bpdu-filter question

GS,

I recently watched a recorded bootcamp that stated that bpdu filter will
revert back to the default spanning tree behavior if it sees a bpdu. They
also say should be enabled on port fast ports to avoid loops. I seem to
have found conflicting documentation on cisco.com one page states that the
bpdu's are blocked constantly and the other pretty much agrees with the
vendor. I tried this on a 3550 running 12.2(40) see2 and bpdu's were
blocked no matter what. Did this change across code releases/platforms or
are they just wrong?

Heads:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_44_se/configuration/guide/swstpopt.html#wp1033638

tails:
http://www.cisco.com/en/US/docs/switches/lan/catalyst4000/7.4/configuration/guide/stp_enha.html

Blogs and organic groups at http://www.ccie.net
Received on Wed Nov 04 2009 - 22:23:26 ART