Bug 2231273

Summary: [RFE] Request to support OVN L3 HA when external network failure.
Product: Red Hat OpenStack Reporter: youngcheol <yocha>
Component: python-networking-ovnAssignee: Miro Tomaska <mtomaska>
Status: NEW --- QA Contact: Eran Kuris <ekuris>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 16.2 (Train)CC: apevec, fyanac, lhh, majopela, scohen
Target Milestone: ---Keywords: FutureFeature
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Description youngcheol 2023-08-11 08:06:21 UTC 
Description of problem:

OVN Layer 3 high availability can not detect External network failures.
but there is a request to make it work and automatically HA.


https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/16.2/html/networking_guide/assembly_work-with-ovn_rhosp-network#l3-ha-ovn_work-ovn
Note: 
  External network failures are not detected as would happen with an ML2-OVS configuration.
  
L3 HA for OVN supports the following failure modes:
  - The gateway node becomes disconnected from the network (tunneling interface).
  - ovs-vswitchd stops (ovs-switchd is responsible for BFD signaling)
  - ovn-controller stops (ovn-controller removes itself as a registered node).
  
  
  

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