3com 3031 Instruccion De Instalación

C

HAPTER

 26: X.25 

AND

 LAPB C

ONFIGURATIONS

 IP networks in different regions are connected via X.25 packet switching network 
to carry data over X.25 network. Meanwhile, the network providers provide X.25 
network load sharing function, and a user can perform the relative settings in 
conjunction with it on local terminal to implement the line load sharing when 
different clients access the server.

Figure 80   Transmiting IP data over X.25 hunt group

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 RouterC , so 
you must configure a virtual IP address and two static routes on the interface Serial 
1/0/0 to “cheat” the router. In this way, RouterC will deem that there are two 
routes towards the network segment 10.1.1.0, so as to implement the load 
sharing.

1 Configure RouterA

a Configure the interface Ethernet 0/0/0

[3Com]interface ethernet 0/0/0

[3Com-Ethernet0/0/0]ip address 10.1.1.1 255.255.255.0

b Configure the interface Serial 0/0/0

[3Com]interface serial 0/0/0

[3Com-Serial0/0/0]link-protocol x25 dte

[3Com-Serial0/0/0]x25 x121-address 1111

[3Com-Serial0/0/0]ip address 1.1.1.1 255.255.255.0

[3Com-Serial0/0/0]x25 map ip 1.1.1.3 x121-address 3333

[3Com-Serial0/0/0]x25 vc-per-map 2

c Configure a static route to RouterC

[3Com]ip route-static 10.3.1.0 24 1.1.1.3

2 Configure RouterB

a Configure the interface Ethernet 0/0/0

[3Com]interface ethernet 0/0/0

[3Com-Ethernet0/0/0]ip address 10.2.1.1 255.255.255.0

b Configure the interface Serial 0/0/0

PC B

10.2.1.2

QuidwayA

S0/0/0

1.1.1.3

S0/0/0

1.1.1.1

2.1.1.3

S1/0/0

S0/0/0

1.1.1.2

QuidwayC

Server A
10.3.1.2

Server B
10.3.1.3

PC A

10.1.1.2

X.25

packet

switching

network

E0/0/0

10.1.1.1

E0/0/0

10.2.1.1

E0/0/0

10.3.1.1

3333

1111

2222

QuidwayB