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Cisco CCNA Routing and Switching ICND2 200-101 Official Cert Guide by Wendell Odom

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OSPFv3 Metrics and IPv6 Routes

At the end of all this noise about LSAs, database exchange, matching parameters for neighbors, and so on, the routers need to choose the best IPv6 routes to use. This final topic of the chapter reviews a few verification steps for how OSPFv3 calculates the metrics, and then looks at some more troubleshooting tips—this time about what to do with missing or suboptimal IPv6 routes.

Verifying OSPFv3 Interface Cost and Metrics

The SPF algorithm looks for all possible routes, or paths, from the local router to each and every subnet. When redundant paths exist between the local router and some remote subnet, the SPF algorithm has to pick the better route, based on the lower metric of the end-to-end route, as in the example ...

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