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C4503 交换机 GLBP残留配置导致CPU过高问题(原创)

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发表于 2019-5-7 16:43:10 | 显示全部楼层 |阅读模式
本帖最后由 Dandy 于 2019-5-7 16:45 编辑

1、2018年11月14日,接到IMC监控报障,发现一台Cisco catalyst 4603E  CPU 很高(70%-82%)
show logging
Nov 14 07:16:47.281: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:17:17.277: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:17:47.278: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:18:17.281: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:18:47.301: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:19:17.298: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:19:47.320: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:20:17.320: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:20:47.340: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:21:17.341: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:21:47.365: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:22:17.366: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:22:47.390: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:23:17.390: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:23:47.411: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:24:17.406: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:24:47.414: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:25:17.416: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:25:47.438: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:26:17.440: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:26:47.463: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:27:17.465: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:27:47.487: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:28:17.488: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:28:47.510: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:29:17.512: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:29:36.956: %SYS-5-CONFIG_I: Configured from console by A06986 on vty0 (10.26.33.129)
Nov 14 07:29:47.531: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:30:17.530: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:30:32.595: %SYS-5-CONFIG_I: Configured from console by A06986 on vty0 (10.26.33.129)
Nov 14 07:30:47.555: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:31:17.556: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:31:47.572: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:32:17.573: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
Nov 14 07:32:47.593: %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface
2.show run interface vlan 3000
interface Vlan3000
ip address 10.0.28.101 255.255.255.252
no glbp 4 load-balancing
3. show glbp/show glbp brief 发现有异常的GLBP进程

分析:当时觉得VLAN 3000中 group 4 的IP、priority、preempt 都不在了,只剩下一个glbp 4 load-balancing host-dependent
查看状态也是disable,所以以为GLBP group 4 配置已经全部删除了,实际上并不是。
还有一个残留配置 no glbp 4 load-balancing 也能触发 %GLBP-4-BADVIP: Vlan3000 Grp 4 address 10.0.28.120 is in the wrong subnet for this interface,导致CPU 负载很高。
最终我把glbp 4 load-balancing,还原成默认配置,CPU降至正常4% 故障排除.IMC告警也消失了

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