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New Member

What are reasons err-disabled would occur on interface

We have a Cisco 3750G-POE 24 port switch. A user's port status went into err-disabled status. The switch is not configured for port-security. What are some reasons why a port would go err-disabled?

Thx in advance for any help provided.

1 ACCEPTED SOLUTION

Accepted Solutions

What are reasons err-disabled would occur on interface

  • Duplex mismatch


  • Port channel misconfiguration


  • BPDU guard violation


  • UniDirectional Link Detection (UDLD) condition


  • Late-collision detection


  • Link-flap detection


  • Security violation


  • Port Aggregation Protocol (PAgP) flap


  • Layer 2 Tunneling Protocol (L2TP) guard


  • DHCP snooping rate-limit


  • Incorrect GBIC / Small Form-Factor Pluggable (SFP) module or cable


  • Address Resolution Protocol (ARP) inspection


  • Inline power



  • See link:



  • http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml#topic3




4 REPLIES

What are reasons err-disabled would occur on interface

  • Duplex mismatch


  • Port channel misconfiguration


  • BPDU guard violation


  • UniDirectional Link Detection (UDLD) condition


  • Late-collision detection


  • Link-flap detection


  • Security violation


  • Port Aggregation Protocol (PAgP) flap


  • Layer 2 Tunneling Protocol (L2TP) guard


  • DHCP snooping rate-limit


  • Incorrect GBIC / Small Form-Factor Pluggable (SFP) module or cable


  • Address Resolution Protocol (ARP) inspection


  • Inline power



  • See link:



  • http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml#topic3




New Member

What are reasons err-disabled would occur on interface

Thx for your quick response. Have a good day.

Purple

What are reasons err-disabled would occur on interface

Usually it will tell you in the log why it was err-disabled.

Cisco Employee

What are reasons err-disabled would occur on interface

Thanks Ton, for replying quickly and helping Mark in time.

Regards,

Pulkit

Techincal Community Manager

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