[c-nsp] 802.1ah documentation

[Vitkovsky, Adam]

Hi,
I somehow failed to find some decent documentation on how does the Provider Backbone bridges work
Can you please point me to some documentation or books please?
I'm mostly interested in how is the mac routing accomplished

Also I'd be interested to see how may of you are actually using it in production in favor of VPLS or in access-layer of H-VPLS
Thank you

adam