Virtual SBC when a standby node reboots, it use the Virtual MAC
A virtual environment based on Vmware we have notice a starnge behaviour that impact the HA cluster.
The issue appear when a cluster member reboot and is characterize by a lost of all session agent which are an distant network or any equipment which is located on a distant network.
What we have noticed on this issue is.
After the reboot the standby SBC send an RARP broadcast message with the virtual shared MAC address of the cluster.
This message is use by the virtual logical switch to update is mac table resulting in changing the location of the virtual MAC address.