When the primary VCE comes up
In the previous section, the primary VCE Ali-HKVCE-Pri is powered off to test the failover. What will happen when the primary VCE Ali-HKVCE-Pri is power on back? Again, since the VCEs are not running VRRP, the HaVip 10.200.202.9 is just a secondary IP address. Thus, when the primary VCE boot up, and it needs time to initialize, including bring up the edged service and establish tunnels. Before the tunnels are up, the LAN interface should already working so the HaVip will send the traffic to the primary VCE even the primary VCE tunnels are not established yet. As a result, it is unavoidable during the primary VCE comes back, there are some instances the network connectivity between the peer VCE and the VCE in Alibaba Cloud is lost. The screen capture below shows this situation, there are 3 instances of couple ping loss during the primary VCE boot up.
