Connect to xxx failed: No buffer space available

#ping xxxx
connect: No buffer space available

Neighbour table overflow messages.

To fix this, I had to increase the ARP table space. To do this permanently:
Edit /etc/sysctl.conf and add the following lines:
net.ipv4.neigh.default.gc_thresh1 = 1280
net.ipv4.neigh.default.gc_thresh2 = 5120
net.ipv4.neigh.default.gc_thresh3 = 10240

# sysctl -p

For a temporary fix:
echo 1280 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
echo 5120 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
echo 10240 > /proc/sys/net/ipv4/neigh/default/gc_thresh3



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