Q: 20
An engineer is tasked with designing a dual BGP peering solution with a service provider. The design must meet these conditions: The routers will not learn any prefix with a subnet mask greater than /24. The routers will determine the routes to include in the routing table based on the length of the mask alone. The routers will make this selection regardless of the service provider configuration. Which solution should the engineer include in the design?
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Discussion
D fits best. You want to filter prefixes from the provider as they come in, and applying a prefix list inbound is how you control what gets added based on mask length. Pretty sure that's what the scenario wants.
Makes sense to use a prefix list inbound here. D fits since you want to filter what gets installed from the provider based on prefix length, regardless of their config. Pretty sure that's it, but open to corrections.
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