How To Check Error Disabled Ports In Cisco Switch
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Default None Command Modes EXEC mode Command err-disabled loopback History Release Modification 4.2(1)N1(1) This command was introduced. Examples This err-disabled link-flap example shows how to display the error disabled state of interfaces:switch# show interface status err-disabled
Cisco Psecure-violation
----------------------------------------------------------------------- Port Name Status Reason ----------------------------------------------------------------------- Eth114/1/27 -- down BPDUGuard errDisable Eth114/1/28 -- down BPDUGuard errDisable Eth114/1/29 -- down BPDUGuard errDisable Eth114/1/30 -- down BPDUGuard errDisable Eth114/1/31 -- down BPDUGuard errDisable Eth114/1/32
Err-disabled Gbic-invalid
-- down BPDUGuard errDisable Eth114/1/33 -- down BPDUGuard errDisable Eth114/1/34 -- down BPDUGuard errDisable Eth114/1/35 -- down BPDUGuard errDisable Eth114/1/36 -- down BPDUGuard errDisable Eth114/1/39 -- down BPDUGuard errDisable Eth114/1/40 -- down BPDUGuard errDisable Eth114/1/41 -- down BPDUGuard errDisable Eth114/1/42 -- down BPDUGuard errDisable Eth114/1/43 -- down BPDUGuard errDisable Eth114/1/44 -- down BPDUGuard errDisable Eth114/1/45 -- down BPDUGuard errDisable Eth114/1/46 -- down BPDUGuard errDisable Eth114/1/47 -- down BPDUGuard errDisable --More-- switch# Related Commands Command Description errdisable detect cause Enables the error disabled (err-disabled) detection. errdisable recovery cause Enables error disabled recovery on an interface.
SwitchingEthernetTroubleshoot and AlertsConfiguration Example and TechNotes Recovering From errDisable Port State on the CatOS Platforms Download Print err-disabled udld Available Languages Download Options PDF (30.9 KB) View with Adobe
Line Protocol Is Down (err-disabled)
Reader on a variety of devices Updated:Jun 20, 2007 Document ID:12017 Contents Introduction Prerequisites Requirements Components Used errdisable detect cause Conventions errDisable Platforms Using errDisable Function of errDisable Causes of errDisable Recovery from errDisable Extensions to errDisable How To Recover a Port From errDisable State Fixing http://www.cisco.com/web/techdoc/dc/reference/cli/nxos/commands/l2/show_interface_status_err-disabled.html an Error-Disabled Port - Examples Error-Disabled Because of BPDU Port-Guard Error-Disabled Because of EtherChannel Misconfiguration Verify the Configuration Troubleshoot the Configuration Command Summary Related Information Introduction Customers often contact Cisco Technical Support when they notice one or more of their switch ports have become error-disabled; that is, the ports have a status of errDisable. http://www.cisco.com/c/en/us/support/docs/lan-switching/ethernet/12017-20.html They want to know why this happened and how the ports can be restored to normal. This document describes what the errDisable state is, how to recover from it, and provides two examples of recovering from errDisable. Throughout this document, the terms errDisable and error-disable are used interchangeably. (errDisable is the status of a port as shown by the show port command, error-disable or error-disabled are the English language equivalents of errDisable.) Prerequisites Requirements There are no specific requirements for this document. Components Used The information in this document is based on these software and hardware versions. You need these in order to create the examples in this document: Two Catalyst 4000/5000/6000 family switches (or their equivalent) in a lab environment with cleared configurations. Our primary machine was a Catalyst 5500 running CatOS 5.4(2). This was connected to a Catalyst 6509 running 5.3(5a)CSX, but could be any CatOS machine and capable of EtherChannel and portfast. Two RJ-45 Ethernet crossover
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 https://aacable.wordpress.com/2012/12/07/cisco-3750-howto-enable-err-disabled-ports/ disable feature was designed to inform the administrator when there is a port problem http://ciscofaq.blogspot.com/2004/11/how-do-i-view-and-clear-err-disabled.html 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 how to 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 how to check 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, please visit http://www.firewall.cx/cisco-technical-knowledgebase/cisco-switches/883-cisco-switches-errdisable-autorecovery.html Regard's Syed Jahanzaib 24.851000 67.008300 Like this:Like Loading... Related Comments (4) 4 Comments » Hello, You don't need to remove the port-security on the port. just shut the port and no shut it. enable config t int G2/0/10 shut no shut exit Comment by Germain -- December 7, 2012 @ 4:13 PM Reply Yes you really don't need to disable port security, its good, but in my test lab I had to disable it to perform various tests. thanks for sharing. Comment by Syed Jahanzaib / Pinoch
to the software download pages or tech support incident areas.) Thursday, November 04, 2004 Q: How do I view and clear err-disabled switchports on a 3550? A: On the 3550, the command #sho int status will print a table of interfaces, with status. The status may be "err-disabled". To investigate such ports, use #sho int status err. To clear the port status, issue a (c-i)#shut and then a (c-i)#no shut on the interface. Or, you can enable autorecovery after a time period. Use these commands to check your current autorecovery config: #sho errdis detect #sho errdis flap-val #sho errdis recovery To enable autorecovery for a particular cause, use (c)#errdis recov cause {cause} [permalink] Links to this post: See links to this post <$BlogBacklinkTitle$> <$BlogBacklinkSnippet$> posted by <$BlogBacklinkAuthor$> @ <$BlogBacklinkDateTime$> Create a Link << Home Previous Posts Why are only my eBGP-learned routes getting redist... Where do I go to download IOS versions? How do I determine what version of IOS is needed t... How do these posts look?