Hi, I am building R81.20 CloudGuard Cross AZ Cluster.
Used template in sk111013 (new VPC, R81.20, cross availability zone cluster for transit gateway) stack deployed ok.
At steps to create cluster in Smart Console and push policy to it
Got to https://sc1.checkpoint.com/documents/IaaS/WebAdminGuides/EN/CP_CloudGuard_for_AWS_Cross_AZ_Cluster/C...
Step 11, add an alias interface, in AWS console the secondary private IP address of both cluster members is the same

Although the cluster configuration was able to be published with the same IP address on both cluster members I was not able to install policy, with error "check point duplicate keys "<0a030a1d>" in table 'cluster_members_ids_by_ips'"
If someone could confirm that the 2 cluster members are meant to have the same secondary private IP of external interface, that would help provide a starting point for troubleshooting the policy install error.
Cheers
Andrew