Which IP address will the BIG-IP use as the source address for the traffic to the pool member when client traffic is sent through the virtual server? (Choose one answer)

A. The source address will be the non-floating self IP address on the external VLAN.
B. The source address will be the first address available in the list of self IPs.
C. The source address will be the floating self IP address on the external VLAN.
D. No Option

Correct Answer: C

Brave-Dump Clients Votes

C 100%

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Anonymous User 2026-01-19 03:08:52

Selected Answers: C

The correct option is ✅ C. The source address will be the floating self IP address on the external VLAN.
Explanation
When a BIG-IP system processes traffic through a virtual server and uses SNAT Automap, it must select an IP address from its local configuration to act as the source for the request forwarded to the pool member.
Egress Interface Selection: The BIG-IP system selects a self IP address associated with the VLAN from which the traffic exits (the egress VLAN) to reach the pool member.
Floating vs. Non-Floating: In a high-availability (HA) configuration, the system prioritizes the floating self IP address on that egress VLAN. This ensures that if a failover occurs, the standby unit can continue the session using the same source IP address that the backend server is already expecting for the return traffic.
Fallback Logic: If no floating self IP is defined on the egress VLAN, the system may fall back to a floating self IP on a different VLAN, or finally, a non-floating self