User guide

334 Brocade 6910 Ethernet Access Switch Configuration Guide
53-1002581-01
Spanning Tree Commands
18
spanning-tree
This command enables the Spanning Tree Algorithm globally for the switch. Use the no form to
disable it.
Syntax
[no] spanning-tree
Default Setting
Spanning tree is enabled.
Command Mode
Global Configuration
Command Usage
The Spanning Tree Algorithm (STA) can be used to detect and disable network loops, and to provide
backup links between switches, bridges or routers. This allows the switch to interact with other
bridging devices (that is, an STA-compliant switch, bridge or router) in your network to ensure that
only one route exists between any two stations on the network, and provide backup links which
automatically take over when a primary link goes down.
spanning-tree
loopback-detection
release-mode
Configures loopback release mode for a port IC
spanning-tree
loopback-detection trap
Enables BPDU loopback SNMP trap notification for a port IC
spanning-tree mst cost Configures the path cost of an instance in the MST IC
spanning-tree mst port-priority Configures the priority of an instance in the MST IC
spanning-tree
port-bpdu-flooding
Floods BPDUs to other ports when global spanning tree is disabled IC
spanning-tree port-priority Configures the spanning tree priority of an interface IC
spanning-tree root-guard Prevents a designated port from passing superior BPDUs IC
spanning-tree
spanning-disabled
Disables spanning tree for an interface IC
spanning-tree
loopback-detection release
Manually releases a port placed in discarding state by
loopback-detection
PE
spanning-tree
protocol-migration
Re-checks the appropriate BPDU format PE
show spanning-tree Shows spanning tree configuration for the common spanning tree (i.e.,
overall bridge), a selected interface, or an instance within the multiple
spanning tree
PE
show spanning-tree mst
configuration
Shows the multiple spanning tree configuration PE
TABLE 76 Spanning Tree Commands (Continued)
Command Function Mode