3.5.f Implement and troubleshoot load-balancing

3.5.f [ii] unequal-cost

Unequal cost path load balancing is applicable when different paths to a destination network are of different routing metric values. The variance command determines which of these routes is used by the router.

Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 3215-3217).  . Kindle Edition.

http://www.informit.com/library/content.aspx?b=CCIE_Practical_Studies_I&seqNum=126