From: Ed Lui (edwlui@gmail.com)
Date: Fri May 13 2005 - 11:49:22 GMT-3
Jong Soo answered the question already. Which was my answer, too. Just
did not post it.
On 5/13/05, Dillon Yang <dillony@gmail.com> wrote:
> Hi, Tim:
>
> Do you mean that the link between cat and rt is dot1q trunk?
>
> regard
> dillon
>
> On 5/13/05, ccie2be <ccie2be@nyc.rr.com> wrote:
> > Fallback Bridging won't work for this scenario.
> >
> > Brian posted the solution to this problem yesterday.
> >
> > To get this to work, you have to configure different native vlans on the
> > trunk connecting the 2 3550's and disable stp and prevent the different
> > native vlan from being pruned.
> >
> > Tim
> >
> > -----Original Message-----
> > From: Dillon Yang [mailto:dillony@gmail.com]
> > Sent: Friday, May 13, 2005 8:48 AM
> > To: ccie2be
> > Cc: Group Study
> > Subject: Re: Same subnet, different vlans
> >
> > Hi, Tim:
> >
> > <quote>
> > With fallback bridging, the switch bridges together two or more VLANs
> > or routed ports, essentially
> > connecting multiple VLANs within one bridge domain. Fallback bridging
> > forwards traffic that the switch
> > does not route and forwards traffic belonging to a nonroutable
> > protocol such as DECnet.
> > </quote>
> > You can find this in config of c3550.
> >
> > HTH
> > dillon
> >
> > On 5/13/05, ccie2be <ccie2be@nyc.rr.com> wrote:
> > > Hey guys,
> > >
> > > I'm stumped on this one.
> > >
> > > Here's the scenario:
> > >
> > > rtr-1 ------------- Cat-1 --- Cat-2 ----------------- rtr-2
> > > .2 < vlan 2 > < vlan 20> .254
> > >
> > > | < 192.10.1.x/24 >|
> > >
> > > As you can see, both routers are in the same subnet but the ports they
> > > connect to are assigned to different vlan's.
> > >
> > > There's an 802.1q trunk connecting the Cat's.
> > >
> > > Broadcast traffic from rtr-1 should reach rtr-2 and vice versa.
> > >
> > > I thought about 802.1q tunneling and fallback bridging but neither
> > approach
> > > seems to work or be the right way to approach this.
> > >
> > > Anyone have any ideas?
> > >
> > > TIA, Tim
> > >
> > > _______________________________________________________________________
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>
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