From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 27 Apr 2007 11:48:14 -0700 From: Stephen Hemminger Subject: Re: [Bridge] Re: PVST Message-ID: <20070427114814.66962558@freekitty> In-Reply-To: References: <20070426210721.3fcf9f08@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Benny Amorsen Cc: bridge@linux-foundation.org On 27 Apr 2007 15:43:00 +0200 Benny Amorsen wrote: > >>>>> "SH" == Stephen Hemminger writes: > > SH> Someone had sent some patches to do PVST, but PVST seems to be > SH> Cisco centric. and the patched version was too inflexible, so I > SH> didn't put it in mainline. > > PVST is indeed Cisco centric. It is also the only way to stay sane if > you have several VLAN's. > > However, isn't PVST the same as making a br100 out of eth0.100 and > eth1.100, and turning STP on? Hopefully the STP packets should then > emerge with a VLAN tag of 100. > > > /Benny > > > _______________________________________________ > Bridge mailing list > Bridge@lists.linux-foundation.org > https://lists.linux-foundation.org/mailman/listinfo/bridge The problem is if you bridge two vlan's then the Cisco box will see two STP bpdu's arrive, and conclude that there is a cycle and bring the link down. -- Stephen Hemminger