[c-nsp] Routed Vlans

Tom Storey tom at snnap.net
Sun Sep 2 04:39:05 EDT 2007


Are the hosts in VLAN 25 on either switch supposed to be in the same IP
subnet, or different subnets?

If you have, say, a dot1q trunk between the two switches there is no reason
that traffic should be routed between the two, simply make sure that VLAN 25
is trunked to each opposing switch and it should be fine.

Otherwise, post the snippets of relevant config from either end and Im sure
someone on this list can help you out.

Cheers,
Tom

----- Original Message -----
From: "Hitesh Vinzoda" <vinzoda.hitesh at gmail.com>
To: "Cisco Mailing list" <cisco-nsp at puck.nether.net>
Sent: Sunday, September 02, 2007 3:26 PM
Subject: [c-nsp] Routed Vlans


> Dear All,
>
> I have got a Layer 3 switch attached to a layer 3 switch and ospf running
> between them. the link between them is a layer 2 trunk.just because i have
> to extend a vlan which is behind the trunk.
>
> when i perform TRACERT i can see the ip of the interfaces of both
switches.
> does this mean the traffic is routed even if it is going L2 trunk.
>
> I want to route the Vlan over routed link and function as layer 2 vlan. is
> it possible...?
>
> means
>
> *PC (VLAN 25) >>>>>>> L3 Switch>>>>Trunk + OSPF>>>>>>L3 switch >>>>>PC
> (VLAN25)*
>
> I want the VLans to travel to a routed link instead of that right now it
is
> going through a configured trunk.
>
> Please advice.
>
> Thanks & Regards
>
> Ronnie
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