Re: [nsp] Re(2): Native VLAN?

From: Stephen Sprunk (ssprunk@cisco.com)
Date: Fri Feb 08 2002 - 11:44:15 EST


Thus spake "Angelo De Guzman" <a.deguzman@wesolv.com.ph>
> I have a follow up question regarding these native
> VLAN.I have a client who has two 6509 and the connection
> in between the two is through a trunk port. What keeps
> me wondering is that each VLAN 1 one on both switch has
> a different ip network.
...
> Catalyst6509A
>
> interface Vlan 21
> ip address 192.168.21.1 255.255.255.0
>
> Catalyst6509B
>
> interface Vlan 21
> ip address 197.77.77.1 255.255.255.0
>
> Why dont I get errors on these? Like conflict vlan
> id or something weird..(just guessing).

There is nothing invalid about configuring two routers on the same Ethernet
with two different subnets. Imagine the same configuration with two 2500's
plugged into a hub.

Of course, this probably isn't what you intended to do.

S



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