%C4K_EBM-4-HOSTFLAPPING:Host 1A:01:00:00:00:00 in vlan 1 is flapping between port Gi3/4 and port Gi3/2
交换机之前没做过任何配置，使用也很正常，但是不知道为什么现在就出现这种错误，请帮忙解答。
我是新手，麻烦高手给出解决步骤，谢谢了！！！！
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先打电话给客服寻求支持！
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先打电话给客服寻求支持！
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Problem
The switch generates %SYS-3-P2_ERROR: Host xx:xx:xx:xx:xx:xx is flapping between ports… messages, where xx:xx:xx:xx:xx:xx is a MAC address.
Description
This example shows the console output that you see when this error occurs:
%SYS-4-P2_WARN: 1/Host 00:50:0f:20:08:00 is flapping between port 1/2 and port 4/39 Use the steps and guidelines in this section in order to understand and troubleshoot the cause of this error message.
The message indicates that your Catalyst 4500/4000 switch has learned a MAC address that already exists in the content-addressable memory (CAM) table, on a port other than the original one. This behavior repeatedly occurs over short periods of time, which means that there is address flapping between ports.
If the message appears for multiple MAC addresses, the behavior is not normal. This behavior indicates a possible network problem because the MAC addresses move quickly from one port to another port before the default aging time. The problem can be looping traffic on the network. Typical symptoms include:
High CPU utilization
Slow traffic throughout the network
High backplane utilization on the switch
For information on how to identify and troubleshoot issues with spanning tree, refer to Spanning Tree Protocol Problems and Related Design Considerations.
这是我看国外一个人的日志，意思就是出现这个问题就是你的交换机通过学习到的mac地址在寻址地址表里已经存在了，如果反复出现就说明网络有问题，症状有高cpu利用率，整个网络慢，交换机的背板利用率低，建议通过这两个端口和查看mac地址，找出mac是从什么地方学习来的，然后确定问题