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【原创】一次办公网故障trobleshooting经历分享

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发表于 2020-10-28 12:43:50 | 显示全部楼层 |阅读模式
故障描述:
无线PC无法访问互联网,跟踪路径只显示第一跳,无法ping通网关

网络拓扑结构:

排查过程:
1、接入交换机上排查mac地址表项是否正常、LLDP、上联核心端口、port-channel状态、log
2、核心交换机上排查网关SVI状态、LLDP、端口、port-channel状态、log、堆叠状态

故障原因:
通过检查核心交换机LOG发现堆叠端口收不到hello报文
2020-10-25 12:35:56.440:Topology changedfrom 1 to 0 (0: link, 1: ring).
2020-10-25 12:35:56.440:Stack port 1 does not receive any hello packet for 25second(s).
2020-10-25 12:35:46.580:Stack-port 2 did not receive a hello packet.
2020-10-25 12:35:46.580:Stack-port 1 did not receive a hello packet.
2020-10-25 12:35:46.440:Stack port 2 does not receive any hello packet for 15second(s).
2020-10-25 12:35:46.440:Stack port 1 does not receive any hello packet for 15second(s).
2020-10-25 12:35:41.440:Stack port 2 does not receive any hello packet for 10second(s).
2020-10-25 12:35:41.440:Stack port 1 does not receive any hello packet for 10second(s).
2020-10-25 12:35:56.540:Slot 0 changed tostandalone at state "RUNNING".
2020-10-25 12:35:56.540:A routing table is built. Topo is 0(1: ring, 0: link)state is idle, and strategy is 0xcd (0xcc:shortest path, 0xcd: link).
2020-10-25 12:35:56.540:
2020-10-25 12:35:56.540:The link status on stack-port 2 neighbor(slot 1) is1(0: down, 1: up).
2020-10-25 12:35:56.540:Set the status of stack port 2 to 2 (1: forwarding, 2:block-all, 3+: block-some). The result is 0(0: ok).
2020-10-25 12:35:56.470:A routing table is built. Topo is 0(1: ring, 0: link)state is idle, and strategy is 0xcd (0xcc:shortest path, 0xcd: link).
2020-10-25 12:35:56.470:The device in slot 1 was removed.
2020-10-25 12:35:56.470:Slot 1 is not present. The reason is removed alone.
2020-10-25 12:35:56.470:Stack port 2 does not receive any hello packet for 25second(s).
2020-10-25 12:35:56.450:The link status on stack-port 1 neighbor(slot 1) is1(0: down, 1: up).
2020-10-25 12:35:56.450:Set the status of stack port 1 to 2 (1: forwarding, 2:block-all, 3+: block-some). The result is 0(0: ok).
2020-10-25 12:35:56.440:A routing table is built. Topo is 0(1: ring, 0: link)state is idle, and strategy is 0xcc (0xcc:shortest path, 0xcd: link).
2020-10-25 12:35:56.440:Topology changed from 1 to 0 (0: link, 1: ring).
2020-10-25 12:35:56.440:Stack port 1 does not receive any hello packet for 25second(s).
2020-10-25 12:35:46.580:Stack-port 2 did not receive a hello packet.
2020-10-25 12:35:46.580:Stack-port 1 did not receive a hello packet.
2020-10-25 12:35:46.440:Stack port 2 does not receive any hello packet for 15second(s).
2020-10-25 12:35:46.440:Stack port 1 does not receive any hello packet for 15second(s).
2020-10-25 12:35:41.440:Stack port 2 does not receive any hello packet for 10second(s).
2020-10-25 12:35:41.440:Stack port 1 does not receive any hello packet for 10second(s).
2020-4-9 12:28:14.590:Set the status of stack port 1 to 4 (1: forwarding, 2:block-all, 3+: block-some). The result is 0(0: ok).
2020-4-9 12:28:14.590:A routing table is built. Topo is 1(1: ring, 0: link)state is clear break, and strategy is 0xcc (0xcc:shortest path, 0xcd: link).


厂商给出答复:
2.6.6 解决设备长时间运行概率性出现协议震荡或者堆叠分裂的问题
问题单号 DTSDTS2019012106158
问题现象 协议震荡或者堆叠分裂。
重现条件 该问题在设备长时间运行小概率性发生。
问题影响 业务转发异常。
严重级别 严重
根因分析 收包处理流程存在逻辑错误。
解决方案 修复收包处理流程存在逻辑的错误。
修改影响
解决问题的版本V200R010C00SPC600
涉及的产品型号 本问题在S5720-EI款型上均存在,本补丁可以修复上述所有型号上存在的该问题。
特别注意事项 该问题激活补丁后需要重启才能生效。


总结:
友商产品堆叠技术不够成熟,建议大家实际场景中尽量避免使用堆叠

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平均得分5 (2 评价)
发表于 2020-10-29 11:17:13 | 显示全部楼层
这是huawei的设备,思科也有堆叠的bug,也会有脑裂
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平均得分3 (1 评价)
发表于 2020-11-5 12:18:09 来自手机 | 显示全部楼层
HW在堆叠上一直都在耍流氓,偷换概念的
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发表于 2020-11-10 11:33:38 | 显示全部楼层
值得学习。
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发表于 2020-11-14 15:05:04 | 显示全部楼层
他山之石,來學習
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发表于 2020-11-20 13:49:42 | 显示全部楼层
做堆叠肯定要做多主检测的,不然脑裂是一件很烦的事情。
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