111 ip 10.1.1.2 port 102
Network requirements
The router connects X.25 and IP networks together. In this connection, the X.25
terminal communicates with the router through PVC and the X2T technology
applied on the router enables the communication between IP host and X.25
terminal.
Network diagram
Figure 86 Network diagram for X2T PVC
X.25 network
X.25 terminal
Configuration procedure
# Enable X.25 switching.
<Router> system-view
[Router] x25 switching
# Configure interface Serial 2/0.
[Router] interface serial 2/0
[Router-Serial2/0] link-protocol x25 dce
[Router-Serial2/0] x25 vc-range in-channel 10 20 bi-channel 30 1024
[Router-Serial2/0] quit
# Configure interface Ethernet 1/0.
[Router] interface ethernet 1/0
[Router-Ethernet1/0] ip address 10.1.1.1 255.255.255.0
[Router-Ethernet1/0] quit
# Configure an X2T route.
[Router] translate ip 10.1.1.1 port 102 pvc serial2/0 1
Symptom
Link layer protocol LAPB (or X.25) of two sides is always down.
Analysis
A possible reason is that the two sides are working in the same mode (DTE or
DCE).
Eth1/0
S 2/0
10.1.1.1/24
PVC 1
Router
10 .1 .1.2/24
IP network
Host