Editing Enhanced Interior Gateway Routing Protocol (section)

===Unequal Path Cost Load Balancing ===
EIGRP features load balancing on paths with different costs. A multiplier, called variance, is used to determine which paths to include into load balancing. The variance is set to 1 by default, which means load balancing on equal cost paths. The maximum variance is 128. The minimum [[metrics (networking)|metric]] of a route is multiplied by the variance value. Each path with a metric that is smaller than the result is used in load balancing.<ref name=variance>[http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13677-19.html How Does Unequal Cost Path Load Balancing (Variance) Work in IGRP and EIGRP] Cisco. Retrieved on 2017-03-24</ref>

With the functionality of the Unequal Path Cost Load Balancing on EIGRP, [[OSPF]] protocol is unable to design the network by Unequal Path Cost Load Balancing. Regarding the Unequal Path Cost Load Balancing function on industry usage, the network design can be flexible with the traffic management.