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1. Create tier B using network offering with Service=Lb, Provider=InteralLBVm
2. Acquire guest IP address - Ip1 - from the tier B.
3. Create Internal Load Balancer LB1 for Ip1, public port 80, private port 80. The new internal LB VM starts up with the Ip1.
4. Add vm1 to the LB1. The rule for Ip1/VM1/ports 80:80 is configured inside the HA proxy
5. Add vm2 to the LB1. The rule for IP1/VM2/80:80 is configured inside the HA Proxy
6. Create Internal Load Balancer LB2 for IP1, public port 81, private port 81. No need to start a new Internal LB vm as it's been already started for IP1.
7. If you want to manage access from tier A to tier B, setup Network ACLs

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API and orchestration level

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