From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 24 Jan 2007 11:19:12 -0800 From: Stephen Hemminger Message-ID: <20070124111912.7c72de7f@freekitty> In-Reply-To: <8764B2C538F2C44B845C4B608D4515D31A48C6@EXVBE012-5.exch012.intermedia.net> References: <8764B2C538F2C44B845C4B608D4515D31A48C2@EXVBE012-5.exch012.intermedia.net> <45B7A3ED.4080607@schaus.ca> <8764B2C538F2C44B845C4B608D4515D31A48C6@EXVBE012-5.exch012.intermedia.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: Re: [Bridge] STP Loop not blocking List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jake Farrell Cc: bridge@lists.osdl.org On Wed, 24 Jan 2007 10:46:48 -0800 "Jake Farrell" wrote: > The setup is as follows > > ixp4xx #1: br0 (eth0, eth1, ath0, ath1) STP enabled > | | > | | > | | > ixp4xx #2: br0 (eth0, eth1, ath0, ath1) STP enabled > > with 2.6.16 one of the interfaces goes to blocking and the other is left to forward. In 2.6.18 the interfaces always stay forwarding. > > Jake > > > > > > Recently ran into a problem with the 2.6.18 kernel on Xscale arch when > > a bridge, with multiple interfaces on it, is configured with a > > redundant loop. All interfaces are left on forwarding and nexer switch > > to block when the loop is introduced. This was tested against a 2.6.16 > > kernel and the problem did not occur, interfaces forwared and blocked > > correctly. Any help would be appreciated. > > > Since you haven't give much detail on your setup (is stp enabled on both > bridges, for example), I'm not 100% clear what may be happening. But it > does sound like something I ran into before. > > See my post, and Stephen's reply: > http://lists.osdl.org/pipermail/bridge/2006-December/001573.html > > Cam There haven't been a huge number of bridge changes, perhaps STP got broken. Git bisect to a particular changeset would help -- Stephen Hemminger