link flap

{{Short description|A communications link alternating between up and down states}}

Link flap is a condition where a communications link alternates between up and down states.{{cite web |url=https://itknowledgeexchange.techtarget.com/network-technologies/what-is-the-link-flap-error-in-cisco-switches/ |title=What is the Link-flap error in Cisco Switches? |access-date=2012-12-02 |archive-date=2012-10-18 |archive-url=https://web.archive.org/web/20121018005044/http://itknowledgeexchange.techtarget.com/network-technologies/what-is-the-link-flap-error-in-cisco-switches/ |url-status=dead }} Link flap can be caused by end station reboots, power-saving features, incorrect duplex configuration or marginal connections, and signal integrity issues on the link.{{cite web |title=How to Troubleshoot I/O Port Flapping |url=https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-Troubleshoot-I-O-Port-Flapping |url-status=dead |archive-url=https://web.archive.org/web/20181110054614/https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-Troubleshoot-I-O-Port-Flapping |archive-date=2018-11-10 |access-date=2012-12-02}}