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ARP going nuts?

I have an Android phone connected to company Wi-Fi.  I noticed recently the download arrow is always on.  A little research shows that this is due to broadcast and/or multicast traffic.  I fire up Wireshark and notice something seems to be up with extremely high ARP traffic (~75%).  I did install a new AD / DNS server a few weeks ago.  This could have started at the same time?

User generated imageThere is no recurring themes with the source & destination.  It varies a ton.

Any ideas to look for?

thanks
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Ugo Mena
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Sorry for the slow response - had a busy weekend.  

We only have about 20-30 wireless devices spread over 4-5 AP's.  They are connected to L2 HP switches.  

We have some VLAN segmentation.... but something doesn't seem right.