3Com MSR 50 Series Configuration Manual page 335

Network diagram
Figure 82 Transmit IP data over X.25 hunt group
Eth1 /0
10.1.1 .1/16
Host A
Router A
10.1.1.2 /16
Eth1 /0
10.2.1 .1/16
Router B
Host B
10.2.1.2 /16
Configuration procedure
In this example, since the network providers have configured load sharing on the
packet switch, you only need to configure X.25 switching.
Note that there have been two lines connected to the same peer on Router C, so
you must configure a virtual IP address and two static routes on the interface Serial
2/1 to "cheat" the router. In this way, Router C will deem that there are two
routes towards the network segment 10.1.1.0, to implement the load sharing.
1 Configure Router A
# Configure interface Ethernet 1/0.
<RouterA> system-view
[RouterA] interface ethernet 1/0
[RouterA-Ethernet1/0] ip address 10.1.1.1 255.255.255.0
[RouterA-Ethernet1/0] quit
# Configure interface Serial 2/0.
[RouterA] interface serial 2/0
[RouterA-Serial2/0] link-protocol x25 dte
[RouterA-Serial2/0] x25 x121-address 1111
[RouterA-Serial2/0] ip address 1.1.1.1 255.255.255.0
[RouterA-Serial2/0] x25 map ip 1.1.1.3 x121-address 3333
[RouterA-Serial2/0] x25 vc-per-map 2
# Configure a static route to Router C.
[RouterC] ip route-static 10.3.1.0 24 1.1.1.3
2 Configure Router B
# Configure interface Ethernet 1/0.
<RouterB> system-view
[RouterB] interface ethernet 1/0
[RouterB-Ethernet1/0] ip address 10.2.1.1 255.255.255.0
[RouterB-Ethernet1/0] quit
# Configure interface Serial 2/0.
S2/0
1.1.1.1 /24
X121 address :1111
X121 address:3333
X.25 packet
switching
network
S2/0
X121 address:3333
1.1.1.2 /24
X121 address :2222
X.25 Configuration Examples
S 2/0
1.1.1.3 /24
Eth1/0
10.3.1.1/24
S 2/1
Router C
2.1.1.3 /24
335
Server A
10.3.1 .2/24
Server B
10.3.1 .3/24