Cisco Catalyst 4500 Series Software Configuration Manual page 741

Chapter 23 Configuring STP and MST
This example shows the spanning tree summary when the switch is not in MSTP mode, that is, the switch
is in PVST or Rapid-PVST mode. The output string displays the current STP mode:
Switch# show spanning-tree summary
Switch is in rapid-pvst mode
Root bridge for: VLAN0001, VLAN2001-VLAN2002
EtherChannel misconfig guard is enabled
Extended system ID
Portfast Default
PortFast BPDU Guard Default
Portfast BPDU Filter Default is disabled
Loopguard Default
UplinkFast
BackboneFast
Pathcost method used
PVST Simulation Default
Name
---------------------- -------- --------- -------- ---------- ----------
VLAN0001
VLAN2001
VLAN2002
---------------------- -------- --------- -------- ---------- ----------
3 vlans
This example shows the interface details when PVST+ simulation is globally enabled, or the default
configuration:
Switch# show spanning-tree interface gi3/13 detail
Port 269 (GigabitEthernet3/13) of VLAN0002 is forwarding
This example shows the interface details when PVST+ simulation is globally disabled:
Switch# show spanning-tree interface gi3/13 detail
Port 269 (GigabitEthernet3/13) of VLAN0002 is forwarding
Port path cost 4, Port priority 128, Port Identifier 128.297.
Designated root has priority 32769, address 0013.5f20.01c0
Designated bridge has priority 32769, address 0013.5f20.01c0
Designated port id is 128.297, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
PVST Simulation is disabled by default
BPDU: sent 132, received 1
This example shows the interface details when PVST+ simulation is explicitly enabled on the port:
Switch# show spanning-tree interface gi3/13 detail
Port 269 (GigabitEthernet3/13) of VLAN0002 is forwarding
Port path cost 4, Port priority 128, Port Identifier 128.297.
Designated root has priority 32769, address 0013.5f20.01c0
Designated bridge has priority 32769, address 0013.5f20.01c0
Designated port id is 128.297, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
is enabled
is disabled
is disabled
is disabled
is disabled
is disabled
is short
is enabled but inactive in rapid-pvst mode
Blocking Listening Learning Forwarding STP Active
2
2
2
6
Port path cost 4, Port priority 128, Port Identifier 128.297.
Designated root has priority 32769, address 0013.5f20.01c0
Designated bridge has priority 32769, address 0013.5f20.01c0
Designated port id is 128.297, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
PVST Simulation is enabled by default
BPDU: sent 132, received 1
0 0 0
0 0 0
0 0 0
0 0 0
Configuring PVST+ Simulation
2
2
2
6
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