neighbor table overflow

增加數值
/proc/sys/net/ipv4/neigh/default/gc_thresh1
/proc/sys/net/ipv4/neigh/default/gc_thresh2
/proc/sys/net/ipv4/neigh/default/gc_thresh3

echo "net.ipv4.neigh.default.gc_thresh1 = 512" >> /etc/sysctl.conf
echo "net.ipv4.neigh.default.gc_thresh2 = 2048" >> /etc/sysctl.conf
echo "net.ipv4.neigh.default.gc_thresh3 = 4096" >> /etc/sysctl.conf
sysctl -p