Web OS 10.0 Application Guide58 n Chapter 2: VLANs 212777-A, February 2002VLANs and Default GatewaysWeb OS allows you to assign different default gateways for each VLAN. You can effectivelymap multiple customers to specific gateways on a single switch. The benefits of segregatingcustomers to different default gateways are: Resource optimization Enhanced customer segmentation Improved service differentiationSegregating VLAN TrafficDeploy this feature in an environment where you want to segregate VLAN traffic to a config-ured default gateway. In Figure 2-6, VLANs 2 and 3 have different routing requirements.VLAN 2 is required to route traffic through default gateway 5 and VLAN 3 is required to routetraffic through default gateway 6.Figure 2-6 Default Gateways per VLANYou can configure 246 default gateways per VLAN with values starting from 5 through 250. Ifdefault 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 whena specific gateway that has been assigned to a VLAN is down.nortelnetworks.com192.168.20.200yahoo.com200.1.2.200Web SwitchVLAN 2 using Gateway 5172.21.2.1InternetVLAN 3 using Gateway 6172.21.3.1Gateway 5: 10.10.1.20Gateway 6: 10.10.1.30Gateway 1: 10.10.4.1Router 2VLAN 410.10.1.30Router 3VLAN 110.10.4.1IF 1: 10.10.1.1IF 2: 10.10.4.40IF 3: 172.21.2.200IF 4: 172.21.3.20012378Router 1VLAN 410.10.1.20
