Configuration Examples; Direct Connection Of Two Routers Via Serial Interfaces (One Mapping) - 3Com MSR 50 Series Configuration Manual

316 C 14: X.25
HAPTER
X.25 Configuration
Examples
Direct Connection of
Two Routers via Serial
Interfaces (One
Mapping)
LAPB C
AND ONFIGURATION
Network requirements
As shown in the following figure, two routers are directly connected; IP packets
can be transmitted between serial interfaces over X.25 link layer protocol. Only
one IP to X.121 mapping is available on Router A.
Network diagram
Figure 71 Direct connection of two routers through serial interfaces (X.25)
S 2/0
202 .38.60 .1 /24
X 121 address: 20112451
Router A
Configuration procedure
1 Configure RouterA:
# Enter interface view
<RouterA> system-view
[RouterA] interface serial 2/0
# Assign an IP address for the interface.
[RouterA-Serial2/0] ip address 202.38.60.1 255.255.255.0
# Configure the link layer protocol of the interface as X.25, and configure the
interface to operate in DTE mode.
[RouterA-Serial2/0] link-protocol x25 dte
# Assign an X.121 address to the interface.
[RouterA-Serial2/0] x25 x121-address 20112451
# Configure address mapping to the peer.
[RouterA-Serial2/0] x25 map ip 202.38.60.2 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
S 2/0
202 .38 .60 .2 /24
X121 address: 20112452
Router B