Two Arm Topology

About

In load balancer technology, the Two Arm Topology refers to the management of traffic using two separate network interfaces or VLANs on the TR7. It is a topology where incoming traffic from the client comes to VLAN 10 on the TR7 and is forwarded to the target Backend Service over VLAN 20.

Example Topology

LOGO

In the example Two Arm Topology, the first 10G network interface used by the TR7 is seen on the VLAN 102 route table, while the other 10G network interface is defined on VLAN 101. The 172.16.102.113 IP address, which is the VIP address, is defined as the vService IP address on VLAN 102. The 172.16.101.40 and 172.16.101.41 IP addresses defined on VLAN 101 are defined as Interface IPs and are used for health checks and traffic forwarding to the Backend Services. TR7 receives traffic over the VLAN 102 network and forwards it to the Backend Services over the VLAN 101 network using two different network interfaces or VLANs.

Interface

Step > 1

Two different route tables were added for VLAN 101 and VLAN 102 by following the "Network > Route Tables" steps.

Step > 2

By following the "Network > Interfaces" steps, the relevant 10G network interfaces were included in the added Route Tables, and IP addresses were added. For VLAN 102, the 172.16.102.111 and 172.16.102.112 IP addresses were defined as "Interface IP," and the 172.16.102.113 IP address was defined as the "VIP" address. For VLAN 101, the 172.16.101.40 and 172.16.101.41 IP addresses were defined as "Interface IP".

Step > 3

By following the "Traffic Manager > Backend Services" steps, the relevant server's Route Table was selected as VLAN 101. When Details are activated, a specific network interface and IP address can be selected through SNAT. If no selection is made, communication will be made via the first Interface IP addresses on the relevant route table, namely 172.16.101.40 and 172.16.101.41.

Step > 4

Finally, a vService was created with the 172.16.102.113 VIP address on the vServices screen, and the relevant Backend Service was selected as the default.