bpdu-kie

this is your brain on bpdu... not sure what it all means but it seems pretty important...

protocol id:   0000 IEEE 802.1d
version id:    00  v
bpdu type:     00 config bpdu, 80 tcn bpdu t
bit field:     1 byte
  1 : topology change flag
  2 : unused    0
  3 : unused    0
  4 : unused    0
  5 : unused    0
  6 : unused    0
  7 : unused    0
  8 : topology change ack
root priority    2 bytes rp
root id:         6 bytes root id
root path cost:  4 bytes
bridge priority: 2 bytes bp
bridge id:       6 bytes
port id:         2 bytes
message age:     2 bytes in 1/256 secs
max age:         2 bytes in 1/256 secs
hello time:      2 bytes in 1/256 secs
forward delay:   2 bytes in 1/256 secs

and here is bpdu output from debug...


06:05:42: STP: VLAN0010 Fa0/19 tx BPDU: config protocol=ieee
    Data : 0000 00 00 00 800A0009B73FCE80 00000000 800A0009B73FCE80 8013 0000 1

              ieee   v    t   f     rp         root id     path cost    bp        bridge id       pid/age/time/delay
                                                                      0=root

sw2950_02#sh spann vlan 10

VLAN0010
  Spanning tree enabled protocol ieee
  Root ID    Priority    32778
             Address     0009.b73f.ce80
             This bridge is the root
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32778  (priority 32768 sys-id-ext 10)
             Address     0009.b73f.ce80
             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time 300

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/17           Desg FWD 19        128.17   P2p
Fa0/18           Desg FWD 19        128.18   P2p
Fa0/19           Desg FWD 19        128.19   P2p

sw2950_02#