A large enterprise customer is planning a new WAN connection to its headquarters. The current architecture is dual homed with static routing, but users complain when a specific link fails. Failure…

Granular QoS policies manage traffic prioritization and bandwidth allocation but do not provide automatic failover or route convergence when a link goes down.

Procuring additional bandwidth increases link capacity but does not address the root cause - static routing's inability to detect link failure and reroute traffic automatically.

With static routing, the network cannot automatically detect or respond to a link failure - traffic continues to be forwarded out the failed path until an administrator manually updates the routes. Implementing a dynamic routing protocol such as BGP, OSPF, or EIGRP toward the WAN enables automatic convergence when a link fails, rerouting traffic over the remaining link with no manual intervention, which directly improves resilience and return on investment without requiring additional circuits.

Adding a third WAN link without changing to dynamic routing still leaves the network dependent on static routes, so a link failure would still require manual intervention and would not improve return on investment.