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[–]Wigwag85 3 points4 points  (1 child)

Did you clear out the arp cache before setting the new arp entry?

[–]as7105[🍰] 0 points1 point  (0 children)

And if that does not help, or just to explore, checking the actual CEF info could help. Show adjacency or show ip cef or something like that depending on the platform.

Quite possible that the router will not use some ranges of MAC addresses.

[–]jml88 0 points1 point  (0 children)

Would you mind posting the ARP address of the server and also the output of show ip arp I just configured this on an 1841 running Version 15.1(4)M12a and it worked as expected. What IOS are you running?