3com 3031 Instruccion De Instalación
320
C
HAPTER
26: X.25
AND
LAPB C
ONFIGURATIONS
b Access the public packet network, and enable the router as DTE side
[3Com-Serial0/0/0]link-protocol x25 dte
[3Com-Serial0/0/0]x25 x121-address 30561001
[3Com-Serial0/0/0]x25 window-size 5 5
[3Com-Serial0/0/0]x25 packet-size 512 512
[3Com-Serial0/0/0]x25 vc-range bi-channel 1 32
[3Com-Serial0/0/0]x25 map ip 168.173.24.2 x121-address 30561002
[3Com-Serial0/0/0]x25 map ip 168.173.24.3 x121-address 30561003
2 Configure RouterB:
a Configure interface IP address.
[3Com]interface Serial 0/0/0
[3Com-Serial0/0/0]ip address 168.173.24.2 255.255.255.0
b Access public packet network, and enable the router as DTE side
[3Com-Serial0/0/0]link-protocol x25 dte
[3Com-Serial0/0/0]x25 x121-address 30561002
[3Com-Serial0/0/0]x25 window-size 5 5
[3Com-Serial0/0/0]x25 packet-size 512 512
[3Com-Serial0/0/0]x25 vc-range bi-channel 1 32
[3Com-Serial0/0/0]x25 map ip 168.173.24.1 x121-address 30561001
[3Com-Serial0/0/0]x25 map ip 168.173.24.3 x121-address 30561003
3 Configure RouterC:
a Configure interface IP address.
[3Com]interface Serial 0/0/0
[3Com-Serial0/0/0]ip address 168.173.24.3 255.255.255.0
b Access public packet network, and enable the router as DTE side
[3Com-Serial0/0/0]link-protocol x25 dte
[3Com-Serial0/0/0]x25 x121-address 30561003
[3Com-Serial0/0/0]x25 window-size 5 5
[3Com-Serial0/0/0]x25 packet-size 512 512
[3Com-Serial0/0/0]x25 vc-range bi-channel 1 32
[3Com-Serial0/0/0]x25 map ip 168.173.24.1 x121-address 30561001
[3Com-Serial0/0/0]x25 map ip 168.173.24.2 x121-address 30561002
Configuring VC Range
Networking requirements
The link layer protocol of the router interface Serial0/0/0 is X.25, and VC ranges as
follows: PVC range [1, 8], incoming-only channel range [9, 16], two-way channel
range [17, 1024], and outgoing-only channel range is disabled.
follows: PVC range [1, 8], incoming-only channel range [9, 16], two-way channel
range [17, 1024], and outgoing-only channel range is disabled.
Configuration procedure
[3Com]interface serial 0/0/0
[3Com-Serial0/0/0]link-protocol x25
[3Com-Serial0/0/0]x25 vc-range in-channel 9 16 bi-channel 17 1024
Transmitting IP
Datagrams via X.25 PVC
Networking requirements
In the following diagram, the PVC range that the packet network allows is [1, 8].
The PVC numbers assigned to RouterA and RouterB are 3 and 4. The IP network
addresses of Ethernets A and B are 202.38.165.0 and 196.25.231.0. It is required
to exchange route information between Ethernets A and B with RIP routing
The PVC numbers assigned to RouterA and RouterB are 3 and 4. The IP network
addresses of Ethernets A and B are 202.38.165.0 and 196.25.231.0. It is required
to exchange route information between Ethernets A and B with RIP routing