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7.8

Trunking VLANs over a Layer 3 network

Asked by ian_chard in Network Routers, Miscellaneous Networking, Network Switches & Hubs

Tags: 3, layer, over, trunking, vlan

Trunking VLANs over Layer 3 OSPF links.

What is the best way to trunk a Layer 2 VLAN over a routed layer 3 network? I have a problem whereby the network is split up into 3 seperate sites, each site has a number of VLANS which are routed using OSPF and Cisco layer 3 switches.

There are 2 VLANS which need to span ALL sites and can not be split into different IP segments.

Is it possible to just Trunk the VLANS over the current Layer 3 links? We are using a mixture of Cisco 6500, 3550 and 3750 switches to do the switching and routing.

There is only 1 physical connection between the sites.

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Trunking VLANs over a Layer 3 network

Asked by ian_chard in Network Routers, Miscellaneous Networking, Network Switches & Hubs

Tags: 3, layer, over, trunking, vlan

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