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[Yair Fried <yfried@xxxxxxxxxx>]

Public bug reported:

Assuming l3-agents have  1 NIC (ie eth0) assigned to tenant-network (tunnel) traffic and another (ie eth1) assigned to external network,.
Disconnecting eth0 would prevent keeplived reports and trigger one of the slaves to become master. However, since the error is outside the router namespace, the original master is unaware of that and would not trigger "fault" state. Instead it will continue to receive traffic on the, yet active, external network interface - eth1.

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: l3-ha

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https://bugs.launchpad.net/bugs/1375625

Title:
  Problem in l3-agent tunnel interface would cause split-brain in HA
  router

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  Assuming l3-agents have  1 NIC (ie eth0) assigned to tenant-network (tunnel) traffic and another (ie eth1) assigned to external network,.
  Disconnecting eth0 would prevent keeplived reports and trigger one of the slaves to become master. However, since the error is outside the router namespace, the original master is unaware of that and would not trigger "fault" state. Instead it will continue to receive traffic on the, yet active, external network interface - eth1.

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