Allied Telesis AT-S63 - Manual (Page 122)

Chapter 9: Link-flap Protection
122 Section I: Basic Operations
Guidelines
Here are the guidelines to link-flap protection:
 The rate and duration are set at the switch or the stack level and apply
to all of the ports.
 You can enable this feature on a per-port basis.
 The performance of the switch is not affected if you enable it on all of
the ports.
 This feature is supported on the base ports and the SFP and XFP
modules in the switches.
 Ports that have been disabled by the switch because of link-flap
events do not forward traffic again until you enable them with the
standard SET SWITCH PORT command, the AlliedWare Plus NO
SHUTDOWN command, or an equivalent menus or web browser
windows command.