[Bridge] Linux Bridge Forward STP?

[Bridge] Linux Bridge Forward STP?

[Steven Williamson]

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Hi,

If I have 2 switches already using RSTP with only a single link between
them. Then add a redundant link using a Linux bridge with STP turned off.
Will the Linux bridging code forward the RSTP BPDU's so the other switches
realize there is a new path to the root bridge, and hopefully block one of
the ports ?


The exact secnario is an ethernet segment spanning 2 datacenter's via a
fibre link. We'd like to add redundancy using a linux bridge (bridging to a
VPN tap device and routing over the net) but have since discoverd the Linux
code does not support RSTP yet.

p.s

Many thanks to the developers of the Linux briding code!

Regards
Steven Williamson.

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Re: [Bridge] Linux Bridge Forward STP?

[Stephen Hemminger]

On Sun, 10 May 2009 14:37:56 +0100
Steven Williamson <steven43126@gmail.com> wrote:

> Hi,
> 
> If I have 2 switches already using RSTP with only a single link between
> them. Then add a redundant link using a Linux bridge with STP turned off.
> Will the Linux bridging code forward the RSTP BPDU's so the other switches
> realize there is a new path to the root bridge, and hopefully block one of
> the ports ?
> 
> 
> The exact secnario is an ethernet segment spanning 2 datacenter's via a
> fibre link. We'd like to add redundancy using a linux bridge (bridging to a
> VPN tap device and routing over the net) but have since discoverd the Linux
> code does not support RSTP yet.
> 
> p.s
> 
> Many thanks to the developers of the Linux briding code!
> 
> Regards
> Steven Williamson.

Turn on STP in Linux bridge in your case. Otherwise Linux bridge will
eat the RSTP BPDU's

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