Add ECMP support in neutron

Registered by XiaoYu Zhu

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 address ECMP by using linux command line and adding route entry into qrouter namespace. 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, ECMP should be supported as soon as possible.

RFE: https://bugs.launchpad.net/neutron/+bug/1880532

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
XiaoYu Zhu
Direction:
Approved
Assignee:
None
Definition:
Approved
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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