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PPP/MLPPP ->mobileIP

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Sync

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Oct 9, 2001, 4:13:26 PM10/9/01
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Hi,
I'd like to do an application/driver for automatic switching about two
device, such as wireless lan 802.11 and mobile phone GSM/GPRS, so i'd like
to know if someone had done this thing, and if is it possible to utilize
mobile IP technology with MultiLink PPP.
Can MultiLink PPP does it?
Can MultiLink PPP monitoring two different device such those?

Thanks a lot.


James Carlson

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Oct 9, 2001, 8:43:48 AM10/9/01
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"Sync" <mauro....@nergal.it> writes:
> I'd like to do an application/driver for automatic switching about two
> device, such as wireless lan 802.11 and mobile phone GSM/GPRS, so i'd like
> to know if someone had done this thing, and if is it possible to utilize
> mobile IP technology with MultiLink PPP.
> Can MultiLink PPP does it?

I don't know if that question makes sense. 802.11 doesn't use PPP as
a datalink layer; it uses Ethernet. GSM/GPRS does use PPP, though.

In addition, Mobile IP is done at the network layer (IP), while
Multilink PPP is done at the link layer (PPP). I don't see any
particular reason that they'd have much to do with each other.

On top of that, Multilink PPP is just link aggregation. It's not
really designed for "automatic switching;" whatever that might be.

> Can MultiLink PPP monitoring two different device such those?

Multilink PPP neither knows nor cares what the lower layers are. It
just aggregates PPP links.

--
James Carlson, Solaris Networking <james.d...@east.sun.com>
SUN Microsystems / 1 Network Drive 71.234W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.497N Fax +1 781 442 1677

Sync

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Oct 9, 2001, 4:52:40 PM10/9/01
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Well, I know that RFC 2516 deal with PPP over ethernet, and my problem is to
develope an application for seamless mobility from WLAN to WWAN (GSM/GPRS)
and reciprocal. A software application on mobile device has to administrar
handoff procedure (indoor/outdoor).

Regards


James Carlson

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Oct 9, 2001, 5:46:46 PM10/9/01
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"Sync" <elm...@tiscalinet.it> writes:
> Well, I know that RFC 2516 deal with PPP over ethernet, and my problem is to
> develope an application for seamless mobility from WLAN to WWAN (GSM/GPRS)
> and reciprocal.

OK. What does Multilink PPP have to do with that? I would think that
Mobile IP is likely to be what you're after.

> A software application on mobile device has to administrar
> handoff procedure (indoor/outdoor).

True. Actually, in a reasonable deployment, there are multiple
handoffs to consider. Some are done within L2 and some are more
appropriate at L3. The L2 handoffs are the traditional cellular
ones. The L3 handoffs would involve Mobile IP.

I still don't see where you're going with Multilink PPP ...

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