From: Jim Newton (jnewton@internetnoc.com)
Date: Thu Nov 07 2002 - 17:05:02 GMT-3
In addition:
BPDU guard will shut down any port with portfast enabled if it receives any
bpdu's.
From the documentation:
At the interface level, you can enable BPDU guard on any port by using the
spanning-tree bpduguard
enable interface configuration command without also enabling the Port Fast
feature. When the port
receives a BPDU, it is put in the error-disabled state.
Receiving a BPDU on a Port Fast-enabled port signals an invalid
configuration, such as the connection
of an unauthorized device, and the BPDU guard feature puts the port in the
error-disabled state.
BPDU filter will disable portfast if it receives any bpdu's, but it doesn't
shut down the port.
From the documentation:
At the interface level, you can enable BPDU filtering on any port without
also enabling the Port Fast
feature by using the spanning-tree bpdufilter enable interface configuration
command. This command
prevents the port from sending or receiving BPDUs.
If a BPDU is received on a Port Fast-enabled port, the port loses its Port
Fast-operational status, and BPDU filtering
is disabled.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Senthil Kumar
Sent: Thursday, November 07, 2002 12:11 PM
To: Sam.MicroGate@usa.telekom.de; ccielab@groupstudy.com
Subject: RE: Spanning tree question
use guard to blocking incoming bpdu's. use filter to not send any bpdu out
that interface.
root guard is same as bpdu guard except it blocks a port only if a bpdu is
superior (lowpri.smallmac)
-----Original Message-----
From: Sam.MicroGate@usa.telekom.de [mailto:Sam.MicroGate@usa.telekom.de]
Sent: 07 November 2002 18:02
To: ccielab@groupstudy.com
Subject: Spanning tree question
Hello group
What is the difference between bpdugaured and bpdufilter? I am a little
confused. Thanks.
Sam
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