3com 3031 Instruccion De Instalación

Typical X.25 Configuration Example

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d Specify X.121 address of this interface.

[3Com-Serial1/0/0]x25 x121-address 20112452

e Specify address mapping to the peer.

[3Com-Serial1/0/0]x25 map ip 202.38.160.1 x121-address 20112451

As this is a direct connection, the traffic control parameters can be increased
slightly.

[3Com-Serial1/0/0]x25 packet-size 1024 1024

[3Com-Serial1/0/0]x25 window-size 5 5

Connecting the Router

to X.25 Public Packet

Network

Networking requirements

As shown in the following diagram, Routers A, B, and C are connected to the
same X.25 network for the purpose of communications. The requirements are:

■

IP addresses of the interfaces Serial0/0/0 of the three routers are 168.173.24.1,
168.173.24.2 and 168.173.24.3 respectively.

■

X.121 addresses assigned to the three routers by the network are 30561001,
30561002 and 30561003 respectively.

■

Standard window size supported by the packet network: both receiving
window and sending window are 5.

■

Standard maximum packet length: both maximum receiving packet length and
maximum sending packet length are 512.

■

Channel range: permanent virtual circuit section, incoming-only channel range
and outgoing-only channel range are disabled, and two-way channel range is
[1, 32].

Networking diagram

Figure 73 Connecting the router to X.25 public packet network

Configuration procedure

1 Configure RouterA:

a Configure interface IP address.

[3Com]interface Serial 0/0/0

[3Com-Serial0/0/0]ip address 168.173.24.1 255.255.255.0

RouterA

RouterB

RouterC

Serial0/0/0

IP: 168.173.24.1

X.121: 30561001

IP: 168.173.24.2

X.121: 30561002

X.25

windowsize: 5 5

packetsize: 512 512