Cisco Nexus 5000 Series Command Reference Release 4.0(1a)N2(1) (OL-16599-01, March 2009)

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Cisco Nexus 5000 Series Command Reference
OL-16599-01
Chapter 3 Ethernet Show Commands
show spanning-tree
Table 3-1 describes the fields that are displayed in the output of show spanning-tree commands.
Note Display output differs slightly depending on whether you are running Rapid PVST+ or MST.
Related Commands
Table 3-1 show spanning-tree Command Output Fields
Field Definition
Role Current port STP role. Valid values are as follows:
• Desg (designated)
• Root
• Altn (alternate)
• Back (backup)
Sts Current port STP state. Valid values are as follows:
• BLK (blocking)
• DIS (disabled)
• LRN (learning)
• FWD (forwarding)
Type Status information. Valid values are as follows:
• P2p/Shr—The interface is considered as a point-to-point (shared) interface by the
spanning tree.
• Edge—The port is configured as an STP edge port (either globally using the
default command or directly on the interface) and no BPDU has been received.
• Network—The port is configured as an STP network port (either globally using
the default command or directly on the interface).
• *ROOT_Inc, *LOOP_Inc, *PVID_Inc, *BA_Inc, and *TYPE_Inc—The port is
in a broken state (BKN*) for an inconsistency. The broken states are Root
inconsistent, Loopguard inconsistent, PVID inconsistent, Bridge Assurance
inconsistent, or Type inconsistent.
Command Description
show spanning-tree
active
Displays information about STP active interfaces only.
show spanning-tree
bridge
Displays bridge ID, timers, and protocol for the local bridge on the switch.
show spanning-tree
brief
Displays brief summary information about STP.
show spanning-tree
detail
Displays detailed information about STP.
show spanning-tree
interface
Displays STP interface status and configuration of specified interfaces.