Unremovable ARP entry and 'address already in use'

[Eric van Gyzen]

> On 3/19/2015 午前 11:20, Paul S. wrote:
>> root at ipfw-0:~ # arp -d 110.62..211.87
>> arp: writing to routing socket: Invalid argument

I have a vague memory of similar behavior when I had a misconfigured
route.  I think there was a route for a local interface address with an
off-box gateway.  (Don't ask.  Long story.  Not my fault!  :) )

Eric