errdisable | more...

errdisable is not fun, but a reality... shut, no shut will recover mostly but if there is still a problem, errdisable may persist...  errdisable points to a problem that needs to be solved...


sw3550_01(config)#errdisable recovery cause ?
  all                   Enable timer to recover from all error causes
  arp-inspection        Enable timer to recover from arp inspection error disable state
  bpduguard             Enable timer to recover from BPDU Guard error
  channel-misconfig     Enable timer to recover from channel misconfig error
  dhcp-rate-limit       Enable timer to recover from dhcp-rate-limit error
  dtp-flap              Enable timer to recover from dtp-flap error
  gbic-invalid          Enable timer to recover from invalid GBIC error
  l2ptguard             Enable timer to recover from l2protocol-tunnel error
  link-flap             Enable timer to recover from link-flap error
  link-monitor-failure  Enable timer to recover from link monitoring failure
  loopback              Enable timer to recover from loopback error
  mac-limit             Enable timer to recover from mac limit disable state
  oam-remote-failure    Enable timer to recover from OAM detected remote failure
  pagp-flap             Enable timer to recover from pagp-flap error
  port-mode-failure     Enable timer to recover from port mode change failure
  psecure-violation     Enable timer to recover from psecure violation error
  security-violation    Enable timer to recover from 802.1x violation error
  sfp-config-mismatch   Enable timer to recover from SFP config mismatch error
  storm-control         Enable timer to recover from storm-control error
  udld                  Enable timer to recover from udld error
  unicast-flood         Enable timer to recover from unicast flood error
  vmps                  Enable timer to recover from vmps shutdown error

those are the choices to set up recovery from... you can pick and choose individually those recovery conditions that you think will apply to your network or you can choose all... 

without errdisable recovery cause all... note after hostname...

sw3550_01#sh run
Building configuration...

Current configuration : 5732 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname sw3550_01
!
!
no aaa new-model
ip subnet-zero
ip routing
ip domain-list 4.2.2.2
ip dhcp relay information option
!
ip dhcp pool ozlan
   default-router 172.16.50.50
!
!

with errdisable recovery cause all

sw3550_01(config)#errdisable recovery cause all
sw3550_01(config)#end
sw3550_01#sh run
Building configuration...

Current configuration : 6561 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname sw3550_01
!
!
no aaa new-model
errdisable recovery cause udld
errdisable recovery cause bpduguard
errdisable recovery cause security-violation
errdisable recovery cause channel-misconfig
errdisable recovery cause pagp-flap
errdisable recovery cause dtp-flap
errdisable recovery cause link-flap
errdisable recovery cause sfp-config-mismatch
errdisable recovery cause gbic-invalid
errdisable recovery cause l2ptguard
errdisable recovery cause psecure-violation
errdisable recovery cause port-mode-failure
errdisable recovery cause dhcp-rate-limit
errdisable recovery cause mac-limit
errdisable recovery cause unicast-flood
errdisable recovery cause vmps
errdisable recovery cause storm-control
errdisable recovery cause arp-inspection
errdisable recovery cause link-monitor-failure
errdisable recovery cause oam-remote-failure
errdisable recovery cause loopback
ip subnet-zero
ip routing
ip domain-list 4.2.2.2
ip dhcp relay information option
!
ip dhcp pool ozlan
   default-router 172.16.50.50
!
!

the default time limit for recovery is 300 seconds... that can be adjusted down to as low as 30 seconds... 300 seconds is a long time...