[nsp] VLAN settings on 2950s/2610s

[Sharan Harkisoon]

This is correct, I've had this issue when switching from a 7206 to a 3620.
I think the the 7206 didn't require "native" on the VLAN1 interface, and
worked fine.  Could have been a firmware issue.

Just make sure to add the "native" command on the end like Ryan suggested.

interface FastEthernet4/0.1
 encapsulation dot1Q 1 native


Sharan

----- Original Message -----
From: "Ryan O'Connell" <ryan at complicity.co.uk>
To: <security at cytanet.com.cy>; <cisco-nsp at puck.nether.net>
Sent: Friday, May 09, 2003 10:25 AM
Subject: Re: [nsp] VLAN settings on 2950s/2610s


> At 09/05/2003 16:12, Security wrote:
> >I spend several hours working with catalyst2950 switch and a Cisco2610
> >router trying to configure VLAN trunking using 802.1q. I Discover that
when
> >one of the VLANs is the default (VLAN1) trunking is not working. Using
> >other vlans e.g vlan2 and Vlan3 trunking is working perfectly. According
to
> >Cisco Documentation trunking should also work with VLAN1 as one of the
> >VLANs.
> >
> >Can anyone advise? I am thinking of a bug on the software of the switch
but
> >your advice will be appreciated
>
> Make sure you have Native (default) VLANs set properly both sides -
> switches have a default native VLAN and router don't. Anything in the
> native VLAN doesn't get tagged when being sent out, so the router will
drop
> it when receiving it unless one subinterface has been marked "native".
>
>  From memory, by default on the 2950 the default native VLAN is 1 so you
> need to make sure you use "encapsulation dot1q 1 native" on the 2610 for
> the appropriate subinterface. (This is from memory though, I may have it
wrong)
>
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