Re: bridge problem when one interface is in blocking mode

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On Wed, 29 Aug 2007 14:27:44 -0700 (PDT)
wang dengyi <dy_wang@xxxxxxxxx> wrote:

> --- Stephen Hemminger
> <shemminger@xxxxxxxxxxxxxxxxxxxx> wrote:
> 
> > On Thu, 23 Aug 2007 11:17:44 -0700 (PDT)
> > wang dengyi <dy_wang@xxxxxxxxx> wrote:
> > 
> > > Hi Stephen,
> > > 
> > > Here is the detail
> > > kernel version: 2.6.14
> > > architecture: PPC
> > > ehternet: from the processor mpc5200b
> > > wifi manufactor: Netgate 5004 MP, Atheros chipset
> > > wifi driver: madwifi 0.91
> > > WDS on wifi: enabled.
> > > 
> > > I guess it's an issue combined by ethernet
> > driver/wifi
> > > driver and bridge. Is there anything you suspect
> > that
> > > I can check? 
> > > 
> > > I believe the 2 actions: updating forwarding
> > database
> > > when a stp package is received and delivering the
> > > package based on the forwarding database, are
> > correct.
> > > I must miss something. For example, STP detection
> > set
> > > an interface as blocking and remove it from the
> > > forwarding database? It's just my wild guess. 
> > > 
> > > By the way, I found Bartek reported the same issue
> > on
> > > 2.6.11.12 and 2.6.13.2. Here is the link:
> > >
> >
> https://lists.linux-foundation.org/pipermail/bridge/2005-October/004710.html
> > > He has 3 ethernet nic for each machine and his fix
> > is
> > > to update the forwarding database only when the
> > port
> > > is in learning or forwarding state.
> > >
> > 
> > There was a bug fix in later kernel (2.6.19) that
> > causes the forwarding
> > database to be purged when STP decides not to use
> > interface.
> > 
> 
> Hi Stephen, 
> 
> I merged the bridge code from the kernel source tree
> 2.6.19. But it's the same thing: packages are sent
> through the blocking interface. Anyway, I am worried
> that something is missing when I merged the code.
> Could you give me more information about the patch? If
> it's possible, please send me  your patch for 2.6.19?
> Thank you very much. 
> 
> At the same time, I am looking for the relationship
> between blocking interface and the forwarding table
> from the stp source code. No luck until now. Any hint?
> 
> 

Perhaps you are getting packets in over the blocked device,
and they are getting into the forwarding table?

-- 
Stephen Hemminger <shemminger@xxxxxxxxxxxxxxxxxxxx>
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