Users Guide
Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the S6000-ON.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.5.1.0 Added support for 4-port 40G line cards on the E-Series ExaScale.
8.4.2.1 Added support for the optional guard keyword on the C-Series, S-Series, and E-
Series TeraScale.
8.3.7.0 Introduced on the S4810.
7.7.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
6.2.1.1 Introduced on the E-Series.
Usage Information Enable spanning tree group 0 prior to using this command.
The following describes the show spanning-tree 0 command shown in the example.
Field Description
“Bridge Identier...” Lists the bridge priority and the MAC address for this STP bridge.
“Congured 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 ag...” States whether the topology ag and the detected ag 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, and forward delay.
“Times” List the number of seconds since the last:
• hello time
• topology change
• notication
• 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 identier for the interface.
“Designated root...” Displays the priority and MAC address of the root bridge of the STG that the
interface belongs.
Spanning Tree Protocol (STP)
1487