Reference Guide

918 | Spanning Tree Protocol (STP)
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Figure 44-4. show spanning-tree brief Command Example
FTOS#show span 0 brief
Executing IEEE compatible Spanning Tree Protocol
Root ID Priority 32768
Address 0001.e800.0a56
Root Bridge hello time 2, max age 20, forward delay 15
Bridge ID Priority 32768,
Address 0001.e800.0a56
Configured hello time 2, max age 20, forward delay 15
Interface Designated
Name PortID Prio Cost Sts Cost Bridge ID PortID
-------------- ------ ---- ---- --- ----- ----------------- ------
Gi 1/1 8.26 8 4 FWD 0 32768 0001.e800.0a56 8.26
Gi 1/2 8.27 8 4 FWD 0 32768 0001.e800.0a56 8.27
Gi 1/3 8.28 8 4 FWD 0 32768 0001.e800.0a56 8.28
FTOS#
Usage
Information
You must enable Spanning Tree group 0 prior to using this command.
Table 44-1. show spanning-tree Command Example 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.
“Number of...” Displays the number of topology changes, the time of the last topology change,
and on what interface the topology change occurred.
“Timers” Lists the values for the following bridge timers:
• hold time
• topology change
• hello time
• max age
• forward delay
“Times” List the number of seconds since the last:
• hello time
• topology change
• notification
• aging
“Port 1...” Displays the Interface type slot/port information and the status of the interface
(Disabled or Enabled).
“Port path...” Displays the path cost, priority, and identifier for the interface.
“Designated root...” Displays the priority and MAC address of the root bridge of the STG that the
interface belongs.
“Designated port...” Displays the designated port ID