Load Balancing in EIGRP

Load Balancing in EIGRP
There can be up to six entries in the routing table for the same destination :
1. The number of entries is configurable
2. The default is four
3. Set to 1 to disable load balancing
Equal cost load balancing is the ability of router to distribute all the traffic over all it’s network port that are the same metric from the destination address
Load balancing increases the use of network segment and increase effective network bandwith
How to configure equal balancing
Router(config-router)#variance multiplier
Variance example :





from this picture we assume router E choose router C to reaching network Z because it have lower FD
with use variance 2 command ,router E choose router B to get network Z
because (20 + 10 ) < (2*(FD)20 =40 )
→ 30 < 40 ( true )
with used variance 2 router D is never considered to get network Z because
(20 +25 ) < (2 *(fd)20)
45 < 40 (false )
NB : if You want router D get network Z you can increase your variance value