Cisco WS-C4003 - Catalyst 4000 Chassis Switch Software Configuration Manual page 111

Chapter 7 Configuring Spanning Tree
To configure the spanning tree bridge priority for a VLAN, perform this task in privileged mode:
Task
Step 1
Set the bridge ID priority for a VLAN.
Step 2
Verify the bridge ID priority.
This example shows the bridge ID when MAC address reduction is not enabled (default):
Console> (enable) set spantree priority 30000 1
Spantree 1 bridge priority set to 30000.
Console> (enable) show spantree 1
VLAN 1
Spanning tree mode
Spanning tree type
Spanning tree enabled
Designated Root
Designated Root Priority
Designated Root Cost
Designated Root Port
Root Max Age
Bridge ID MAC ADDR
Bridge ID Priority
Bridge Max Age 20 sec
Port
------------------------ ---- ------------- --------- ---- -------- ----------
1/1
1/2
2/1
2/2
This example shows the bridge ID priority when MAC reduction is enabled:
Console> (enable) set spantree priority 32768 1
Spantree 1 bridge ID priority set to 32769
(bridge priority: 32768 + sys ID extension: 1)
Console> (enable) show spantree 1/1 1
VLAN 1
Spanning tree mode
Spanning tree type
Spanning tree enabled
Designated Root
Designated Root Priority
Designated Root Cost
Designated Root Port
Root Max Age
Bridge ID MAC ADDR
Bridge ID Priority
Bridge Max Age 20 sec
Port
------------------------ ---- ------------- --------- ---- -------- ----------
1/1
1/2
2/1
2/2
78-12647-02
PVST+
ieee
00-60-70-4c-70-00
16384
19
2/3
14 sec Hello Time 2
00-d0-00-4c-18-00
30000
Hello Time 2
Vlan Port-State
1
1
1
1
PVST+
ieee
00-60-70-4c-70-00
16384
19
2/3
14 sec Hello Time 2
00-d0-00-4c-18-00
32769
Hello Time 2
Vlan Port-State
1
1
1
1
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
Command
set spantree priority bridge_ID_priority [vlan]
show spantree [vlan] [active]
sec Forward Delay 10 sec
sec Forward Delay 15 sec
Cost
not-connected 4
not-connected 4
not-connected 100
not-connected 100
sec Forward Delay 10 sec
(bridge priority: 32768, sys ID ext: 1)
sec Forward Delay 15 sec
Cost
not-connected 4
not-connected 4
not-connected 100
not-connected 100
Prio Portfast Channel_id
32 disabled 0
32 disabled 0
32 disabled 0
32 disabled 0
Prio Portfast Channel_id
32 disabled 0
32 disabled 0
32 disabled 0
32 disabled 0
Using PVST+
7-15