Date: Tue, 4 Sep 2007 14:45:37 +0400 From: Eygene Ryabinkin <rea-fbsd@codelabs.ru> To: Shteryana Shopova <syrinx@FreeBSD.org> Cc: Tom Judge <tom@tomjudge.com>, Andrew Thompson <thompsa@freebsd.org>, net@freebsd.org Subject: Re: If_bridge and MST Message-ID: <20070904104537.GQ31819@void.codelabs.ru> In-Reply-To: <61b573980709040107t490632far990da52e5bfea3a1@mail.gmail.com> References: <46DC081F.6010203@tomjudge.com> <20070903173435.GA9902@heff.fud.org.nz> <46DC7AD0.4080800@tomjudge.com> <20070903210005.GA14592@heff.fud.org.nz> <61b573980709040107t490632far990da52e5bfea3a1@mail.gmail.com>
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Good day. Tue, Sep 04, 2007 at 11:07:22AM +0300, Shteryana Shopova wrote: > AFAIK, Cisco PVST is the predecessor of 802.1Q MSTP. If I remember > correctly one of the notable differences between the two is that with > Cisco PVST BPDUs are send for every spanning tree instance (also > tagged?) while with 802.1Q MSTP all information is contained in the > per instance M-records (MSTI Configuration Messages) in a single BPDU, > and BPDUs are only sent in instance 0. Yeah, according to http://www.cisco.com/warp/public/473/147.html this looks correct. Though I am not sure that BPDUs are sent only in the IST, but I can be wrong. -- Eygene
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