This article describes an error message that may appear in /var/log/messages file.The following message appears in /var/log/messages file: "Neighbour table overflow"
Network issues may be encountered following this message.
The arp cache table has a limit of 8192 entries.
If the table gets full, new entries can not be added and the error message is printed to /var/log/messages file.
To watch the cache table content, run on the VAP: ip -statistics neigh show all
Please refer to the following article to manually flush the arp cache table:
How to flush the arp cache on an APM