Windows 7: Problem setting ARP

I seem to have a problem setting the ARP

In the good old days of XP these commands worked like a dream:

arp -s 192.168.1.6 00-04-a3-00-a9-f9

arp -s 192.168.1.7 00-04-a3-00-a9-f9


Under Windows 7 this is no longer possible, so I have tried to revert to using netsh but it doesn't work?! e.g.

netsh interface ip delete arpcache

netsh interface ipv4 add neighbors "Local Area Connection" 192.168.1.6 00-04-a3-00-a9-f9

arp -a

Results in "No entries found"


A minute or so later "arp -a" will result in:

Interface: 192.168.11.6 --- 0xc
Internet Address Physical Address Type
192.168.11.1 00-16-01-b0-4c-9a dynamic


Anyone have any ideas what is going on, or how I can troubleshoot it?


Sincerest thanks in advance



Joe.