交换机端口“假死” 如何起死回生?(2)

Switch(config)#errdisable recovery cause ?
all Enable timer to recover from all causes
bpduguard Enable timer to recover from BPDU Guard error disable state
channel-misconfig Enable timer to recover from channel misconfig disable state
dhcp-rate-limit Enable timer to recover from dhcp-rate-limit error disable state
dtp-flapEnable timer to recover from dtp-flap error disable state
gbic-invalidEnable timer to recover from invalid GBIC error disable state
l2ptguard Enable timer to recover from l2protocol-tunnel error disable state
link-flap Enable timer to recover from link-flap error disable state
loopbackEnable timer to recover from loopback detected disable state
pagp-flap Enable timer to recover from pagp-flap error disable state
psecure-violation Enable timer to recover from psecure violation disable state
security-violationEnable timer to recover from 802.1x violation disable state
udldEnable timer to recover from udld error disable state
unicast-flood Enable timer to recover from unicast flood disable state
vmpsEnable timer to recover from vmps shutdown error disable state

Switch(config)#errdisable recovery cause loopback

Switch# show errdisable recovery
ErrDisable ReasonTimer Status
-------------------------------
udld Disabled
bpduguardDisabled
security-violatioDisabled
channel-misconfigDisabled
vmps Disabled
pagp-flapDisabled
dtp-flap Disabled
link-flapDisabled
gbic-invalid Disabled
l2ptguardDisabled
psecure-violationDisabled
gbic-invalid Disabled
dhcp-rate-limitDisabled
unicast-floodDisabled
loopback Enabled
Timer interval: 300 seconds
Interfaces that will be enabled at the next timeout:
InterfaceErrdisable reasonTime left(sec)
----------------------------------------
Fa0/8loopback276
Fa0/17 loopback267
Fa0/20 loopback250