https://www.server24.eu/private-cloud/solve-neighbor-table-overflow-messages/ https://www.server24.eu/private-cloud/solve-neighbor-table-overflow-messages/
当arp cache存活超过5s的条目大于gc_thresh2会触发gc 当arp cache条目大于gc_thresh3时会触发gc,gc后仍然大于gc_thresh3则报错arp_cache: neighbor table overflow! 但是由于flannel这个arp配置是flannel自动配置成permanent,所以无法被gc,也就是一旦大于了gc_thresh3就无法添加新的arp cache条目 解决 提高arp_cache的...
当前arp 记录数接近 gc_thresh3 比较容易 overflow,因为当 arp 记录达到 gc_thresh3 时会强制触发 gc 清理,当这时又有数据包要发送,并且根据目的 IP 在 arp cache 中没找到 mac 地址,这时会判断当前 arp cache 记录数加 1 是否大于 gc_thresh3,如果没有大于就会 时就会报错: arp_cache: neighbor table ove...
ARP only works with 32-bit IP addresses in the older IPv4 standard. The newer IPv6 protocol uses a different protocol, Neighbor Discovery Protocol (NDP), which is secure and uses cryptographic keys to verify host identities. However, since most of the Internet still uses the older IPv4 protoc...
内核日志会有有下面的报错:arp_cache: neighbor table overflow!查看当前 arp 记录数:$ arp -an | ...