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 DTS:DTS2019012106158
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 无
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