From: Mannan Venkatesan (mv_lab@xxxxxxxxxxx)
Date: Tue Feb 19 2002 - 12:03:21 GMT-3
Bob,
Thanks for the info. Have you tried mobile ip? Can give us the sample config
for it? I tried it but the tunnel never came up.
Thanks,
Mannan
----- Original Message -----
From: "Bob Sinclair" <bsin@erols.com>
To: "Mannan Venkatesan" <mv_lab@hotmail.com>
Cc: <ccielab@groupstudy.com>
Sent: Monday, February 18, 2002 8:43 PM
Subject: Re: Local Area Mobility
Mannan,
Local Area Mobility relies on proxy arp. It requires the host to reboot or
otherwise clean out its arp table after the move. One of the requirements
of LAM is that all of the networks in the local area (the area in which LAM
is effective) be subnets of the same major network.
When the pc arps for the gateway, proxy arp on the router recognizes that
this pc is on the wrong subnet and tries to fix the problem for the pc by
responding with his own MAC address. The PC thinks he has the mac address
of his configured default gateway, but in fact has the local router
interface mac address. With regular proxy arp, the router gets the data
packet and passes it on to the destination. LAM adds the ability to
distribute host routes for stations on the "wrong" subnet, so all routers
know that this particular PC is not located with the rest of the hosts with
the same subnet address.
One confusing thing: LAM is similar to but much simpler than IP Mobility.
IP Mobility is quite complex, does not require rebooting, and relies on
tunneling rather than proxy arp and host routes.
I just tried it and it works for me, without bridging.
-Bob
----- Original Message -----
From: "Mannan Venkatesan" <mv_lab@hotmail.com>
To: "Sandro Ciffali" <sandyccie@yahoo.com>; <ccielab@groupstudy.com>
Sent: Monday, February 18, 2002 10:34 AM
Subject: Re: Local Area Mobility
> Ok, if you move the mobile host to e0/0, don't you have to change the
> default gateway on the host to 10.10.40.3??? And then, routing for your
> mobile host is done by LAM. If you do that, why do you need bridging?
What
> if you move the host to different router? You can also use IRDP.
>
> HTHs,
> Mannan
>
> ----- Original Message -----
> From: "Sandro Ciffali" <sandyccie@yahoo.com>
> To: <ccielab@groupstudy.com>
> Sent: Sunday, February 17, 2002 10:50 PM
> Subject: Local Area Mobility
>
>
> > Group,
> > Here is what i am trying to do.
> >
> > R3 has two ethernet ports, E0/0 and E0/1. E0/0 has ip
> > address 10.10.40.3/24, E0/1 has ip address
> > 10.10.70.2/24. I have a mobile host on this network
> > which i want to keep mobile from E0/0 to E0/1, The
> > mobile host has a ip 10.10.70.1/24.
> > I configred mobile arp timers for the two ethernet
> > ports fine. Did a redistribute mobile under my Eigrp
> > routing protocol,
> > This sims to be working fine. I have following
> > question.
> > If this host moves to E0/0, Now he is on 10.10.40.0/24
> > network, So how can the reply from 10.10.70.1/24 host
> > be replied?
> > To salve this issue i configured transparent bridging
> > between two ethernet ports and it worked fine. Is this
> > right way of doing it??? If yes then let us say we
> > have a mobile host that is not in either of above two
> > networks how will the reply from this host be routed
> > back to the originator?
> >
> > Can some one pls. reply to the above question?
> >
> > Thanks
> > Sandro
> >
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