From: Scott Morris (swm@emanon.com)
Date: Thu Sep 01 2005 - 11:15:28 GMT-3
I'm not sure about the whole scenario to beging with. Mobile IP
registrations aren't broadcast. They are specifically unicast to either the
foreign-agent (learned/solicited) or directly to the home-agent (programmed
into the client). They're on UDP/434 for a destination, but are not
broadcast.
The client can request that the HA forward on any received broadcasts from
the home network (likely to get obnoxious things like MS-networking to
work), but that's going the other way, and still involves the HA setting up
the L3 tunnel through the FA to it (typical Mobile IP setup).
The client is allowed to use a subnet-level broadcast IP, but only when
registering directly with the HA. And in this case, there's no magic since
every intermmediate router will forward it just like any other packet. The
HA network would need to have "ip directed-broadcast" enabled, but that's
about it.
I'm thinking this is more of a scenario created by someone who didn't know
how Mobile IP worked.
RFC2002 is where all this stuff is spelled out.
So in order to make this work, you'd need to know the Mobile IP address
(destination) or work on the tunneled packets, assuming that R6 is a Foreign
Agent, then use NAT or something like that in order to forward things on to
BB1. It's technically not an accurate thing to think about doing though.
:)
HTH,
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
joshua lauer
Sent: Thursday, September 01, 2005 8:26 AM
To: nhqky888@ybb.ne.jp; ccielab@groupstudy.com
Subject: Re: UDP broadcast for Moblile IP
Ip forward protocol with IP helper is what I would use...you can forward
mobile-ip registrations which are udp...I'm not sure about your
configuration but that's what it appears to me what you are trying to do..
jl
----- Original Message -----
From: <nhqky888@ybb.ne.jp>
To: <ccielab@groupstudy.com>
Sent: Thursday, September 01, 2005 1:22 AM
Subject: UDP broadcast for Moblile IP
> Hi all,
>
> BB1------R1-------R-------R------R--------R6------BB2
>
>
> The reqirement is that;
>
> Between BB1 and BB2 is a few hop away,
> UDP broadcast for Mobile IP is sent from BB2 to R6.
> This traffic should be flooded to BB1.
> No UDP port info or multicast group address is given to you.
>
>
> Please show up the best solution to me.
>
>
> KY
>
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