Cisco WS-C2950SX-48-SI Configuration Manual page 120

Using PVST+
This example shows how to set the PVST+ 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 how to set the PVST+ 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
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
7-24
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 not-connected
1 not-connected
1 not-connected
1 not-connected
PVST+
ieee
00-60-70-4c-70-00
16384
19
2/3
14 sec Hello Time 2
00-d0-00-4c-18-00
32769 (bridge priority: 32768, sys ID ext: 1)
Hello Time 2
Vlan Port-State
1 not-connected
1 not-connected
1 not-connected
1 not-connected
sec Forward Delay 10 sec
sec Forward Delay 15 sec
Cost Prio Portfast Channel_id
4 32 disabled 0
4 32 disabled 0
100 32 disabled 0
100 32 disabled 0
sec Forward Delay 10 sec
sec Forward Delay 15 sec
Cost Prio Portfast Channel_id
4 32 disabled 0
4 32 disabled 0
100 32 disabled 0
100 32 disabled 0
—
Release 8.1
Chapter 7 Configuring Spanning Tree
78-15486-01