Bridge ID's are different from sc0 MAC addresses, so you'll never see them in CAM table. It's also impossible to use l2trace command for this purpose (but it can be very useful for user PC finding, e.g.).
There is one manual way of root bridge finding:
look at the output and find "Designated Root Port" line
telnet to the switch which is connected via Designated Root Port (if you don't know which switch it is, use sh cdp neighbours)
until you are on the root switch (Designated Root and Bridge ID are the same).
Another way is using some tool, Fluke Networks LAN MapShot, e.g.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...