Table 8-3 Subnet Routing Example: Optional Vlan Ports; Using Vlans To Segregate Broadcast Domains - Nortel Alteon OS 42C4911 Application Manual

Alteon OS Application Guide

Using VLANs to Segregate Broadcast Domains

In the previous example, devices that share a common IP network are all in the same broadcast
domain. If you want to limit the broadcasts on your network, you could use VLANs to create
distinct broadcast domains. For example, as shown in the following procedure, you could cre-
ate one VLAN for the client trunks, one for the routers, and one for the servers.
In this example, you are adding to the previous configuration.
1. Determine which switch ports and IP interfaces belong to which VLANs.
The following table adds port and VLAN information:

Table 8-3 Subnet Routing Example: Optional VLAN Ports

VLAN
1
2
3
2. Add the switch ports to their respective VLANs.
The VLANs shown in
>> # /cfg/l2/vlan 1
>> VLAN 1# add port EXT1
>> VLAN 1# add port EXT2
>> VLAN 1# ena
>> VLAN 1# ../VLAN 2
>> VLAN 2# add port EXT3
>> VLAN 2# add port EXT4
>> VLAN 2# ena
>> VLAN 2# ../VLAN 3
>> VLAN 3# add port INT5
>> VLAN 3# add port INT6
>> VLAN 3# ena
150 Chapter 8: Basic IP Routing
Devices
First Floor Client Workstations
Second Floor Client Workstations
Primary Default Router
Secondary Default Router
Common Servers 1
Common Servers 2
Table 8-3 are configured as follows:
IP Interface Switch Port
2 EXT1
3 EXT2
1 EXT3
1 EXT4
4 INT5
4 INT6
(Select VLAN 1)
(Add port for 1st floor to VLAN 1)
(Add port for 2nd floor to VLAN 1)
(Enable VLAN 1)
(Select VLAN 2)
(Add port for default router 1)
(Add port for default router 2)
(Enable VLAN 2)
(Add port for default router 3)
(Select VLAN 3)
(Select port for common server 1)
(Enable VLAN 3)
VLAN #
1
1
2
2
3
3
42C4911, January 2007