Hi! I've got a problem with a 3Com switch.
When I connect it to another switch in my LAN, STP blocks the port I've connected and my switch starts receiving about 100 multicasts per second. If I connect the same port to another switch out of my LAN the port keeps in Forwarding state. Without STP everything works right.
I'm using RSTP with all the default values and I have no idea about why this happens.
All opinions are welcome.