SONiC ECMP calculator PR tracker #4
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The purpose of ECMP calculator is to calculate which IP interface ECMP will choose and return the physical interface packet will egress from. Packet is defined by a JSON file given as an argument to the tool.
An equal cost multipath (ECMP) is formed when routing table contains multiple next hop addresses for the same destination IP address. ECMP will load balance the outbound traffic between the IP interfaces.