[j-nsp] Odd issue with ARP in different subnet

[Phil Mayers]

On 03/10/2011 02:09 AM, Chris Adams wrote:
> Once upon a time, Keegan Holley<keegan.holley at sungard.com>  said:
>> I don't think the server should arp for 10.1.1.5 from 10.2.2.2.  Devices
>> don't usually arp (or answer) for things that aren't in the same subnet.
>
> Can you name anything (other than the EX) that behaves as you describe?

We've seen this cause problems with other (non-Juniper) things. I think 
Windows barfs on it in certain versions. It's probably a bug in JunOS in 
theory, but in my experience you'll need to change the ARP sysctl values 
to be 100% sure of it working.