In a global server load balancing (GSLB) active-active environment, when the connection is proxied, which is used to source the traffic?

In a global server load balancing (GSLB) active-active environment, when the connection is proxied, which is used to source the traffic?

• A. Subnet IP (SNIP)
• B. LDNS IP Address
• C. Client source IP
• D. Virtual IP (VIP)

Answer: (A)

In a GSLB setup where the ADC proxies the connection, the traffic from the ADC to the real servers is sourced from the Subnet IP (SNIP). The SNIP is the address the ADC uses to originate outbound traffic in its subnet, so the backend servers see the SNIP as the source and reply back to the ADC. The client’s IP is not exposed to the origin servers in proxied mode, which is why the SNIP, not the client IP, becomes the source of the traffic. The Virtual IP (VIP) is the front-end address clients connect to, and the LDNS IP is used for DNS resolution, not for the actual data path.

In a GSLB setup where the ADC proxies the connection, the traffic from the ADC to the real servers is sourced from the Subnet IP (SNIP). The SNIP is the address the ADC uses to originate outbound traffic in its subnet, so the backend servers see the SNIP as the source and reply back to the ADC. The client’s IP is not exposed to the origin servers in proxied mode, which is why the SNIP, not the client IP, becomes the source of the traffic. The Virtual IP (VIP) is the front-end address clients connect to, and the LDNS IP is used for DNS resolution, not for the actual data path.