Cisco交换机接口出现err-disabled

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IOS

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1Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(55)SE5, RELEASE SOFTWARE (fc1)

故障现象：
故障接口插不插网线指示灯都为 桔红色，查看接口状态为

view source
1#sh interfaces status
2Port      Name               Status       Vlan       Duplex  Speed Type
3Gi1/0/48                     err-disabled 1            auto   auto 10/100/1000BaseTX

原因查找：

view source
01查看err-disable原因
02#show interface status err-disable
03 
04Port      Name               Status       Reason               Err-disabled Vlans
05Gi1/0/48                     err-disabled loopback
06 
07loopback，看来是环路了
08 
09#看看具体配置
10 
11#查看针对哪些功能开启了err检测
12#sh errdisable detect
13ErrDisable Reason            Detection    Mode
14-----------------            ---------    ----
15arp-inspection               Enabled      port
16bpduguard                    Enabled      port
17channel-misconfig (STP)      Enabled      port
18community-limit              Enabled      port
19dhcp-rate-limit              Enabled      port
20dtp-flap                     Enabled      port
21gbic-invalid                 Enabled      port
22inline-power                 Enabled      port
23invalid-policy               Enabled      port
24l2ptguard                    Enabled      port
25link-flap                    Enabled      port
26loopback                     Enabled      port
27lsgroup                      Enabled      port
28mac-limit                    Enabled      port
29pagp-flap                    Enabled      port
30port-mode-failure            Enabled      port
31pppoe-ia-rate-limit          Enabled      port
32psecure-violation            Enabled      port/vlan
33security-violation           Enabled      port
34sfp-config-mismatch          Enabled      port
35small-frame                  Enabled      port
36storm-control                Enabled      port
37udld                         Enabled      port
38vmps                         Enabled      port
39 
40#检测到err后是否重启接口，重启接口的间隔时间是多少
41#sh errdisable recovery
42ErrDisable Reason            Timer Status
43-----------------            --------------
44arp-inspection               Disabled
45bpduguard                    Disabled
46channel-misconfig (STP)      Disabled
47dhcp-rate-limit              Disabled
48dtp-flap                     Disabled
49gbic-invalid                 Disabled
50inline-power                 Disabled
51l2ptguard                    Disabled
52link-flap                    Disabled
53mac-limit                    Disabled
54loopback                     Disabled
55pagp-flap                    Disabled
56port-mode-failure            Disabled
57pppoe-ia-rate-limit          Disabled
58psecure-violation            Disabled
59security-violation           Disabled
60sfp-config-mismatch          Disabled
61small-frame                  Disabled
62storm-control                Disabled
63udld                         Disabled
64vmps                         Disabled
65 
66Timer interval: 300 seconds
67 
68Interfaces that will be enabled at the next timeout:

恢复接口：

view source
1#关闭再打开接口就行了
2#interface Gi1/0/48
3#shutdown
4#no shutdown

 

 

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