Cisco Pm-4-err_disable Link-flap Error Detected
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SwitchingSpanning Tree ProtocolTroubleshoot and AlertsConfiguration Example and TechNotes Errdisable Port State Recovery on the Cisco IOS Platforms Download Print Available Languages Download Options
Errdisable Recovery Cause Link-flap
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Cisco Link-flap Detection
(Kindle) (87.6 KB) View on Kindle device or Kindle app on multiple devices Updated:Mar 23, 2016 Document ID:69980 ContentsIntroductionPrerequisitesRequirementsComponents UsedBackground InformationPlatforms That Use ErrdisableErrdisableFunction of ErrdisableCauses of ErrdisableDetermine If Ports dtp-flap 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 from it, and provides examples of errdisable recovery. This document uses the terms errdisable and error disable pm 4 err_disable bpduguard error detected 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 IOS® 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 lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command. Background
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Pagp-flap
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Cisco Psecure-violation
Aug 17 2008 5:55AM GMT What is the Link-flap error in Cisco Switches? Yasir Irfan Profile: Yasir Irfan Link flap means that the interface continually goes up and down in a Cisco Switch. http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/69980-errdisable-recovery.html The interface is put into the errdisabled state if it flaps more than five times in 10 seconds. The common cause of link flap is a Layer 1 issue such as a bad cable, duplex mismatch, or bad Gigabit Interface Converter (GBIC) card. Look at the console messages or the messages that were sent to the syslog server that state the reason for the port shutdown. 13w0d: %PM-4-ERR_DISABLE: http://itknowledgeexchange.techtarget.com/network-technologies/what-is-the-link-flap-error-in-cisco-switches/ link-flap error detected on Fa0/28, putting Fa0/28 in err-disable state Issue this command in order to view the flap values: SRCL-ONC-3550-AS01# sho errdisable flap-values ErrDisable Reason Flaps Time (sec) ----------- ---- -------
pagp-flap 3 30 dtp-flap 3 30 link-flap 5 10 SRCL-ONC-3550-AS01# The interface can be recovered from errdisable state by reenabling the port using the errdisable recovery cause link-flap. This command is used to configure the recovery mechanism so that the interface can be brought out of the disabled state and allowed to try again. You can also set the time interval. Errdisable recovery is disabled by default in Cisco Switches; when enabled, the default time interval is 300 seconds. Once you enable the errdisable state you can see the following log in the Cisco switch which is trying to recover the error disable interface (link-flap error) 13w0d: %PM-4-ERR_RECOVER: Attempting to recover from link-flap err-disable state on Fa0/28 Comment RSS Feed Email a friend  Comment on this Post There was an error processing your information. Please try again later. Thanks. We'll let you know when a new response is added. Please enter a reply. Send me notifications when other members comment. Register Hereor login if you are already aView Threaded efraim at clues Nov26,2005,2:41AM Post #1 of 4 (10062 views) Permalink GBIC http://www.gossamer-threads.com/lists/cisco/nsp/36406 error message, any clue? (cpd_port_enable: port 25 xcvr_enable_link: FALSE) The GBIC on this 2950 is killing me. Saying shut/ no shut gets it into error-disabled https://aacable.wordpress.com/2012/12/07/cisco-3750-howto-enable-err-disabled-ports/ immediately. I had to say 'speed nonegotiate' to bring this one up. Anyone seen these scary messages before? Regards, Alexander Nov 26 10:43:33: %LINEPROTO-5-UPDOWN: Line protocol error detected on Interface GigabitEthernet0/2, changed state to up Nov 26 10:43:35: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to down Nov 26 10:43:36: %PM-4-ERR_DISABLE: link-flap error detected on Gi0/2, putting Gi0/2 in err-disable statecpd_port_enable: port 25 xcvr_enable_link: FALSE Nov 26 10:43:44: %SYS-5-CONFIG_I: Configured from console by vty0 (213.200.88.76) Nov 26 10:43:46: %PM-4-ERR_DISABLE: cisco pm-4-err_disable link-flap link-flap error detected on Gi0/2, putting Gi0/2 in err-disable state Nov 26 10:47:03: %LINK-5-CHANGED: Interface GigabitEthernet0/2, changed state to administratively downcpd_port_enable: port 25 xcvr_enable_link: FALSE _______________________________________________ cisco-nsp mailing list cisco-nsp [at] puck https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ mksmith at adhost Nov28,2005,7:50AM Post #2 of 4 (9946 views) Permalink RE: GBIC error message, any clue? (cpd_port_enable: port 25 xcvr_enable_link: FALSE) [In reply to] -----Original Message----- From: cisco-nsp-bounces [at] puck [mailto:cisco-nsp-bounces [at] puck] On Behalf Of Alexander Koch Sent: Saturday, November 26, 2005 2:42 AM To: cisco-nsp [at] puck Subject: [c-nsp] GBIC error message,any clue? (cpd_port_enable: port 25 xcvr_enable_link: FALSE) The GBIC on this 2950 is killing me. Saying shut/ no shut gets it into error-disabled immediately. I had to say 'speed nonegotiate' to bring this one up. Anyone seen these scary messages before? Regards, Alexander Nov 26 10:43:33: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to up Nov 26 10:43:35: %LINEPROTO-5-UPDOWN: Line protocol on Interface Giga
Jahanzaib / Pinochio~:) @ 2:09 PM Personnel Reference Guide: Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch and is supported on most Catalyst switches running the Cisco IOS software. The Errdisable error disable feature was designed to inform the administrator when there is a port problem or error. The reasons a catalyst switch can go into Errdisable mode and shutdown a port are many and include: Duplex Mismatch Loopback Error Link Flapping (up/down) Port Security Violation Broadcast Storms When a port is in error-disabled state, it is effectively shut down and no traffic is sent or received on that port. The port LED is set to the orange color and, when you issue the show interfaces command, the port status shows as Errdisabled. To enable err-disabled ports on Cisco 3750 switch series. Follow the below . . . First make telnet connection with the switch telnet 10.0.0.1 (change the ip as required,) Enter Password to continue. To view Disabled Ports: show interfaces status err-disabled e.g: NOC_SWITCH>show int status err-disabled Port Name Status Reason Err-disabled Vlans Gi2/0/10 err-disabled link-flap NOC_SWITCH> To Enable Port: enable config t int G2/0/10 no switchport port-security (< You probably dont need this line, its just to disable pot security feature, I used it to perform various tests) shut no shut exit Change the interface name to match your. In above example I had two 3750-e models in stack mode. so its showing G2, you may get G1 if you have single switch. TIP: Link flap means that the specific port continuously goes up and down. The port is put into the errdisabled state if it flaps more than four-five times in few seconds. The common cause of link flap is a Layer 1 issue such as a bad cable, duplex