Symptom:
A Nexus 9000 series switch may have an inconsistent routing information base for IPv6, ip forwarding information 
base for ipv6 and hardware programming from what the configuration states with regards to default static route.

Conditions:
This can occur if a floating IPv6 static default route is configured and other static routes are configured with L3 
prefix component as the next-hop.  The configuration changes significantly - the exact steps that lead to the
problem are not known.  Once all of the static routes are removed the IPv6 traffic continues to flow through the
switch when it should not.  This occurs because the RIB, FIB and hardware are still programmed (incorrectly)
but the configuration does not have the route anymore.