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"ip route get x.x.x.x" command returns 'RTNETLINK answers: No buffer space available' Technical Level
  • The 'ip route get x.x.x.x' command generates output: "RTNETLINK answers: No buffer space available".
  • 'kernel: neighbour table overflow' message appears repeatedly in /var/log/messages file.
  • ping x.x.x.x connect: No buffer space available.
  • Firewall Logs show drops for "Missing OS route".

The ARP cache is overflowing. The most possible reason - too much traffic on the network (generated by some application, by some hosts, or by related factors).

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