From: Bob Sinclair (bsin@xxxxxxxxx)
Date: Wed Feb 20 2002 - 11:31:21 GMT-3
----- Original Message -----
From: "Bob Sinclair" <bsin@erols.com>
To: "Williams, Glenn" <WILLIAMSG@PANASONIC.COM>
Sent: Wednesday, February 20, 2002 9:31 AM
Subject: Re: Local Area Mobility
Glenn,
Yes, that is what I am saying. I believe proxy arp (and therefore LAM) works o
n the basis of classful networks. But I would not stake your life on it. Woul
d be interested to see someone test this.
-Bob
----- Original Message -----
From: "Williams, Glenn" <WILLIAMSG@PANASONIC.COM>
To: "'Mannan Venkatesan'" <mv_lab@hotmail.com>; "lab" <ccielab@groupstudy.com>
Sent: Wednesday, February 20, 2002 8:51 AM
Subject: RE: Local Area Mobility
> Hi,
>
> Does your comment "All subnets connecting the two areas must be subnets of
> the same major net." mean that if a PC started out in the 135.10.5.0 subnet,
> moved to the 136.20.2.0 subnet, it would not work? Why?
> TIA
> GW
>
> -----Original Message-----
> From: Mannan Venkatesan [mailto:mv_lab@hotmail.com]
> Sent: Wednesday, February 20, 2002 7:43 AM
> To: lab
> Subject: Fw: Local Area Mobility
>
>
> ----- Original Message -----
> From: "Mannan Venkatesan" <mv_lab@hotmail.com>
> To: "Bob Sinclair" <bsin@erols.com>
> Cc: <Sandeepkulkarni@firstusa.com>
> Sent: Wednesday, February 20, 2002 8:41 AM
> Subject: Re: Local Area Mobility
>
>
> > Bob,
> > It is working without changing the default-gateway. Problem was iwth OSPF.
> > The router which was connected to the mobile host was not learning the
> > mobile host subnet.
> >
> > Thanks a lot,
> > Mannan
> >
> > ----- Original Message -----
> > From: "Bob Sinclair" <bsin@erols.com>
> > To: "Mannan Venkatesan" <mv_lab@hotmail.com>
> > Sent: Tuesday, February 19, 2002 3:20 PM
> > Subject: Re: Local Area Mobility
> >
> >
> > I am not sure what the problem is. Here are the steps that worked for me:
> >
> > 1. ip mobile arp on each of the ethernets I use for PC
> > 2. redistribute mobile under ospf
> >
> > Do not change default gateway on PC/router. Maker sure to clean out the
> arp
> > table after move. All subnets connecting the two areas must be subnets of
> > the same major net. You must redistribute mobile into a classless
> protocol
> > (EIGRP or OSPF)
> >
> > Let me know how it goes.
> >
> > ----- Original Message -----
> > From: "Mannan Venkatesan" <mv_lab@hotmail.com>
> > To: "Bob Sinclair" <bsin@erols.com>
> > Cc: <ccielab@groupstudy.com>
> > Sent: Tuesday, February 19, 2002 2:29 PM
> > Subject: Re: Local Area Mobility
> >
> >
> > > Bob,
> > > I tried it again and it didn't work even I enabled proxy arp. When I
> > changed
> > > the default gateway on the host pointing to the new router interface,
> then
> > > it worked. And the host ip address appeared as 'M' route. Any help?
> > >
> > > PS : I used a router as the host with 'no ip routing'
> > >
> > > 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
> > > > >
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:28 GMT-3