6c9a282bcd36d744d1ad753afd8e7a219b1189c4
When HA router is created in "stanby" mode, ipv6 forwarding is
disabled by default in its namespace.
But when router is transitioned to be "master" on node, ipv6
forwarding should be enabled. This was fine for routers with
configured gateway but we somehow missed the case when router don't
have gateway configured.
Because of that missing ipv6 forwarding setting in such case, IPv6
W-E traffic between 2 subnets was not working fine in L3 HA case.
This patch fixes it by adding configuring ipv6_forwarding on
"all" interface in router's namespace always, even if it don't have
gateway configured.
Conflicts:
neutron/tests/functional/agent/l3/framework.py
neutron/tests/unit/agent/l3/test_agent.py
Change-Id: I8b1b2b426f7a26a4b2407a83f9bf29dd6e9ba7b0
CLoses-Bug: #1818224
(cherry picked from commit b119247bea)
(cherry picked from commit 270912a8c7)
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