Problem Summary An enterprise network running OSPF faced missing routes in one part of the topology. The issue was traced to an OSPF area type mismatch — one router was configured as a Stub area, while its neighbor was configured as NSSA (Not-So-Stubby Area). This […]
![Ticket#14 - OSPF Routes Missing: Area Type Mismatch (Stub vs NSSA) Fixed [CCNP Enterprise]](https://networkjourney.com/wp-content/uploads/2025/07/Ticket14_OSPF-Routes-Missing-Area-Type-Mismatch-Stub-vs-NSSA-Fixed_networkjourney.png)