Re: bridge problem when one interface is in blocking mode

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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.
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