DHCP Problems?

I was having a problem with a Netgear Router.  After running for 12 - 18 hours, the router was fall over.  I noticed strange activity from my BluRams A31 cameras, a very high rate of DHCP messages, specifically, DHCPv6 Solicit XID.   When I remove the cameras from the network, the router and everything else works fine.   Has anyone else had this experience?