From: Jonathan V Hays (jhays@jtan.com)
Date: Mon Jun 30 2003 - 20:34:39 GMT-3
Yes - I did mean R2 and R4, sorry. Too much multitasking. ;-)
Thanks for the idea - I'll check on it.
Jonathan
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of Jean-Francois Vaillancourt
> Sent: Monday, June 30, 2003 6:45 PM
> To: Jonathan V Hays; 'Joe Martin'; boby2kusa@hotmail.com;
> ccielab@groupstudy.com
> Subject: RE: bridging removes port from 3550 vlan
>
>
> At 2003-06-30, you wrote:
> >3550-fa0/2-[vlan2]-e0-R2-s0-WAN-s0-R4-e0-[vlan4]-fa0/4-3550
> >
> >The ports R1-e0 and R3-e0 and have "bridge-group 1"
> configured and are
>
> You mean R2 & R4, right? The routers straight on the 3550?
>
> >However, the point is that the 3550 switch is not bridging
> anything. If
> >I had a hosts plugged into vlans 2 and 4 the frames would be
> forwarded
> >to the routers by the 3550, bridged by the routers and
> forwarded across
> >the WAN using DLSW. In fact there are no SNA or NetBIOS frames being
> >generated on either vlan. Nonetheless, as soon as I configure
> >"bridge-group 1" on the ethernet ports of the routers, the
> 3550 starts
> >acting up by removing those ports from their respective
> vlans (and later
> >reinstating them for a few seconds before removing them again.). This
> >will happen even before I configure any dlsw commands.
>
> I had a similar problem, but on a 3524XL. In my case it
> turned out that the
> switch was getting confused by learning the same MACs from 2 vlans. I
> didn't try without the DLSW, though.
>
> Are you getting ADDR_FLAP error messages on the 3550, like
> "relearning zyx
> addresses per minute"? If not, it would be interesting to see
> your STP debugs.
>
> JF
>
>
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