Reference Guide

Spanning Tree Protocol (STP) | 1471
Example
FTOS#show spann 0
Executing IEEE compatible Spanning Tree Protocol
Bridge Identifier has priority 32768, Address 0001.e800.0a56
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Current root has priority 32768 address 0001.e800.0a56
Topology change flag set, detected flag set
Number of topology changes 1 last change occurred 0:00:05 ago
from GigabitEthernet 1/3
Timers: hold 1, topology change 35
hello 2, max age 20, forward_delay 15
Times: hello 1, topology change 1, notification 0, aging 2
Port 26 (GigabitEthernet 1/1) is Forwarding
Port path cost 4, Port priority 8, Port Identifier 8.26
Designated root has priority 32768, address 0001.e800.0a56
Designated bridge has priority 32768, address 0001.e800.0a56
Designated port id is 8.26, designated path cost 0
Timers: message age 0, forward_delay 0, hold 0
Number of transitions to forwarding state 1
BPDU: sent:18, received 0
The port is not in the portfast mode
Port 27 (GigabitEthernet 1/2) is Forwarding
Port path cost 4, Port priority 8, Port Identifier 8.27
Designated root has priority 32768, address 0001.e800.0a56
Designated bridge has priority 32768, address 0001.e800.0a56
Designated port id is 8.27, designated path cost 0
Timers: message age 0, forward_delay 0, hold 0
Number of transitions to forwarding state 1
BPDU: sent:18, received 0
The port is not in the portfast mode
Port 28 (GigabitEthernet 1/3) is Forwarding
Port path cost 4, Port priority 8, Port Identifier 8.28
Designated root has priority 32768, address 0001.e800.0a56
Designated bridge has priority 32768, address 0001.e800.0a56
Designated port id is 8.28, designated path cost 0
Timers: message age 0, forward_delay 0, hold 0
Number of transitions to forwarding state 1
BPDU: sent:31, received 0
The port is not in the portfast mode
FTOS#
Table 52-1. show spanning-tree 0 Command Information
Field Description
“Bridge Identifier...” Lists the bridge priority and the MAC address for this
STP bridge.
“Configured hello...” Displays the settings for hello time, max age, and
forward delay.
“We are...” States whether this bridge is the root bridge for the
STG.
“Current root...” Lists the bridge priority and MAC address for the root
bridge.
“Topology flag...” States whether the topology flag and the detected flag
were set.