Alert pool member down

Hi all,

We configured f5 as a Load balancer for EXCHANGE 2013 using exchange IAPP, Its working fine, We have enabled pool member up/status monitor on F5, The problem was we got a very frequent alert from F5 like below. During the alert time the respective server in up status only, we can able to ping the server. Pls suggest us to resolve this.

01070638:5: Pool /Common/EXCH_SMTP_25_POOL member /Common/192.168.11.3:25 monitor status down. [ /Common/EXCH2013_EXCH_SMTP: down ] [ was up for 5hrs:58mins:54sec ]None 01070638:5: Pool /Common/EXCH_SMTP_587_POOL member /Common/192.168.11.2:587 monitor status down. [ /Common/EXCH_SMTP_587: down ] [ was up for 215hrs:13mins:26sec ]None 01070638:5: Pool /Common/EXCH_SMTP_587_POOL member /Common/192.168.11.3:587 monitor status down. [ /Common/EXCH_SMTP_587: down ] [ was up for 5hrs:58mins:54sec ]None 01070638:5: Pool /Common/Exchatestpool member /Common/192.168.11.156:443 monitor status down. [ /Common/gateway_icmp: down ] [ was up for 24hrs:51mins:51sec ]None 01070638:5: Pool /Common/Exchatestpool member /Common/192.168.11.157:443 monitor status down. [ /Common/gateway_icmp: down ] [ was up for 16hrs:57mins:23sec ]None 01070638:5: Pool /Common/EXCH2013_AAAPOOL member /Common/132.147.161.191:0 monitor status down. [/Common/gateway_icmp: down ] [ was up for 115hrs:25mins:13sec ]None 01070638:5: Pool /Common/EXCH2013_AAAPOOL member /Common/WSEXCH2013_AD02:0 monitor status down. [/Common/gateway_icmp: down ] [ was up for 214hrs:59mins:44sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_ad_pool7 member /Common/192.168.11.2:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_ad_https_monitor: down ] [ was up for 149hrs:0min:4sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_ad_pool7 member /Common/192.168.11.3:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_ad_https_monitor: down ] [ was up for 112hrs:51mins:4sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_as_pool7 member /Common/192.168.11.2:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_as_https_monitor: down ] [ was up for 179hrs:40mins:54sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_as_pool7 member /Common/192.168.11.3:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_as_https_monitor: down ] [ was up for 40hrs:51mins:1sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_imap4_pool7 member /Common/192.168.11.2:993 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_imap4__USER_eav_monitor: down ] [ was up for 109hrs:24mins:59sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_imap4_pool7 member /Common/192.168.11.3:993 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_imap4__USER_eav_monitor: down ] [ was up for 5hrs:59mins:30sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_oa_pool7 member /Common/192.168.11.2:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_oa_https_monitor: down ] [ was up for 46hrs:0min:52sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_oa_pool7 member /Common/192.168.11.3:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_oa_https_monitor: down ] [ was up for 46hrs:35mins:22sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_owa_pool7 member /Common/192.168.11.2:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_owa_https_monitor: down ] [ was up for 71hrs:57mins:33sec ]None 01070638:5: Pool /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_owa_pool7 member /Common/192.168.11.3:443 monitor status down. [ /Common/EXCH2013_EXCH_LB.app/EXCH2013_EXCH_LB_owa_https_monitor: down ] [ was up for 96hrs:53mins:23sec ]None