OSPFv3 Load Balancing ******
The OSPFv3 load balancing concept is again similar to the corresponding OSPFv2 concept. Also, the exact same command is used to make equal-cost load balancing happen. When an OSPFv3 router has multiple routes to reach one subnet, each with the same metric, the router can put multiple equal-cost routes in the routing table. The maximum-paths number command is used in router configuration mode to define just how many such routes can be added by OSPFv3 to the IPv6 routing table. For example, if a network has six equal-cost routes, and you want all routes to be used, you should configure the router with maximum-paths 6 subcommand under the ipv6 router ospf command. ////
Injecting Default Routes *****
OSPFv3 can advertise a default route and the feature again works much like OSPFv2. This feature allows an OSPFv3 router to have a default route and then tell all other routers, to use that default route. ////
If a company has a single IPv6 enabled Internet connection, it can use a default IPv6 route to send all IPv6 traffic out that one link to the Internet. All the internal routers need to send traffic to the single Internet facing router: ///
All routers learn specific routes to subnets inside the company network, so the default route is not used for destinations inside the company. ************
The router facing the Internet has a static default IPv6 route that points all IPv6 traffic not matching any other specific route to the Internet. ***********
All routers learn the default route from the Internet facing routers over OSFPv3 and send all IPv6 packets not matching specific routes to the Internet facing router that, in turn, sends them to the Internet.