Most likely cause of network input errors?

I only have a single vlan on that interface and it is just a standard gigabit port negotiated at 1000 full. I'm seeing the IN errors and a lot of drops in interface statistics on the F5 GUI. I know drops are not unusual, but this is a disproportionate number compared to my other interfaces. I have done a TCP dump for that interface. I'm not a network guru, but usually figure it out if I stare long enough. A couple things that don't look right to me...

There is a ton of ARP broadcast traffic and even though the network is 10.14.8 I'm seeing ARPs for 10.14.9 as well. This really doesn't seem right to me.

I'm seeing some ICMPv6 traffic and we're not using IPv6 yet.

I know I really need to work with my network admin on this, but was hoping someone had seen it before and might have some pointers.

Thanks for any help!

Chris