[c-nsp] Routed Vlans

Aaron Riemer aaronis at people.net.au
Sun Sep 2 09:56:48 EDT 2007


Hi, 

If both sides are in same vlan / subnet then there is no need for any
routing to take place. Traffic between these vlan members will travel across
the trunk without any need to consult the routing table since the network
should be 'directly connected'. 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Hitesh Vinzoda
Sent: Sunday, 2 September 2007 1:56 PM
To: Cisco Mailing list
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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