Vlans And Default Gateways; Segregating Vlan Traffic; Figure 2-6 Default Gateways Per Vlan - Nortel Web OS Switch Software Application Manual

Web OS 10.0 Application Guide

VLANs and Default Gateways

Web OS allows you to assign different default gateways for each VLAN. You can effectively
map multiple customers to specific gateways on a single switch. The benefits of segregating
customers to different default gateways are:
n
Resource optimization
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Enhanced customer segmentation
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Improved service differentiation

Segregating VLAN Traffic

Deploy this feature in an environment where you want to segregate VLAN traffic to a config-
ured default gateway. In
VLAN 2 is required to route traffic through default gateway 5 and VLAN 3 is required to route
traffic through default gateway 6.
nortelnetworks.com
192.168.20.200
yahoo.com
200.1.2.200

Figure 2-6 Default Gateways per VLAN

You can configure 246 default gateways per VLAN with values starting from 5 through 250. If
default gateways per VLAN fail, then traffic is directed to default gateways 1 through 4.
Default gateways 1 through 4 are used for load balancing session requests and as backup when
a specific gateway that has been assigned to a VLAN is down.
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58 Chapter 2: VLANs
Figure 2-6, VLANs 2 and 3 have different routing requirements.
Router 1
VLAN 4
10.10.1.20
Internet
Router 2
VLAN 4
10.10.1.30
Router 3
VLAN 1
10.10.4.1
Gateway 5: 10.10.1.20
Gateway 6: 10.10.1.30
Gateway 1: 10.10.4.1
7
1
Web Switch
2
3
8
IF 1: 10.10.1.1
IF 2: 10.10.4.40
VLAN 2 using Gateway 5
172.21.2.1
IF 3: 172.21.2.200
IF 4: 172.21.3.200
VLAN 3 using Gateway 6
172.21.3.1
212777-A, February 2002