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Software Configuration Guide—Release 15.0(2)SG
OL-23818-01
Chapter 18 Configuring STP and MST
Configuring STP
Switch(config-if)# spanning-tree port-priority 100
Switch(config-if)# end
Switch#
This example shows how to verify the configuration of a Fast Ethernet interface when it is configured
as an access port:
Switch# show spanning-tree interface fastethernet 3/1
Vlan Role Sts Cost Prio.Nbr Status
---------------- ---- --- --------- -------- --------------------------------
VLAN0001 Desg FWD 19 128.129 P2p
VLAN1002 Desg FWD 19 128.129 P2p
VLAN1003 Desg FWD 19 128.129 P2p
VLAN1004 Desg FWD 19 128.129 P2p
VLAN1005 Desg FWD 19 128.129 P2p
Switch#
This example shows how to display the details of the interface configuration when the interface is
configured as an access port:
Switch# show spanning-tree interface fastethernet 3/1 detail
Port 129 (FastEthernet3/1) of VLAN0001 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.129.
Designated root has priority 32768, address 0003.6b10.e800
Designated bridge has priority 32768, address 0003.6b10.e800
Designated port id is 128.129, 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
BPDU:sent 187, received 1
Port 129 (FastEthernet3/1) of VLAN1002 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.129.
Designated root has priority 32768, address 0003.6b10.ebe9
Designated bridge has priority 32768, address 0003.6b10.ebe9
Designated port id is 128.129, 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
BPDU:sent 94, received 2
Port 129 (FastEthernet3/1) of VLAN1003 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.129.
Designated root has priority 32768, address 0003.6b10.ebea
Designated bridge has priority 32768, address 0003.6b10.ebea
Designated port id is 128.129, 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
BPDU:sent 94, received 2
Port 129 (FastEthernet3/1) of VLAN1004 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.129.
Designated root has priority 32768, address 0003.6b10.ebeb
Designated bridge has priority 32768, address 0003.6b10.ebeb
Designated port id is 128.129, 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
BPDU:sent 95, received 2
Port 129 (FastEthernet3/1) of VLAN1005 is forwarding
Port path cost 19, Port priority 128, Port Identifier 128.129.