3com 3031 Instruccion De Instalación
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C
HAPTER
26: X.25
AND
LAPB C
ONFIGURATIONS
Figure 75 One VC consisting of several logic-channels
Therefore, the PVC 3 and PVC 4 mentioned in the example actually refer to the
numbers of the logic-channels between the routers and the PBXs directly
connected to it. The two sides of the PVC can identify the same PVC by using their
logic-channel numbers, however, without the likelihood of causing any mistake.
This is why no strict distinction is made between "virtual circuit" and "logic
channel".
numbers of the logic-channels between the routers and the PBXs directly
connected to it. The two sides of the PVC can identify the same PVC by using their
logic-channel numbers, however, without the likelihood of causing any mistake.
This is why no strict distinction is made between "virtual circuit" and "logic
channel".
X.25 Subinterface
Configuration Example
Networking requirements
Configure multiple subinterfaces to connect with multiple peers on different
network segments on a physical interface. In the following figure, RouterA is
configured with two subinterfaces, which are connected with RouterB and
RouterC.
network segments on a physical interface. In the following figure, RouterA is
configured with two subinterfaces, which are connected with RouterB and
RouterC.
Networking diagram
Figure 76 X.25 subinterface configuration
Configuration procedure
1 Configure RouterA:
[3Com]interface serial 0/0/0
[3Com-Serial0/0/0]link-protocol x25 dte
[3Com-Serial0/0/0]x25 x121-address 100
a Create subinterface serial 0/0/0.1.
[3Com-Serial0/0/0]interface serial 0/0/0.1
[3Com-Serial0/0/0]interface serial 0/0/0.1
[3Com-Serial0/0/0.1]ip address 10.1.1.2 255.255.0.0
[3Com-Serial0/0/0.1]x25 map ip 10.1.1.1 x121-address 200
R o u te rB
P B X
P B X
P B X
L C 3
L C 4
L C 2 4 3
L C 2 4
L C 3
P B X
R o u te rA
R o u te rB
P B X
P B X
P B X
L C 3
L C 4
L C 2 4 3
L C 2 4
L C 3
P B X
R o u te rA
S0/0/0
S0/0/0
S0/0/0
S0/0/0
S2/0/0
RouterB
RouterC
RouterD
RouterA
S1/0/0