cisco3750 端口假死处理办法

cisco3750 端口假死

cisco-3750-1#show log
May 14 00:44:00: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/8, changed

state to down
May 14 00:44:00: %PM-4-ERR_DISABLE: link-flap error detected on Gi1/0/8, putting Gi1/0/8 in

err-disable state
May 14 00:44:01: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/8, changed state to down

cisco-3750-1#show int Gi1/0/8
GigabitEthernet1/0/8 is down, line protocol is down (err-disabled)

查看触发err-disable的原因：
cisco-3750-1>show interfaces status err-disabled

Port      Name               Status       Reason
Gi1/0/8   TO_IPTV_M6000      err-disabled link-flap

cisco-3750-1#sh int Gi1/0/8 status

Port      Name               Status       Vlan       Duplex  Speed Type
Gi1/0/8   TO_IPTV_M6000      err-disabled routed       auto   auto 1000BaseLX SFP

cisco-3750-1#sh errdisable recovery
ErrDisable Reason    Timer Status
-----------------    --------------
udld                 Disabled
bpduguard            Disabled
security-violatio    Disabled
channel-misconfig    Disabled
vmps                 Disabled
pagp-flap            Disabled
dtp-flap             Disabled
link-flap            Disabled
l2ptguard            Disabled
psecure-violation    Disabled
sfp-config-mismat    Disabled
gbic-invalid         Disabled
dhcp-rate-limit      Disabled
unicast-flood        Disabled
storm-control        Disabled
inline-power         Disabled
arp-inspection       Disabled
loopback             Disabled

Timer interval: 300 seconds

Interfaces that will be enabled at the next timeout:

恢复命令：
cisco-3750-1(config)#errdisable recovery cause Link-flap

cisco-3750-1#sh errdisable recovery            
ErrDisable Reason    Timer Status
-----------------    --------------
udld                 Disabled
bpduguard            Disabled
security-violatio    Disabled
channel-misconfig    Disabled
vmps                 Disabled
pagp-flap            Disabled
dtp-flap             Disabled
link-flap            Enabled
l2ptguard            Disabled
psecure-violation    Disabled
sfp-config-mismat    Disabled
gbic-invalid         Disabled
dhcp-rate-limit      Disabled
unicast-flood        Disabled
storm-control        Disabled
inline-power         Disabled
arp-inspection       Disabled
loopback             Disabled

Timer interval: 300 seconds

Interfaces that will be enabled at the next timeout:

Interface    Errdisable reason    Time left(sec)
---------    -----------------    --------------
Gi1/0/8      link-flap                 258 

300秒后恢复：
cisco-3750-1#sh int Gi1/0/8 status 

Port      Name               Status       Vlan       Duplex  Speed Type
Gi1/0/8   TO_IPTV_M6000      connected    routed       full   1000 1000BaseLX SFP
cisco-3750-1#sh int Gi1/0/8      
GigabitEthernet1/0/8 is up, line protocol is up (connected)

 

cisco-3750-1(config)#no errdisable recovery cause Link-flap