pi3141
Contributor
Contributor

Thank you to everyone.

Putty worked for me in the end.

arp-a listed about 6 entries, the default gateway, another router and several vacant IP's, it didn't list a single MDU IP address.

I pinged the broadcast address and only got about 15 to 20 replies from MDU's from a network of 300 MDU's!

After about 10 minutes it seems the router lost those as arp -a was only listing the first group of a few IP's again.

I'm a bit out of my depth as you can probably tell, Smiley Happy so I explained what I had found to one of our specialists, might be helpful as another a avenue of investigation as the problem is still unresolved.

Thanks again everyone, I managed to achieve what I set out to do, although I don't understand what I've done.

Can anyone tell me if what I found was normal? Should I have seen all the MDU IP addresses? How long generally before the arp table ages out? Does this  behavior suggest a problem? 

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