show spanning-tree

Displays Spanning Tree Protocol (STP) information.

Syntax

show spanning-tree [ brief | interface { ethernet slot/port | port-channel port_channel_number } | pvst | mst [ brief | detail | instance instance_id | interface ] mst-config | vlan vlan_id ]

Parameters

brief
Display brief spanning tree information.
interface
Display iinformation about the spanning tree configuration on an interface.
ethernet slot/port
Display spanning tree information about a specific Ethernet interface.
port-channel port_channel_number
Display spanning tree information about a port channel interface.
pvst
Display PVST+ information.
mst
Display MSTP information.
detail
Display detailed MSTP tree information.
instance instance_id
Display MSTP information about a specivic instance.
mst-config
Display MSTP region configuration information.
vlan vlan_id
Display spanning tree information about a specific VLAN.

Modes

Privileged EXEC mode.

Usage Guidelines

Note

Note

Extreme Networks supports the PVST+ and R-PVST+ protocols. The PVST and R-PVST protocols are proprietary to Cisco and are not supported.

Examples

To display spanning tree information: 

 
device# show spanning-tree brief

 Spanning-tree Mode: Spanning Tree Protocol

      Root ID      Priority 4096
                   Address 768e.f805.5800
                   Hello Time 8, Max Age 25, Forward Delay 20

      Bridge ID    Priority 4096
                   Address 768e.f805.5800
                   Hello Time 8, Max Age 25, Forward Delay 20

 Interface     Role  Sts  Cost       Prio  Link-type        Edge
 ---------------------------------------------------------------------
 Eth 2/32      DES   FWD  2000       128   P2P               No
 Eth 2/66      DES   FWD  2000       128   P2P               No
 Po 7          DES   FWD  2000       128   P2P               No
 Po 8          DES   FWD  2000       128   P2P               No
 Po 21         DES   LIS  500        128   P2P               No
 Po 141        BKUP  BLK  1000       128   P2P               No
 Po 151        DES   FWD  10000      128   P2P               No
 Po 154        DES   FWD  285        128   P2P               No
 Po 172        BKUP  BLK  1000       128   P2P               No
 Po 173        BKUP  BLK  500        128   P2P               No
9036859-00 Rev AA