Supermicro SSE-G2252, User Manual

Page: 1026 / 1401

Chapter 34: Spanning Tree Commands
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•
If Port Loopback Detection is not enabled and a port receives it’s own
BPDU, then the port will drop the loopback BPDU according to IEEE
Standard 802.1W-2001 9.3.4 (Note 1).
•
Port Loopback Detection will not be active if Spanning Tree is disabled
on the switch.
•
When configured for manual release mode, then a link down / up event
will not release the port from the discarding state. It can only be
released using the spanning-tree loopback-detection release command.
E
XAMPLE
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree loopback-detection release-mode manual
Console(config-if)#
spanning-tree
loopback-detection
trap
This command enables SNMP trap notification for Spanning Tree loopback
BPDU detections. Use the no form to restore the default.
S
YNTAX
[ no ] spanning-tree loopback-detection trap
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (Ethernet, Port Channel)
E
XAMPLE
Console(config)#interface ethernet 1/5
Console(config-if)#spanning-tree loopback-detection trap
spanning-tree
mst cost
This command configures the path cost on a spanning instance in the
Multiple Spanning Tree. Use the no form to restore the default auto-
configuration mode.
S
YNTAX
spanning-tree mst instance-id cost cost
no spanning-tree mst
instance-id cost
instance-id - Instance identifier of the spanning tree.
(Range: 0-4094)
cost - Path cost for an interface. (Range: 0 for auto-configuration,
1-65535 for short path cost method
2
, 1-200,000,000 for long path
cost method)
2. Use the
spanning-tree pathcost method
command to set the path cost method.