Pm-4-err_disable Loopback Error Detected On Gi0 2
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SwitchingSpanning Tree ProtocolTroubleshoot and AlertsConfiguration Example and TechNotes Errdisable Port State Recovery on the Cisco IOS Platforms pm-4-err_disable link-flap error detected Download Print Available Languages Download Options PDF (143.8 KB) View with err disabled reason loopback Adobe Reader on a variety of devices ePub (82.1 KB) View in various apps on iPhone,
Pm-4-err_disable Bpduguard Error Detected
iPad, Android, Sony Reader, or Windows Phone Mobi (Kindle) (87.6 KB) View on Kindle device or Kindle app on multiple devices Updated:Mar 23, 2016 Document ID:69980 ContentsIntroductionPrerequisitesRequirementsComponents
%ethcntr-3-loop_back_detected: Loop-back Detected
UsedBackground InformationPlatforms That Use ErrdisableErrdisableFunction of ErrdisableCauses of ErrdisableDetermine If Ports Are in the Errdisabled StateDetermine the Reason for the Errdisabled State (Console Messages, Syslog, and the show errdisable recovery Command)Recover a Port from Errdisabled StateCorrect the Root ProblemReenable the Errdisabled PortsVerifyTroubleshootRelated Information Introduction This document defines the errdisabled state, describes how to recover pm-4-err_disable channel-misconfig (stp) error detected from it, and provides examples of errdisable recovery. This document uses the terms errdisable and error disable interchangeably. Customers often contact Cisco Technical Support when they notice that one or more of their switch ports have become error disabled, which means that the ports have a status of errdisabled. These customers want to know why the error disablement happened and how they can restore the ports to normal. Note: The port status of err-disabled displays in the output of the show interfaces interface_number status command. Prerequisites Requirements There are no specific requirements for this document. Components Used In order to create the examples in this document, you need two Cisco Catalyst 4500/6500 Series Switches (or the equivalent) in a lab environment with cleared configurations. The switches should run Cisco IOSĀ® Software and each switch should have two Fast Ethernet ports that are capable of EtherChannel and PortFast. The information in this document was created from the devices in a specific la
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Ethcntr-3-half_dux_collision_exceed_threshold
Carry a VLAN's trafficCisco 887VA-M-K9 can't ping local LAN or the disable keepalives other way around Forums → Equipment Support → Hardware By Brand → Cisco → [HELP] Figuring out cscea46385 the reason behind err-disabled loopback. uniqs1620 Share « VLAN question • A little update on daily fun » techsup1983join:2013-03-23 techsup1983 Member 2015-Jun-20 4:47 am [HELP] Figuring out the reason http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/69980-errdisable-recovery.html behind err-disabled loopback.Hello all.We have a core switch (WS-C3650-48PD) and there are ports which keep showingPort Name Status Reason Err-disabled VlanGi2/0/19 err-disabled loopbackis it a good idea to do the no keepalives command on the ports or would there be a way to get more information.What would be the best way to troubleshoot this?Please ask me for anything http://www.dslreports.com/forum/r30125337-HELP-Figuring-out-the-reason-behind-err-disabled-loopback i've not mentioned. Thanks. · actions · 2015-Jun-20 4:47 am · tired_runnerPremium Memberjoin:2000-08-25New York tired_runner Premium Member 2015-Jun-20 9:49 am Please draw up a quick and dirty MS Paint diagram of your topology, particularly where your 3650 connects to other switches. · actions · 2015-Jun-20 9:49 am · markysharkeyPremium Memberjoin:2012-12-20united kingd markysharkey to techsup1983 Premium Member 2015-Jun-21 11:52 am to techsup1983err-disable loopback could be because storm control is enabled on the port and it keeps seeing BPDU's and/or traffic from a loop.As well as the diagram Network Guy has asked for lets have see the output for the following:show run int gi 2/0/19 sho int gig 2/0/19 sho int trunk shp spanning-tree vlan x (where x is the native VLAN) The only time I see a port with the spanning-tree port-state listed as loopback is where every switch in a topology has had spanning tree disabled except for one. I used to demo this in a lab environment when I taught CCNA and was showing switching loops and how to de
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