>That said, let's say you do have 2 switch ports (1&2) connected to a same hub. A
>broadcast occurs, which comes in on ports 1&2, but since a switched port does >not
>turn traffic to the source port, the broadcasts coming in on ports 1&2 will not get
>re-broadcasted back onto themselves...
Marc,
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. 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. 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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