Date: 24 Nov 1999 17:17:39 -0800 From: Matt Braithwaite <matt@braithwaite.net> To: Brad Karp <karp@eecs.harvard.edu> Cc: matt@braithwaite.net, freebsd-mobile@freebsd.org Subject: Re: STRIP (was Re: richochet modems) Message-ID: <86k8n74bf0.fsf@zildjian.hq.alink.net> In-Reply-To: Brad Karp's message of "Wed, 24 Nov 1999 19:53:07 -0500 (EST)" References: <199911250053.TAA11655@dominator.eecs.harvard.edu>
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On Wed, 24 Nov 1999 19:53:07 -0500 (EST), Brad Karp <karp@eecs.harvard.edu> said: > > HUMR, of course, works mobile-node-to-Internet-gateway *and* mobile-node-to- > mobile-node. Right. STRIP does this too, but it's a kludge: a central node with a known hardware address has to be the ``ARP server'' for everybody else. By the way, have you noticed that the new radios use a different address format? They're ##-####-#### rather than ####-####. The Linux STRIP driver doesn't deal well with this, and I haven't updated mine either. > STRIP isn't *quite* a PPP substitute, even when used as a single hop from a > mobile node to an Internet gateway. PPP can assign "pseudo" link level > addresses to either side of a link, without either side knowing any sort > of "MAC address" for the other. STRIP requires configuration of MAC addresses > for the two sides of the link into an ARP table. Oh, yeah, I meant something more approximate, namely that STRIP works pretty well if all you want to do with your radio is talk to the Internet. > You don't need STRIP to do PPP--you can "dial" the MAC address of > the other modem, and get a reliable byte stream and *literally* run > PPP over it. So if you know the MAC addresses, you don't need the > STRIP code at all. Sorry, can you explain that a little more? Are you saying that given any two radios, you can set up a reliable byte stream between them using AT commands? Maybe I'm just not understanding what you're saying here. -- Matt Braithwaite Here in my car, I can only receive. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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