In an OSPF network, users in a particular OSPF non-backbone area are complaining about slow access speeds to a shared corporate resource in another OSPF area. Traceroutes show that theusers are taking a suboptimal default route to the destinations. Which solution will improve access speed?

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D. Leak specific summaries on the ABRs for the remote subnets in addition to the default. Having ABRs inject specific summary routes for the remote subnets into the non-backbone area enables longest-prefix match forwarding, so routers select the optimal path to those destinations rather than falling back to the coarse default route.

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A. Make the area totally stubby so that the default can be followed along the best path. Converting the area to totally stubby still injects only a single default route, which is exactly the suboptimal path the users are already following.

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B. Create a virtual link between the areas so that traffic can shortcut directly between them. Virtual links reconnect a partitioned non-backbone area to Area 0 and do not create shortcut forwarding paths between two arbitrary non-backbone areas.

Answer

C. Implement policy routing to channel the traffic in the optimal direction. Policy routing can redirect traffic but adds operational complexity and does not address the root cause, which is the absence of specific routing information in the area.

In an OSPF network, users in a particular OSPF non-backbone area are complaining about slow access speeds to a shared corporate resource in another OSPF area. Traceroutes show that theusers are…

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