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Catalyst 2960 Port Error Disabled

SwitchingSpanning Tree ProtocolTroubleshoot and AlertsConfiguration Example and TechNotes Errdisable Port State Recovery on the Cisco IOS Platforms Download Print Available Languages Download Options PDF (143.8 KB) View with Adobe Reader on a err-disabled bpduguard variety of devices ePub (82.1 KB) View in various apps on iPhone, iPad,

Err-disabled Link-flap

Android, Sony Reader, or Windows Phone Mobi (Kindle) (87.6 KB) View on Kindle device or Kindle app on multiple devices Updated:Mar err-disabled loopback 23, 2016 Document ID:69980 ContentsIntroductionPrerequisitesRequirementsComponents 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 err-disabled gbic-invalid 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 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

Err-disabled Reason

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 Information Platforms That Use Errdisable The errdisable feature is supported on these Catalyst switches: Catalyst switches that run Cisco IOS Software: 2900XL / 3500XL 2940 / 2950 / 2960 / 2970 3550 / 3560 / 3560-E / 3750 / 3750-E 4000 / 4500 6000 / 6500 Catalyst switches that run Catalyst OS (CatOS) software: 2948G 4


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Errdisable Recovery Cause Psecure-violation

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Jahanzaib / Pinochio~:) @ 2:09 PM Personnel Reference Guide: Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch https://aacable.wordpress.com/2012/12/07/cisco-3750-howto-enable-err-disabled-ports/ 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 https://www.youtube.com/watch?v=559abswkSkc 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 Catalyst 2960 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 Catalyst 2960 Port the below . . . First make telnet connection with the switch telnet (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 mismatch. For more detailed and brief descriptions

out whyClose Port Security - Auto Err-disable Recovery Configuration - Cisco CCNP R&S Level by NB Network Bulls SubscribeSubscribedUnsubscribe3,6883K Loading... Loading... Working... Add to Want to watch this again later? Sign in to add this video to a playlist. Sign in Share More Report Need to report the video? Sign in to report inappropriate content. Sign in Transcript Statistics 2,908 views 10 Like this video? Sign in to make your opinion count. Sign in 11 0 Don't like this video? Sign in to make your opinion count. Sign in 1 Loading... Loading... Transcript The interactive transcript could not be loaded. Loading... Loading... Rating is available when the video has been rented. This feature is not available right now. Please try again later. Published on Nov 25, 2013Port Security - Auto Err-disable Recovery Configuration - Cisco CCNP R&S Level by NB. Step by Step configuration guide using command line. Category Education License Standard YouTube License Show more Show less Loading... Autoplay When autoplay is enabled, a suggested video will automatically play next. Up next Err-disable feature configuring switches 300-115 (v-4) - Duration: 22:53. Aditya Gaur 5,417 views 22:53 Port-Security Configuration - Duration: 15:21. astorinonetworks 25,219 views 15:21 RE: Cisco Certifications are not worth it! - Duration: 13:35. Jorge Almazan 18,061 views 13:35 Basic Switch Port Configuration - Duration: 28:15. Chris Albertsen 943 views 28:15 33 videos Play all Cisco CCNP R&S Certification practical Videos(Route, Switch, Tshoot)Network Bulls Multicast Part 1 - Intro - Duration: 6:54. StormWind Studios 120,624 views 6:54 DHCP Snooping - Configuration commands practical - CCNP R&S by Network Bulls - Duration: 9:46. Network Bulls 3,652 views 9:46 Troubleshoot Err-disable Recovery - Duration: 14:48. Ahmad Ali 315 views 14:48 BPDUGuard & Error-Disable Recovery - Duration: 8:16. CiscoSkills US 68 views 8:16 Cisco CCNA Security Training - Enable SSH in the Cisco IOS - Duration: 10:03. Pluralsight IT - Training Archive 22,963 views 10:03 MST concept, configuration & verification 300-115 (v-14) - Duration: 28:36. Aditya Gaur 3,774