6c9a282bcd
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 b119247bea89aec5604e7ac61675aed240195931) (cherry picked from commit 270912a8c7da8aace6b8b23dde690007ba2ccf2d)