KKrtz wrote:
as far as i understood the spanning tree can get flooded if the switch looses the destination mac in the table after an timeout...this can fill up the uplinks to the core...
Spanning Tree does not really care for any MAC forwarding, it has only the responsibility to make sure we have a loop free layer two topology.
The ordinary switch forwarding enginge has control over the MAC to port mappings and might flood frames if the tables get full. This should in normal cases just be for some small fraction of seconds, since once a reply gets in the switch re-learns the MAC-to-port.