Bill, thanks for the insight. See comments below..
>
>What you have stated above is not entirely true. Yes a switch does >not
>place traffic back on a port it just received it from, but the >traffic on
>port 1 WILL be placed on port 2 and vice-versa.
Yes. I see your point and I agree. What we have here is a broadcast storm.
>Also, with having 2 connections to a hub, the switch will send BPDU's
> >down port 1 and port 2, BPDU's from port 1 will be returned to the
> >switch on port 2 and BPDU's from 2 returned on port 1. Once the >switch
>sees it's own BPDU's it will kick off STP and if you have >default settings
>on the switch, port 2 will be blocked.
I think the only thing that will put a port into blocking mode is when it
detects a loop with another bridge/switch. I have default settings and the
switch does not block a port, so what you stated-did not happen. But it will
block one when another switch is connected the same way. But, not with a
hub. I think if a switch sees it's own BPDUs it drops or ignores them.
>Your statement about a Hub not sending BPDU's is correct. It is the
> >switch's BPDU's that you need to watch out for.
>
>William Swedberg CCNP CCDP
>SBC DataComm
>(860) 547-3997
>
>
>
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