Black Hole Routing Manual
351
due to some reasons such as incorrect network address mask, and incorrect
management distance. Attention should be paid to the following items:
IPv6 should be enabled before IPv6 Black Hole Routing can work.
It is suggested that the length of the network address mask should be longer than that
of normal routing configuration, in order to prevent the Black Hole Routing from
intervening other routing configuration.
When the network address mask of Black Hole Routing configuration is the same with
some other configuration, it is suggested that the distance of Black Hole Routing is
set lower.
For problems that cannot be fixed through above methods, please issue the
command show ip route distance and show ip route fib, and show l3. And copy and paste
the output of the commands, and send to the technical service center of our company.