Hello We are using HAProxy version 1.5.11, released 2015/01/31 in front of Exchange 2013 in lab.
Not sure if it a bug but stats for server 1 don't show "other responses" but in total of the backend the "other responses" show number. Server 1 stats ============== Cum. sessions: 132 Cum. HTTP responses: 67 - HTTP 1xx responses: 0 (0%) - HTTP 2xx responses: 1 (1%) - HTTP 3xx responses: 0 (0%) - HTTP 4xx responses: 66 (98%) - HTTP 5xx responses: 0 (0%) - other responses: 0 (0%) Avg over last 1024 success. conn. - Queue time: 0 ms - Connect time: 1 ms - Response time: 1 ms - Total time: 114 ms Server 2 stats ============== Cum. sessions: 132 Cum. HTTP responses: 131 - HTTP 1xx responses: 0 (0%) - HTTP 2xx responses: 65 (49%) - HTTP 3xx responses: 0 (0%) - HTTP 4xx responses: 66 (50%) - HTTP 5xx responses: 0 (0%) - other responses: 0 (0%) Avg over last 1024 success. conn. - Queue time: 0 ms - Connect time: 1 ms - Response time: 2 ms - Total time: 4508 ms Total of the backend ===================== Cum. sessions: 264 Cum. HTTP requests: 258 - HTTP 1xx responses: 0 - HTTP 2xx responses: 63 Compressed 2xx: 0 (0%) - HTTP 3xx responses: 0 - HTTP 4xx responses: 132 - HTTP 5xx responses: 0 - other responses: 63 Intercepted requests: 0 Avg over last 1024 success. conn. - Queue time: 0 ms - Connect time: 1 ms - Response time: 2 ms - Total time: 4332 ms Regards, Eric Bellavance