From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon Oct 30 2006 - 15:47:24 ART
The ARP request will always come in from a host on a directly
connected segment. If the router has a route to the ARP's destination
and proxy-arp is enabled on the connected link that the ARP was received
the router will reply with its own MAC address. The destination does
not have to be connected, it just has to be in the routing table.
Diagram out your topology and let me know exactly what you are
trying to accomplish and I can give you a better recommendation.
HTH,
Brian McGahan, CCIE #8593 (R&S/SP)
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Venkataramanaiah.R
> Sent: Monday, October 30, 2006 10:59 AM
> To: Brian McGahan
> Cc: ccielab@groupstudy.com
> Subject: Re: Proxy-Arp with two routers on a segment..
>
> Brian, Moreover, you suggestion will apply only if i am proxy arping B
> from A and vice versa.. But when i arp any other subnets, both routers
> will have these routers..
>
> In any case, i think bill's understanding with this issue is correct.
> Routers seem to responding only to the connect hosts. (They verify
> source addresses before responding with MAC). However, in our case,
> our legacy hosts, which uses same NIC for both subnets, never uses
> second subnet to ask for MAC. So always R1 responds..
>
>
>
> On 10/30/06, Venkataramanaiah. R <vramanaiah@gmail.com> wrote:
> > Brian, I like your advise, but i cannot do that, i want this
> > intercommunication to around via both routers..
> >
> > It is a strange topology that we are trying to build upon here, with
> > legacy telcom hosts. So bear with me for that ;-)
> >
> > thanks
> >
> >
> > On 10/30/06, Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
> > > You will only reply with proxy-arp if you have a route to the
> requested
> > > host's subnet. Remove router 1's route to subnet 2 and remove
router
> > > 2's route to subnet 1 and you will see the desired behavior.
> > >
> > >
> > > HTH,
> > >
> > > Brian McGahan, CCIE #8593 (R&S/SP)
> > > bmcgahan@internetworkexpert.com
> > >
> > > Internetwork Expert, Inc.
> > > http://www.InternetworkExpert.com
> > > Toll Free: 877-224-8987 x 705
> > > Outside US: 775-826-4344 x 705
> > > 24/7 Support: http://forum.internetworkexpert.com
> > > Live Chat: http://www.internetworkexpert.com/chat/
> > >
> > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf
> > > Of
> > > > Venkataramanaiah.R
> > > > Sent: Saturday, October 28, 2006 1:09 PM
> > > > To: ccielab@groupstudy.com
> > > > Subject: Proxy-Arp with two routers on a segment..
> > > >
> > > > I have a requirement where there will be two routers on the same
> > > > segment supporting two different subnets... The segments have
hosts
> > > > belonging to both these subnets..
> > > >
> > > > I want to enforce the following..
> > > >
> > > > Router 1 must respond to proxy-arp request only from hosts
belonging
> > > > to Subnet 1.
> > > >
> > > > Router 2 must respond to proxy-arp request only from hosts
belonging
> > > > to Subnet 2.
> > > >
> > > > Is there a way out..? I cant think of any way to achieve this,
so
> > > > thought i will ask the experts :-)
> > > >
> > > >
> > > > Regards
> > > > -Venkat
> > > >
> > > >
> > >
>
This archive was generated by hypermail 2.1.4 : Wed Nov 01 2006 - 07:29:07 ART