• Can be caused by:
  • arp-inspection
    • Detects errors with dynamic ARP inspection.
  • bpduguard
    • Detects when a spanning-tree bridge protocol data unit (BPDU) is received on a port configured for STP PortFast.
  • dhcp-rate-limit
    • Detects an error with DHCP snooping.
  • dtp-flap
    • Detects when trunking encapsulation is changing from one type to another.
  • gbic-invalid
    • Detects the presence of an invalid GBIC or SFP module.
  • inline-power
    • Detects an error with offering PoE inline power.
  • l2ptguard
    • Detects an error with L2 Protocol Tunneling.
  • link-flap
    • Detects when the port link state is flapping between the up and down states.
  • loopback
    • Detects when an interface has been looped back.
  • pagp-flap
    • Detects when an EtherChannel bundle's ports no longer have consistent configurations.
  • pppoe-ia-rate-limit
    • Detects errors with PPPoE Intermediate Agent rate limiting.
  • psecure-violation
    • Detects conditions that trigger port security configured on a port.
  • psp
    • Detects an error related to protocol storm protection.
  • security-violation
    • Detects errors related to 802.1X security.
  • sfp-config-mismatch
    • Detects errors related to SFP config mismatches.
  • small-frame
    • Detects errors when VLAN-tagged packets are too small and arrive above a certain time.
  • storm-control
    • Detects when a storm control threshold has been exceeded on a port.
  • udld
    • Detects when a link is seen to be unidirectional.
  • all
    • Detects every possible cause.

• To configure all causes

  • switch(config)#errdisable detect cause all

• To configure one cause

  • switch(config)#errdisable detect cause <cause name>

  • switch(config)#errdisable detect cause link-flap

• To disable all causes

  • switch(config)#no errdisable detect cause all

• To disable one cause

  • switch(config)#no errdisable detect cause <cause name>

  • switch(config)#no errdisable detect cause link-flap

• Automatically recover from all error conditions

  • switch(config)#errdisable recovery cause all

• Automatically recover from one error condition

  • switch(config)#errdisable recovery cause mac-limit

• Else, to recover from an errdisabled state, the port must be shut/no shut.

  • switch(config-line)#int te 1/0/1
    switch(config-if)#shut
    *Nov 23 06:47:22.720: %LINK-5-CHANGED: Interface TenGigabitEthernet1/0/1, changed state to administratively down
    switch(config-if)#no shut
    *Nov 23 06:47:30.749: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/0/1, changed state to up

• Default recovery interval is 300 secs (5 mins)
• Modify recovery interval by

  • switch(config)#errdisable recovery interval ?
      <30-86400>  timer-interval(sec)

  • switch(config)#errdisable recovery interval 30

CCIE-EI v1.1