[root@monit zabbix]# tail zabbix_server.log -n 25
  1932:20140815:182910.826 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1936:20140815:182925.776 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: another network error, wait for 15 seconds
  1936:20140815:182941.149 Zabbix agent item [memory.used] on host [virt2.local.oakalleyit.com] failed: another network error, wait for 15 seconds
  1936:20140815:182955.155 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored
  1933:20140815:183011.750 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1938:20140815:183023.308 Sending list of active checks to [10.0.0.203] failed: host [Zabbix server] not found
  1936:20140815:183026.823 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: another network error, wait for 15 seconds
  1938:20140815:183027.544 Sending list of active checks to [10.0.0.205] failed: host [Zabbix server] not found
  1938:20140815:183029.555 Sending list of active checks to [107.218.161.189] failed: host [Zabbix server] not found
  1936:20140815:183041.465 Zabbix agent item [memory.used] on host [virt2.local.oakalleyit.com] failed: another network error, wait for 15 seconds
  1936:20140815:183055.469 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored
  1931:20140815:183111.321 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1936:20140815:183125.050 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored
  1931:20140815:183141.454 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1936:20140815:183157.018 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: another network error, wait for 15 seconds
  1936:20140815:183211.022 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored
  1934:20140815:183215.035 Zabbix agent item [memory.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1938:20140815:183224.037 Sending list of active checks to [10.0.0.203] failed: host [Zabbix server] not found
  1938:20140815:183228.660 Sending list of active checks to [10.0.0.205] failed: host [Zabbix server] not found
  1936:20140815:183229.119 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored
  1938:20140815:183230.187 Sending list of active checks to [107.218.161.189] failed: host [Zabbix server] not found
  1933:20140815:183242.009 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1936:20140815:183255.520 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored
  1934:20140815:183311.740 Zabbix agent item [swap.used] on host [virt2.local.oakalleyit.com] failed: first network error, wait for 15 seconds
  1936:20140815:183325.959 resuming Zabbix agent checks on host [virt2.local.oakalleyit.com]: connection restored