Comment 0 for bug 1880532

ECMP is a kind of routing technology which allows multiple different links reach the same destination. Thanks to ECMP has supported by linux kernel, neutron can simply support ECMP by using linux command line and adding route entry into qrouter namespace.

An ECMP entry looks like：
ip route replace to <destination_ip> nexthop via <nexthop_ip1> nexthop via <nexthop2>

Since Octavia has proposed an active-active load balancing design on https://review.opendev.org/#/c/723864/ and this design need ecmp support in neutron, I hope ECMP can be supported as soon as possible.