Does FreeBSD do proactive ARP refresh?

[Andrey V. Elsukov]

On 16.03.2018 14:47, sthaug at nethelp.no wrote:
>> And thank you for that suggestion! The packet loss during ARP refresh
>> (of the destination address connected to the output interface) does
>> *not* happen when the box is forwarding! It only happens with locally
>> generated traffic.
> 
> Checking once per second with "arp -n <destination IP>" I can see the
> following behavior with net.link.ether.inet.max_age=120:
> 
> - Locally generated traffic: The ARP entry is refreshed after
> net.link.ether.inet.max_age seconds - which presumably means it
> actually expires first. And there is some packet loss.
> 
> - Transit traffic (the box is forwarding): The ARP entry is refreshed
> 5 seconds *before* net.link.ether.inet.max_age has passed, and there
> is no packet loss.

Can you test this patch? I did not tested it, but I think it should fix
this issue.

-- 
WBR, Andrey V. Elsukov
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