From owner-freebsd-mobile Wed Nov 24 17:26:47 1999 Delivered-To: freebsd-mobile@freebsd.org Received: from hh.alink.net (hh.alink.net [207.135.127.85]) by hub.freebsd.org (Postfix) with ESMTP id 97AF7150D5 for ; Wed, 24 Nov 1999 17:26:45 -0800 (PST) (envelope-from mab@zildjian.hq.alink.net) Received: from zildjian.hq.alink.net (lc.alink.net [207.135.127.87]) by hh.alink.net (8.9.3/8.9.3) with ESMTP id RAA26760; Wed, 24 Nov 1999 17:17:40 -0800 (PST) Received: (from mab@localhost) by zildjian.hq.alink.net (8.9.3/8.9.3) id RAA54149; Wed, 24 Nov 1999 17:17:39 -0800 (PST) (envelope-from mab) From: Matt Braithwaite Reply-To: matt@braithwaite.net X-Attribution: mab X-Face: @fge8WW'#w^hZghU$,3gfTP2@56+jGR+wSn|.Ddh,5d6qi")q;sCrYh[W;z-]Q0avfG):{3&hq61!)x&&PUrp%upUD9v9bB2_bw-"0v(87+A`?=1+P`# To: Brad Karp Cc: matt@braithwaite.net, freebsd-mobile@freebsd.org Subject: Re: STRIP (was Re: richochet modems) References: <199911250053.TAA11655@dominator.eecs.harvard.edu> Mime-Version: 1.0 (generated by tm-edit 7.108) Content-Type: text/plain; charset=US-ASCII Date: 24 Nov 1999 17:17:39 -0800 In-Reply-To: Brad Karp's message of "Wed, 24 Nov 1999 19:53:07 -0500 (EST)" Message-ID: <86k8n74bf0.fsf@zildjian.hq.alink.net> Lines: 38 X-Mailer: Gnus v5.6.45/XEmacs 21.1 - "Big Bend" Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, 24 Nov 1999 19:53:07 -0500 (EST), Brad Karp 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