Comment 3 for bug 1810536

Reviewed: https://review.openstack.org/634075
Committed: https://git.openstack.org/cgit/openstack/networking-vpp/commit/?id=9598c5963d0638cb5ea55f9b5f24363ee6433c23
Submitter: Zuul
Branch: master

commit 9598c5963d0638cb5ea55f9b5f24363ee6433c23
Author: Naveen Joy <email address hidden>
Date: Mon Jan 28 14:33:03 2019 -0800

    Support for multiple router gateways on the floating network.

    Since the VPP does not support overlapping IP addresses on a
    subnet, the solution adds an independent route to the VPP's
    local interface each time an additional router is added on the
    floating network. The first router's gateway IP address is set
    on the BVI loopback and this address becomes the primary gateway
    IP address. Each subsequent router's gateway IP address is added
    as a local route. When the primary gateway is deleted, if a
    valid local IP address exists, it is migrated to the BVI
    loopback interface. Upon deleting an external gateway, the BVI
    loopback is only deleted if no valid local IPs exist on the
    floating network.

    Change-Id: I945056fad31e599833e706ee627fe444e32ed606
    Closes-Bug: #1810536