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New Member

Routing vlans across a WAN

I have two sites on different VTP domains. Site A has a dsl router that site B needs to access over the WAN/T1. I have plugged the one of dsl router ports to a cisco port and assigned a vlan X to that port without a default gateway. I can access the dsl anywhere at site A by assigning that vlan X to another port. How can I have that vlan show up across the WAN at the site B.


Re: Routing vlans across a WAN

One really doesn't route vlans, Think of a subnet that is part of a vlan instead.

What kind of switches are you using ?

How is the wan t1 connected ? routers ?

If youhave both sites connected by routers, they can advertise the necessary subnets to each other, that way the clients can "see" the dsl device.

New Member

Re: Routing vlans across a WAN

Well, the subnet is provided by SWBELL, with 5 static ip's. Since, swbell is providing the me with the default gateway I wasn't sure how to advertise that subnet without adding a another default gateway in the MSFC config. The vlan I created doesn't have a network identifier. How does vlan X at site B know how to communicate with vlan X at site A?

The dsl router is connected to a cat4000 to a 6509 to a 7206 to the T1 with the same setup on the other side.


Re: Routing vlans across a WAN

ok, I'm going to make a couple of guesses here. the dsl router is saying its the default route ( probably with a static route statement. depending on

how your 2 7206's are configured for routing, they should be configured to redistribute static. that would pass the default route between sites.

as far as vlans communicating, your vlans are in subnets correct ? I would guess that the routers at each end have knowledge of those subnets

New Member

Re: Routing vlans across a WAN

Since your vlans at both sites are in different subnets, there should be no problem. You can either run a routing protocol or have static routes to reach to and fro.

Well I have no idea about DSL router.