Hi,

We are facing problem with Arp cache timeout. 

System being used is as below -
Board (having Octeon processor) is running Linux(3.10.34) with one of the 
Ethernet interface connected to NIC card which is then connected to a Windows 
PC. 
Default value for base_reachable_time_ms is set to 30000 on board. 
Traffic(ping) is send from PC to Board. 
"ip neigh" shows the arp being resolved & entry status as reachable. After some 
time (20-40 sec), the status changes to stale.

Now we change the value of base_reachable_time_ms to 100000. But resulting 
timeout does not change. The stale status is reached within same 20-40 sec.
This behavior remains forever. Even if we assign different values to 
base_reachable_time_ms, still no change in time out.

Only when system is restarted the new value is effective.

Can you please let us know if you have some idea about this issue and what may 
be the probable cause.


~Regards
Rohit Agarwal

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