#Known Issue
if on Cisco IOS unter the router ospfv3 process the address-family ipv4 then the snmp access needs to be in a seperate snmp context :-( . There is no still no access to IPv4 data, also not for VRFs :-(
router ospfv3 10
!
address-family ipv4 unicast
router-id 1.1.1.30
snmp context IPv4
exit-address-family
!
address-family ipv6 unicast
router-id 1.1.1.30
snmp context IPv6
exit-address-family
!
snmp-server context IPV6
snmp-server group IPV6 v3 priv context IPV6
snmp-server user IPV6 IPV6 v3 auth sha authtpw priv aes 128 privpw
snmp-server context IPV4
snmp-server group IPV4 v3 priv context IPV6
snmp-server user IPV4 IPV4 v3 auth sha authtpw priv aes 128 privpw
!