Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 406)

356 Brocade 6910 Ethernet Access Switch Configuration Guide
53-1002581-01
Spanning Tree Commands
18
Command Usage
If at any time the switch detects STP BPDUs, including Configuration or Topology Change
Notification BPDUs, it will automatically set the selected interface to forced STP-compatible mode.
However, you can also use the spanning-tree protocol-migration command at any time to manually
re-check the appropriate BPDU format to send on the selected interfaces (i.e., RSTP or
STP-compatible).
Example
Console#spanning-tree protocol-migration eth 1/5
Console#
show spanning-tree
This command shows the configuration for the common spanning tree (CST), for all instances
within the multiple spanning tree (MST), or for a specific instance within the multiple spanning tree
(MST).
Syntax
show spanning-tree [interface | mst instance-id | brief | stp-enabled-only]
interface
ethernet unit/port
unit - Unit identifier. (Range: 1)
port - Port number. (Range: 1-12)
port-channel channel-id (Range: 1-12)
instance-id - Instance identifier of the multiple spanning tree.
(Range: 0-4094)
brief - Shows a summary of global and interface settings.
stp-enabled-only - Displays global settings, and settings for interfaces for which STP is
enabled.
Default Setting
None
Command Mode
Privileged Exec
Command Usage
• Use the show spanning-tree command with no parameters to display the spanning tree
configuration for the switch for the Common Spanning Tree (CST) and for every interface in the
tree.
• Use the show spanning-tree interface command to display the spanning tree configuration for
an interface within the Common Spanning Tree (CST).
• Use the show spanning-tree mst command to display the spanning tree configuration for all
instances within the Multiple Spanning Tree (MST), including global settings and settings for
active interfaces.