From: Shahid Ansari (shahid1357@gmail.com)
Date: Wed Aug 27 2008 - 20:37:51 ART
Does any one use BPDUfilter in any live Environment ?Why it is essential to
use ?
Theoretically we know how it works but practically why to enable BPDUfilter
?
Thanks
Shahid
On Thu, Aug 28, 2008 at 3:59 AM, Ibrahim kabir <kebramccie@live.com> wrote:
> The BPDU filtering feature can be globally enabled on the switch or can be
> enabled per interface, but
> the feature operates with some differences.
>
> At the global level, you can enable BPDU filtering on Port Fast-enabled
> interfaces by using the
> spanning-tree portfast bpdufilter default global configuration command.
> This
> command prevents
> interfaces that are in a Port Fast-operational state from sending or
> receiving
> BPDUs. The interfaces still
> send a few BPDUs at link-up before the switch begins to filter outbound
> BPDUs.
> You should globally
> enable BPDU filtering on a switch so that hosts connected to these
> interfaces
> do not receive BPDUs. If
> a BPDU is received on a Port Fast-enabled interface, the interface loses
> its
> Port Fast-operational status,
> and BPDU filtering is disabled.
>
> At the interface level, you can enable BPDU filtering on any interface by
> using the spanning-tree
> bpdufilter enable interface configuration command without also enabling the
> Port Fast feature. This
> command prevents the interface from sending or receiving BPDUs.
>
> Caution Enabling BPDU filtering on an interface is the same as disabling
> spanning tree on it and can result in
> spanning-tree loops.
> You can enable the BPDU filtering feature for the entire switch or for an
> interface
> got that directly for the 3560CG
>
> HTH
>
> kabir
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