How To Check Error Disabled Ports
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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 err-disabled gbic-invalid ----------------------------------------------------------------------- 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 Psecure-violation
-- 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.
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Err-disabled Udld
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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 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 how to 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 how to check 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 mismatch. For more detailed and brief descriptions, please visit http://www.firewa