Date: Wed, 29 Mar 2006 07:35:19 +0000 (GMT) From: "Edward B. DREGER" <eddy+public+spam@noc.everquick.net> To: freebsd-net@freebsd.org Subject: Re: 802.3ad? Message-ID: <Pine.LNX.4.62.0603290716520.26548@pop.ict1.everquick.net> In-Reply-To: <20060329044558.GC20602@blar.home.comstyle.com> References: <20060328205624.GZ20678@gremlin.foo.is> <20060328215911.GA20602@blar.home.comstyle.com> <20060329002015.GI45591@overlord.e-gerbil.net> <20060329020343.GB20602@blar.home.comstyle.com> <20060329035645.GK45591@overlord.e-gerbil.net> <20060329044558.GC20602@blar.home.comstyle.com>
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B> Date: Tue, 28 Mar 2006 23:45:58 -0500 B> From: Brad B> Yes, 2 redundant paths represented by a virtual L2 interface is what he is B> asking for. VRRP is for providing L3 redundancy for the next hop. A completely B> different scenario. I hesitate to speak for others, but I'm pretty confident RAS knows that. ;-) B> > A properly designed system should be seperating out these layers B> > internally, in order to tie all of these features together under a common B> I'm not sure what exactly it is that you're describing above. It almost sounds B> as if you want a flat config with no config information split up by interfaces B> be it physical, virtual L2 or virtual L3. I can't say as I've seen *any* B> OS that can do that *exactly* as you describe. Sounds to me like a request for something analogous to netgraph(4), busdma(9), or scsipi(9). (A local attempt to integrate some custom FIB code in 4.x led me through some rather messy code. IIRC, I found several opportunities for better abstraction and lower cyclomatic code complexity. Perhaps memory fails me, or maybe things have changed.) B> trunking = 801.Q/ISL and nothing else. The IEEE has results from their "802.3 Trunking Study Group" available. If the body that writes the standard uses "802.3" and "trunking" together, I can see why others might do the same. B> link aggregation implies that all links are active. this is FAILOVER. there is B> no hash involved. [ Note: I didn't quite follow your pronoun/antecedent usage. ] There normally _is_ hashing involved with link aggregation. It's not part of the 802.3ad protocol per se, but devices spread traffic across the active links. Straight L2 devices hash on src/dst MAC addr. More intelligent counterparts inspect higher layers when selecting a link. Eddy -- Everquick Internet - http://www.everquick.net/ A division of Brotsman & Dreger, Inc. - http://www.brotsman.com/ Bandwidth, consulting, e-commerce, hosting, and network building Phone: +1 785 865 5885 Lawrence and [inter]national Phone: +1 316 794 8922 Wichita ________________________________________________________________________ DO NOT send mail to the following addresses: davidc@brics.com -*- jfconmaapaq@intc.net -*- sam@everquick.net Sending mail to spambait addresses is a great way to get blocked. Ditto for broken OOO autoresponders and foolish AV software backscatter.
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