3Com MSR 50 Series Configuration Manual page 318

318 C 14: X.25 LAPB C
HAPTER AND ONFIGURATION
[RouterA-Serial2/0] link-protocol x25 dte
# Assign an X.121 address for the interface.
[RouterA-Serial2/0] x25 x121-address 20112451
# Configure address mappings to the peer.
[RouterA-Serial2/0] x25 map ip 202.38.161.2 x121-address 20112452
[RouterA-Serial2/0] x25 map ip 202.38.160.2 x121-address 20112452
# Configure the maximum packet size allowed and the window size.
[RouterA-Serial2/0] x25 packet-size 1024 1024
[RouterA-Serial2/0] x25 window-size 5 5
[RouterA-Serial2/0] shutdown
[RouterA-Serial2/0] undo shutdown
2 Configure Router B
# Enter interface view.
<RouterB> system-view
[RouterB] interface serial 2/0
# Assign an IP address for the interface.
[RouterB-Serial2/0] ip address 202.38.160.2 255.255.255.0
#Configure the link layer protocol of the interface as X.25 and specify the
interface to operate in DCE mode.
[RouterB-Serial2/0] link-protocol x25 dce
# Assign an X.121 address for the interface.
[RouterB-Serial2/0] x25 x121-address 20112452
# Configure address mapping to the peer.
[RouterB-Serial2/0] x25 map ip 202.38.160.1 x121-address 20112451
# Configure the maximum packet size allowed and the window size.
[RouterB-Serial2/0] x25 packet-size 1024 1024
[RouterB-Serial2/0] x25 window-size 5 5
[RouterB-Serial2/0] shutdown
[RouterB-Serial2/0] undo shutdown
# Since the peer (Router A) has two IP addresses corresponding to the X.121
address at the local end (Router B) and the local IP address is not in the first
mapping, two VCs will be created when connection being established, so you
need to specify the maximum number of VCs in the mapping as 2.
[RouterB-Serial2/0] x25 vc-per-map 2