If_bridge and MST

Eygene Ryabinkin rea-fbsd at codelabs.ru
Tue Sep 4 04:03:49 PDT 2007


Good day.

Tue, Sep 04, 2007 at 11:07:22AM +0300, Shteryana Shopova wrote:
> AFAIK, Cisco PVST is the predecessor of 802.1Q MSTP. If I remember
> correctly one of the notable differences between the two is that with
> Cisco PVST BPDUs are send for every spanning tree instance (also
> tagged?) while with 802.1Q MSTP all information is contained in the
> per instance M-records (MSTI Configuration Messages) in a single BPDU,
> and BPDUs are only sent in instance 0.

Yeah, according to http://www.cisco.com/warp/public/473/147.html
this looks correct.  Though I am not sure that BPDUs are sent only
in the IST, but I can be wrong.
-- 
Eygene


More information about the freebsd-net mailing list