EIGRP & DUAL — The Feasibility Condition

Advanced distance vector with DUAL: per-destination, loop-free by math, near-instant failover when a backup already exists. Protocol 88, multicast 224.0.0.10, AD 90 internal / 170 external. The vocabulary FD = your total metric to the prefix. RD = what the neighbour reports as its own distance. Successor = lowest FD, installed in the RIB. Feasible […]