From: Francesco Dolcini <fdolcini@sysnetsistemi.it>
To: joakim.tjernlund@transmode.se
Cc: Bridge@lists.linux-foundation.org
Subject: Re: [Bridge] STP bug, loop not detetcted
Date: Thu, 08 May 2008 11:04:11 +0200 [thread overview]
Message-ID: <4822C20B.3050303@sysnetsistemi.it> (raw)
In-Reply-To: <1210233718.32216.121.camel@gentoo-jocke.transmode.se>
Joakim Tjernlund wrote:
> On Thu, 2008-05-08 at 02:16 +0000, richardvoigt@gmail.com wrote:
>> If a bridge receives one of its own STP packets on the same interface
>> from which it was sent, that indicates a loop elsewhere in the network
>> that disabling an interface locally will not fix, therefore STP takes
>> no action.
>
> I see, would it hurt something else if STP did turn off it interface in
> this case? Optical i/f's is getting more common so these types of loops
> will increase so I think this needs to be addressed.
>
cisco and others solved this kind of problem using proprietary
unidirectional link detection protocols (see cisco informational rfc
5171 for example). No standard exists as far as I know (BFD rfc does not
consider the layer 2 case).
I am working on an custom udld protocol implementation at the moment ...
> Any chance Rapid STP will fix my problem?
no
next prev parent reply other threads:[~2008-05-08 9:04 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-07 9:22 [Bridge] STP bug, loop not detetcted Joakim Tjernlund
2008-05-07 9:33 ` Jaime Nebrera
2008-05-07 10:40 ` Benny Amorsen
2008-05-07 10:42 ` Benny Amorsen
2008-05-08 2:16 ` richardvoigt
2008-05-08 8:01 ` Joakim Tjernlund
2008-05-08 9:04 ` Francesco Dolcini [this message]
2008-05-08 10:01 ` Joakim Tjernlund
2008-05-08 12:13 ` Francesco Dolcini
2008-05-08 12:58 ` Joakim Tjernlund
2008-05-12 9:37 ` Joakim Tjernlund
2008-05-12 17:50 ` Stephen Hemminger
2008-05-12 17:54 ` Joakim Tjernlund
2008-05-13 3:10 ` richardvoigt
2008-05-13 7:35 ` Joakim Tjernlund
2008-05-13 8:41 ` Benny Amorsen
2008-05-13 22:29 ` Dylan Hall
2008-05-13 23:09 ` richardvoigt
2008-05-13 23:56 ` Dylan Hall
2008-05-14 0:55 ` Brad Dameron
2008-05-14 7:27 ` Francesco Dolcini
2008-05-13 17:28 ` Stephen Hemminger
2008-05-13 19:24 ` [Bridge] RSTP implementation choice Benoit PAPILLAULT
2008-05-14 7:51 ` [Bridge] STP bug, loop not detetcted Francesco Dolcini
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