Random connectivity issues upon network redeployment with Red Hat OpenStack Director in a VXLAN underlay network with ARP suppression
Issue
Random connectivity issues upon network redeployment with Red Hat OpenStack Director. An update of the network configuration was triggered by applying:
NetworkDeploymentActions: ['CREATE','UPDATE']
This caused restarts of the network environment. After this, random connectivity issues occur. Nodes cannot ping each other seemingly randomly until the ARP caches are cleared with arp -d <IP address>. This also affects services. Once the ARP caches are populated correctly, pcs resource cleanup needs to be run on the controllers and on the computes openstack-service restart.
The datacenter's underlay network uses VXLAN with ARP suppression (in the datacenter, not the overcloud's VXLAN network).
Environment
Red Hat OpenStack Platform 8.0
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