During maintenance in a round-robin load-balanced environment, which action is most efficient to divert traffic away from a single backend server without affecting others?

During maintenance in a round-robin load-balanced environment, which action is most efficient to divert traffic away from a single backend server without affecting others?

• A. Disable the backend service entity targeted for change.
• B. Disable the backend server entity targeted for change.
• C. Disable the load-balancing vServer.
• D. Unbind the correct server entity from the load-balanced resources.

Answer: (B)

In a round-robin load-balanced setup, you want to remove just one node from rotation during maintenance without disturbing the rest. Disabling the backend server entity achieves this by marking that entire server as down, so the load balancer stops sending new requests to it. The other healthy servers continue handling traffic exactly as before, keeping the rest of the pool unaffected. Disabling the vServer would stop traffic for everyone behind that vServer, not just one node. Unbinding the server would remove it from the pool but adds an extra step and requires re-binding later, which is less convenient during maintenance. Disabling a specific service on that server would only stop traffic for that particular service, not necessarily preventing the server from receiving other traffic through other services.

In a round-robin load-balanced setup, you want to remove just one node from rotation during maintenance without disturbing the rest. Disabling the backend server entity achieves this by marking that entire server as down, so the load balancer stops sending new requests to it. The other healthy servers continue handling traffic exactly as before, keeping the rest of the pool unaffected.

Disabling the vServer would stop traffic for everyone behind that vServer, not just one node. Unbinding the server would remove it from the pool but adds an extra step and requires re-binding later, which is less convenient during maintenance. Disabling a specific service on that server would only stop traffic for that particular service, not necessarily preventing the server from receiving other traffic through other services.