topology changes with zeroes

[agugger]

Hi everybody,

Is anybody out there who knows the meaning of a MAC address with all zero, after a topology change occured?

We had this in an environment with Catalyst 6509 and 4006.

last topology change occured: Thu Nov 7 2002, 09:20:07

topology change last recvd. from 00-00-00-00-00-00

Thanks in advance.

Andy and Roland

[moorj]

The zero'd mac means this switch is the topology initiator.

[agugger]

Thanks for your reply

here's an output

spanningtree type ieee

spanningtree multicast address 01-80-c2-00-00-00

bridge priority 16384

bridge mac address 00-d0-03-75-dd-2a

bridge hello time 2 sec

bridge forward delay 15(15) sec

topology change initiator: 7/13

last topology change occured: Fri Nov 1 2002, 13:12:49

topology change FALSE

topology change time 35

topology change detected FALSE

topology change count 65

topology change last recvd. from 00-00-00-00-00-00

the initiator port 7/13 is an uplink to another switch.