IPv4 and IPv6 ECMP load balancing
You can use the following command to configure the IPv4 ECMP load balancing method for a VDOM:
config system settings
set v4-ecmp-mode {source-ip-based | weight-based | source-dest-ip-based}
end
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With VDOM-based session tables enabled, the FortiGate-7000E supports all IPv4 ECMP load balancing methods supported by FortiOS except usage-based. |
See this link for information about how to support IPv6 ECMP load balancing: Technical Tip: ECMP – Load balancing algorithms for IPv4 and IPv6.