Spanning-Tree Loopback-Detection Release-Mode - Supermicro SSE-G2252 User Manual

SSE-G2252/SSE-G2252P Switches User's Manual

spanning-tree loopback-detection release-mode

This command configures the release mode for a port that was placed in the discarding
state because a loopback BPDU was received. Use the no form to restore the default.
Syntax
spanning-tree loopback-detection release-mode
{auto | manual}
no spanning-tree loopback-detection release-mode
auto - Allows a port to automatically be released from the discarding state when the
loopback state ends.
manual - The port can only be released from the discarding state manually.
Default Setting
auto
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• If the port is configured for automatic loopback release, then the port will only be
returned to the forwarding state if one of the following conditions is satisfied:
• The port receives any other BPDU except for it's own, or;
• The port's link status changes to link down and then link up again, or;
• The port ceases to receive it's own BPDUs in a forward delay interval.
• 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
Example
SSE-G2252(config)#interface ethernet 1/5
SSE-G2252(config-if)#spanning-tree loopback-detection release-mode manual
command.
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