From: Dillon Yang (gzdillon@hotmail.com)
Date: Fri Mar 25 2005 - 22:54:01 GMT-3
Hi, group:
I'm confused by the two command "spanning-tree bpdufilter " and "spanning-tree bpduguard enable ".
<quote> If a BPDU is received on a PortFast-enabled port, the port loses its PortFast-operational status, and BPDU filtering is disabled. </quote>
So I think the former do nothing with filtering and the latter truly filter the BPDU by making the port "error-disable".
<quote> Caution Enabling BPDU filtering on an interface is the same as disabling spanning tree on it and can result in spanning-tree loops. </quote>
I can not understand how "BPDU filtering " is the same as "disabling spanning tree "?
TIA
dillon
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