, , , STP BPDU 2- . STP BPDU, .
STP
, STP :
;
;
STP .
STP . , STP . 30 50 . , .
STP
, . STP .
. - STP, 50 . , .
STP . , . STP . .
STP .
show spanning-tree ,
show spanning-tree summary
show spanning-tree detail
show spanning-tree interface STP
show spanning-tree blockedports
1. Packet Tracer.
2. :
3 2960-24;
3 ( );
( ) copper cross-over;
S2 ( ) copper straight-through.
3. show * STP , ; , . show spanning-tree .
4. , . .