Cisco 交换机端口故障分析（一）

Cisco 交换机端口故障分析（一）

Cisco 交换机端口故障分析（一）   两台Catalyst 6000 之间互联的GE２／１出现了errdisable故障，what's up告警，链路中断。　  　　　　  　　查看log记录：　  　　Sep 4 19:18:50 UTC: %PM-SP-4-ERR_DISABLE: link-flap error detected on Gi2/1, putting Gi2/1 in err-disable state  　　Sep 4 19:19:09 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from FULL to DOWN, Neighbor Down: Dead timer expired  　　Sep 5 00:03:34 UTC: %SYS-5-CONFIG_I: Configured from console by gcc&et on vty0  　　Sep 5 00:07:10 UTC: %SYS-5-CONFIG_I: Configured from console by gcc&et on vty0  　　Sep 5 00:08:13 UTC: %PM-SP-4-ERR_RECOVER: Attempting to recover from link-flap err-disable state on Gi2/1  　　Sep 5 00:08:58 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from LOADING to FULL, Loading Done  　　Sep 5 05:14:07 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from LOADING to FULL, Loading Done  　　Sep 5 06:06:17 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from FULL to DOWN, Neighbor Down: Dead timer expired  　　Sep 5 06:06:47 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from LOADING to FULL, Loading Done  　　Sep 5 06:14:34 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from FULL to DOWN, Neighbor Down: Dead timer expired  　　Sep 5 06:14:37 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from LOADING to FULL, Loading Done  　　Sep 5 06:26:58 UTC: %OSPF-5-ADJCHG: Process 108, Nbr **** on Vlan12 from LOADING to FULL, Loading Done　  　　　  　　注：　由于为真实的网络环境，为了不必要的安全隐患，以＊＊＊＊代替IP地址，请各位见谅！　  　　 　　故障处理：  　　 　　进入configure终端模式，具体如下：　  　　SW1>en  　　Password:  　　SW1#conf t  　　Enter configuration commands, one per line. End with CNTL/Z.  　　SW1(config)#err?  　　errdisable  　　 　　SW1#errdi  　　SW1#errdisable ?  　　detect Error disable detection  　　recovery Error disable recovery  　　 　　SW1(config)#errdisable re  　　SW1(config)#errdisable recovery ?  　　cause Enable error disable recovery for application  　　interval Error disable recovery timer value  　　 　　SW1(config)#errdisable recovery cau  　　SW1(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  　　dtp-flap Enable timer to recover from dtp-flap 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  　　pagp-flap Enable timer to recover from pagp-flap error disable state  　　psecure-violation Enable timer to recover from psecure violation disable state  　　udld Enable timer to recover from udld error disable state  　　 　　SW1(config)#errdisable recovery cause all ?  　　  　　 　　SW1(config)#errdisable recovery cause all 　  　　 　　执行此命令后　　不久端口就显示connected状态　What's up 告警消失。  　　 　　 　　 　　Log Buffer (4096 bytes): 　　: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:04:47.533 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:05:30.128 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:06:50.126 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from INIT to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:07:40.137 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:17:49.948 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:18:33.135 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:18:46.175 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:19:29.134 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:21:13.507 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:21:56.106 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:30:22.296 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:31:05.091 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:31:56.185 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:32:31.120 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from 2WAY to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:33:14.083 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:34:09.958 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:34:52.113 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:37:54.624 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:38:07.063 BJT: %PM-4-ERR_DISABLE: link-flap error detected on Gi1/1, putting Gi1/1 in err-disable state 　　Jul 2 13:38:35.347 BJT: %PM-4-ERR_RECOVER: Attempting to recover from link-flap err-disable state on Gi1/1 　　Jul 2 13:39:18.085 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:39:55.432 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:40:13.488 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from 2WAY to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:40:56.075 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　Jul 2 13:44:03.098 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from FULL to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:44:42.121 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from 2WAY to DOWN, Neighbor Down: Interface down or detached 　　Jul 2 13:45:06.340 BJT: %PM-4-ERR_DISABLE: link-flap error detected on Gi1/1, putting Gi1/1 in err-disable state 　　Jul 2 13:45:32.083 BJT: %PM-4-ERR_RECOVER: Attempting to recover from link-flap err-disable state on Gi1/1 　　Jul 2 13:46:26.066 BJT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.253.2 on GigabitEthernet1/1 from LOADING to FULL, Loading Done 　　 　　 　　// 　　 no file verify auto 　　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 gbic-invalid 　　errdisable recovery cause l2ptguard 　　errdisable recovery cause psecure-violation 　　errdisable recovery cause dhcp-rate-limit 　　errdisable recovery cause unicast-flood 　　errdisable recovery cause vmps 　　errdisable recovery cause storm-control 　　errdisable recovery cause arp-inspection 　　errdisable recovery interval 30 　　spanning-tree mode pvst 　　spanning-tree extend system-id 　　power redundancy-mode redundant 　　!  　　! 　　! 　********************************** 防止err-disable,使用以下命令：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 psecure-violation errdisable recovery cause vmps errdisable recovery cause gbic-invalid errdisable recovery cause loopback errdisable recovery interval 30 #网络管理

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