[LARTC] ARP limit ?

[Roberto Nibali]

Hello,

> yep, i'm using them, i needed to know the max and anyone experiencing 

Those are int and nothing in the kernel code prevents them having 
MAX_INT-1 assigned as a value. However you have a rather serious 
networking problem anyway if you exceed the predefined gc* values.

Some more information (besides reading the related kernel code):

http://www.rstack.net/arp.html
http://www.rstack.net/tuning_proc_for_arp.html

> problems with very big arp's

Yes, the time spent in the GC to reach the equilibrium is rather high 
with a high number of stale cache entries. Once gc_tresh3 threshold 
kicks in you get an aggressive table flush concurrent with the new 
neighbour entries.

> arpd is marked as depricated or so!?

No, not at all ;).

Best regards,
Roberto Nibali, ratz
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