From: Francesco Dolcini <fdolcini@sysnetsistemi.it>
To: Joakim Tjernlund <joakim.tjernlund@transmode.se>,
bridge@lists.linux-foundation.org
Subject: Re: [Bridge] STP bug, loop not detetcted
Date: Thu, 08 May 2008 14:13:16 +0200 [thread overview]
Message-ID: <4822EE5C.8030404@sysnetsistemi.it> (raw)
In-Reply-To: <1210240896.32216.146.camel@gentoo-jocke.transmode.se>
Joakim Tjernlund wrote:
> On Thu, 2008-05-08 at 11:04 +0200, Francesco Dolcini wrote:
>> 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).
>
> Are these proprietary unidirectional link detection protocols the only
> way to solve the problem?
spanning tree protocol, in the various IEEE incarnation (802.1D, 802.1Q)
and cisco (PVSTP) does not handle this problem, so an external mechanism
is needed.
> Would STP break if the interface was set to "non forwarding" in this
> case until the bridge stops seeing its own STP messages?
At least this will not solve the more general problem of a
unidirectional link (rx working and tx broken).
next prev parent reply other threads:[~2008-05-08 12:13 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
2008-05-08 10:01 ` Joakim Tjernlund
2008-05-08 12:13 ` Francesco Dolcini [this message]
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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