3Com 09-1324-000 manual Assigning Internet, Addresses to a Bridge

Assigning Internet

This section describes how to assign one or more Internet addresses to the system

Addresses

using the NETaddr parameter in the IP Service. Before you assign an Internet

address, you must determine:

■ Whether you want your network to connect to the Internet, and how to obtain

a unique Internet address.

■ Whether you want to use the system as a bridge, a router, or a bridge/router.

■ Whether you need subnet addressing.

If you have already decided on these issues, proceed to “Assigning Internet

Addresses to a Bridge” on page 6-20or to “Assigning Internet Addresses to a

Router” on page 6-21.If you need more information to make your decision, refer

to “Obtaining an Internet Address” on page 6-21and to the subnet information

in the Using NETBuilder Family Software.

Assigning Internet

Even though a bridge does not route IP traffic, it needs an Internet address to

Addresses to a Bridge

participate in network management and to be accessible from other devices

through Telnet or the SNMP.

When assigning an Internet address to an entire bridge, assign the address to

port 0 using:

SETDefault !0 -IP NETaddr = <IP address>

An Internet address assigned to port 0 is considered an Internet address for the

entire bridge.

The following example illustrates how to assign an Internet address to a bridge.

Example

Figure 6-3shows a configuration in which you need to assign an Internet address

to a bridge. Hosts A and B are two hosts belonging to the same IP network,

network 10. The IP host on Network A has an Internet address 10.0.0.1, and the

one on Network B has an Internet address 10.0.0.2. The bridge forwards packets

between these segments. To allow communication between the hosts and the

bridge, ports 1 and 2 must reside on the same network. Assigning the same

network number to two or more bridge ports is prohibited, so you must assign the

address to the entire bridge, entering a command similar to the following:

SETDefault !0 -IP NETaddr = 10.0.0.3

IP address

IP

A

IPX

OSI

= 10.0.0.1

host

host

host

Segment A

Assign IP address 10.0.0.3 to Port 0

Port 1

Bridge

for the IP hosts to access the bridge

Segment B

Port 2