Hi All,
I have observed that when the ARP cache is full , any further networking
apps fail with error "Neighbour table overflow" until a timer expires and
the cache is cleared. Below is a detailed re-creation scenario....
1) Set /proc/sys/net/ipv4/neigh/default/gc_thresh1,2,3 to values 2
2) ping one_neighbour ( arp cache now has this entry )
3) ping another_neighbour ( arp cache has now 2 entries )
4) ping third_neighbour
Neighbour table overflow
Ping: No buffer space available
Until the timer expires and the arp cache gets cleared , no further network
connections succeed.
IMHO, in situations wherein stale entries do exist in the cache and the
cache is full, then one should not wait for a timer expiry but remove a few
entries asap.
I get a feeling it might violate some rfc's , but i am not really sure....
Any feedback ?
Regards,
Raj
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This archive was generated by hypermail 2b29 : Wed Jan 23 2002 - 21:00:14 EST