Service Manual

summary (OPTIONAL) Enter the keyword summary to only the number of ports in the spanning
tree group and their state.
Command Modes EXEC Privilege
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.10(0.0) Introduced on the S6100–ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
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.
8.4.2.1 Added support for the optional guard keyword on the C-Series, S-Series, and E-Series.
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 Identier...” Lists the bridge priority and the MAC address for this STP bridge.
“Congured 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
• notication
1568 Spanning Tree Protocol (STP)