From: Ivan (ivan@iip.net)
Date: Tue Jul 31 2007 - 09:47:01 ART
Think that this the same as briding at L3 device.
On Tuesday 31 July 2007 15:36, Djerk Geurts wrote:
> It's done if nothing else is available but from experience I know that one
> needs to take special care not to upset ARP caches and CAM tables. One
> might have to override the bia for some SVI's.
>
> Djerk
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > Behalf Of Carlos G Mendioroz
> > Sent: dinsdag 31 juli 2007 12:50
> > To: Ben
> > Cc: martijn; ccielab@groupstudy.com
> > Subject: Re: Bridging VLANs by looping cable
> >
> > Hmm, you are for a surprise if you think so.
> > Yes, this works, and there are some setups where this may
> > prove useful.
> >
> > Like some switches that only support one private vlan promiscuous port
> > and you need to connect a couple.
> > Or some restrictions on where you can rate limit on some
> > architectures.
> > (E.g. you can go to a real L3 interface from a L2 access)
> >
> > Nothing really clean, and I would not recomend doing that
> > anywhere, but
> > works... like most hacks.
> >
> > -Carlos
> >
> > Ben @ 31/07/2007 07:13 -0300 dixit:
> > > Martijn,
> > >
> > > VLANs by design confine traffic to the vlan, unless it has
> >
> > been routed
> >
> > > across to another vlan. Merely connecting a cable between two VLANs
> > > therefore does not circumvent this behavior, even if hosts
> >
> > in the two vlans
> >
> > > use the same IP subnet.
> > >
> > > Ben
> > >
> > > On 7/31/07, martijn <groupstudy@martijnj.nl> wrote:
> > >> Lim,
> > >>
> > >> i needed to laugh a little at first. Never tried.
> > >>
> > >> Not THE answer, I think you need to test.
> > >>
> > >> let's break up your q's.
> > >>
> > >>> done before?
> > >>
> > >> No.
> > >>
> > >>> Can a host on VLAN359 now communicate with a host on VLAN360?
> > >>
> > >> After i read your post trice, i see you want to do it @
> >
> > one switch. when i
> >
> > >> want to do comms with an host it starts with ip, if that
> >
> > is not local
> >
> > >> (logical AND) I go for the default gateway. Do your pc's have
> > >> one?????????????
> > >>
> > >> When I look to your Q form another angle, say mac-addr
> >
> > table, (never
> >
> > >> tested,
> > >> group?) I would say mac-addr binding goes to direct
> >
> > connected prot first,
> >
> > >> after that I assume that the link would for a L2 link
> >
> > between vlan's. Any
> >
> > >> takes?
> > >>
> > >> martijn
> > >>
> > >> ----- Original Message -----
> > >> From: "Toh Soon, Lim" <tohsoon28@gmail.com>
> > >> To: <ccielab@groupstudy.com>
> > >> Sent: Tuesday, July 31, 2007 9:43 AM
> > >> Subject: Bridging VLANs by looping cable
> > >>
> > >>> Hi All,
> > >>>
> > >>> This may sound simple and mundane but for curiosity sake,
> >
> > I need to seek
> >
> > >>> clarification.
> > >>>
> > >>> Has anyone tried "bridging" two VLANs by looping a cable
> >
> > to the same
> >
> > >>> switch?
> > >>> E.g. in the following diagram:
> > >>>
> > >>> Gi0/1(VLAN359)----
> > >>>
> > >>>
> > >>> Gi0/2(VLAN360)----
> > >>>
> > >>> The same cable connects to interfaces Gi0/1 (VLAN359) and Gi0/2
> > >>
> > >> (VLAN360).
> > >>
> > >>> Can a host on VLAN359 now communicate with a host on VLAN360?
> > >>>
> > >>> What's the implication doing this, e.g. from STP point of
> >
> > view? Is it
> >
> > >>> recommended at all?
> > >>>
> > >>> Any advice is appreciated.
> > >>>
> > >>>
> > >>> Thank you.
> > >>>
> > >>> B.Rgds,
> > >>> Lim TS
> >
> > ______________________________________________________________
> > _________
> >
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> > ______________________________________________________________
> > _________
> >
> > >> Subscription information may be found at:
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> >
> > ______________________________________________________________
> > _________
> >
> > > Subscription information may be found at:
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> >
> > --
> > Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
> >
> > ______________________________________________________________
> > _________
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> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
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