mac table...

one of my mini-projects over the next year is to read through the pdf for 3560/3750 that is available on the doc cd, here...

you can download the whole thing... that is almost 1500 pages of yummy goodness and it covers the waterfront...  it's called a configuration guide but it is packed with everything switch... and it will be available during the ccie lab exam... hello... anybody out there? you gotta love yourself some doc cd, baby...

those damn 17 addresses...

IEEE 802.1D specifies 17 multicast addresses, ranging from 0x00180C2000000 to 0x0180C2000010, to be used by different bridge protocols. These addresses are static addresses that cannot be removed.

Regardless of the spanning-tree state, each switch in the stack receives but does not forward packets destined for addresses between 0x0180C2000000 and 0x0180C200000F.

If spanning tree is enabled, the CPU on the switch or on each switch in the stack receives packets destined for 0x0180C2000000 and 0x0180C2000010. If spanning tree is disabled, the switch or each switch in the stack forwards those packets as unknown multicast addresses.

you can count em if you want to...

dlsw1#sh mac add | inc CPU                                                     
 All    0100.0ccc.cccc    STATIC      CPU                                      
 All    0100.0ccc.cccd    STATIC      CPU                                      
 All    0180.c200.0000    STATIC      CPU                                      
 All    0180.c200.0001    STATIC      CPU                                      
 All    0180.c200.0002    STATIC      CPU                                      
 All    0180.c200.0003    STATIC      CPU                                      
 All    0180.c200.0004    STATIC      CPU                                      
 All    0180.c200.0005    STATIC      CPU                                      
 All    0180.c200.0006    STATIC      CPU                                      
 All    0180.c200.0007    STATIC      CPU                                      
 All    0180.c200.0008    STATIC      CPU                                      
 All    0180.c200.0009    STATIC      CPU                                      
 All    0180.c200.000a    STATIC      CPU                                      
 All    0180.c200.000b    STATIC      CPU                                      
 All    0180.c200.000c    STATIC      CPU                                      
 All    0180.c200.000d    STATIC      CPU                                      
 All    0180.c200.000e    STATIC      CPU                                      
 All    0180.c200.000f    STATIC      CPU                                      
 All    0180.c200.0010    STATIC      CPU                                      
 All    ffff.ffff.ffff    STATIC      CPU