hey, I have a problem with my packet tracer file, so first I need to subnet the ipv6, and then I need to assign each router with a specific IPv6 address. However, I don't know how you started configuring the routers also there were hints on the packet tracer file that I need do the following. 1. Replace ISDN with a regular serial link as ISDN is no longer part of your curriculum
2. Use the IP OSPF cost statement with the higher cost along the missing link as a fallback link.
