here's a gross oversimplification:IPv4 and IPv6 are both address formats for the internet, IPv4 being the original format. IPv4 look like 192.168.0.1. IPv6 addresses were created because we are going to run out of IPv4 addresses with all the device...
This is exactly my last remaining issue from Fridays outage. Ongoing this morning in L3T.Makes me think the outage was IP4 address related. I've never had V6 without V4. Weird.