[nsp] VLAN settings on 2950s/2610s

[Sharan Harkisoon]

This feature was added to later versions of  IOS, so you can do VLAN tagging
on 10meg ports.

Sharan

----- Original Message -----
From: "Pete Templin" <pete.templin at texlink.com>
To: <security at cytanet.com.cy>; "Sharan Harkisoon" <sharan at sharktek.net>
Cc: <cisco-nsp at puck.nether.net>
Sent: Saturday, May 10, 2003 1:36 PM
Subject: RE: [nsp] VLAN settings on 2950s/2610s


> 2610 routers have one Ethernet and zero Fast Ethernet interfaces.  Last I
checked (which admittedly was a long time ago), Fast Ethernet was required
for VLANs.
>
> Pete Templin
> IP Network Engineer
> TexLink Communications
> (210) 892-4183
> pete.templin at texlink.com
>
> -----Original Message-----
> From: Security [mailto:security at cytanet.com.cy]
> Sent: Saturday, May 10, 2003 1:48 PM
> To: Sharan Harkisoon
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [nsp] VLAN settings on 2950s/2610s
>
> The use of the native command did not help. I used it on the subinterface
> of the cisco2610 and also on the trunk port on the switch. The only way to
> make trunking work was to configure two VLANs on the 2950 switch without
> using VLAN1. I am thinking to proceed and upgrate the switch software
> and/or the router IOS to see what will happen.
>
>
> >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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> >>
> >
> >
> >
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