ipv6 pim dr-priority

The no form of this command restores the default DR priority value, 1.

You must enable PIM globally before you enable it on an interface.

If more than one device has the same DR priority on a subnet (as in the case of default DR priority on all), the device with the numerically highest IPv6 address on that subnet is elected as the DR.

The DR priority information is used in the DR election only if all the PIM devices connected to the subnet support the DR priority option. If at least one PIM device on the subnet does not support this option, the DR election falls back to the backwards compatibility mode in which the device with the numerically highest IPv6 address on the subnet is declared the DR regardless of the DR priority values.