Chapter 3 Advanced Routing : Border Gateway Protocol (BGP) : Redistributing and blocking routes in BGP : Configuring the FortiGate unit : Configuring ECMP support for BGP
  
Configuring ECMP support for BGP
"ECMP" stands for "Equal Cost Multiple Path". ECMP is a mechanism that allows multiple routes to the same destination with different next-hops and load-balances routed traffic over those multiple next-hops.
ECMP only works for routes that are sourced by the same routing protocol (that is: Static Routes, OSPF, or BGP).
ECMP is enabled by default with 10 paths.
ECMP with static routes is effective if the routes are configured with the same distance and same priority.
To configure ECMP support - CLI
config router bgp
set ebgp-multipath disable[|enable]
set ibgp-multipath disable[|enable]
...
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