On Thu, 18 Aug 2011 16:06:19 +0100
Nick Carter [off-list ref] wrote:

Why can't we use the 802.1D specified STP group address to identify ?
The existing code uses that address.
I know you said on another thread that there are people using other addresses.
Who are these people ?
Are they following any standard ?
What address / address range are they using ?

The group address can be reprogrammed, and it is settable on other
routing equipment. People do it to create spanning tree domains.