12. STP –Change The Root Bridge In The Network.
Switch#config t
Enter configuration commands, one
per line. End with CNTL/Z.
Switch(config)#spanning-tree mode
pvst
Switch(config)#spanning-tree
vlan1 priority 2323
Switch>show
spanning-tree
VLAN0001
Spanning tree
enabled protocol ieee
Root ID Priority
24577
Address
00E0.8F9B.6675
This bridge is the
root
Hello Time 2 sec
Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority
24577 (priority 24576 sys-id-ext 1)
Address
00E0.8F9B.6675
Hello Time 2 sec
Max Age 20 sec Forward Delay 15 sec
Aging Time 20
Interface Role Sts
Cost Prio.Nbr Type
----------------
---- --- --------- -------- --------------------------------
Fa0/1 Desg FWD 19
128.1 P2p
Fa0/2 Desg FWD 19
128.2 P2p
Fa0/3 Desg FWD 19
128.3 P2p
Fa0/4 Desg FWD 19
128.4 P2p
Fa0/5 Desg FWD 19
128.5 P2p
Switch>show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 24577
Address 00E0.8F9B.6675
Cost 19
Port 1(FastEthernet0/1)
Hello Time 2 sec Max Age 20 sec
Forward Delay 15 sec
Bridge ID Priority 32769 (priority
32768 sys-id-ext 1)
Address 0030.A3C4.0714
Hello Time 2 sec Max Age 20 sec
Forward Delay 15 sec
Aging Time 20
Interface Role Sts Cost Prio.Nbr
Type
---------------- ---- --- ---------
-------- --------------------------------
Fa0/3AltnBLK 19 128.3 P2p
Fa0/2 Desg FWD 19 128.2 P2p
Fa0/1 RootFWD 19 128.1 P2p
Fa0/4
AltnBLK 19 128.4 P2p
