feasibility condition

Three Labeled Cards Defining Successor As The Route In Use, Feasible Distance As The Local Router'S Total Cost, And Feasible Successor As A Pre-Verified Instant Backup
CCNA

Successor, Feasible Successor, and Feasible Distance

DUAL relies on three closely related concepts to decide which route goes in the routing table and which routes stand ready as instant backups. This guide defines each one precisely, works through a real Feasibility Condition check using the same topology and numbers established in How to Calculate EIGRP Metric, and covers how OSPF’s fundamentally...

Muhammad Khattak 8 min read
Diagram Showing Router R1 Load Balancing Traffic Across Two Equal Paths Through Routers R2 And R3
CCNA

Network Load Balancing: Equal-Cost and EIGRP Unequal-Cost Routing

When a router has more than one valid path to the same destination, it needs a way to decide what to do with all of them — use only the best one, or spread traffic across several. That decision is network load balancing, and understanding exactly how routers make it, right down to which paths...

Muhammad Khattak 8 min read
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