Zabbix items often display a "Can not read the data from the SSH server" on items using "ssh agent" and the status to "Not supported". Not long after the "Not supported" and then to "supported". Thats condition occurs many times.

There is the log from the zabbix server:
9803:20130319:112028.374 item [172.17.0.21:ssh.run[XLU,172.17.0.21,22]] became supported
9803:20130319:112028.374 item [172.17.0.21:ssh.run[TSS,172.17.0.21,22]] became supported
9803:20130319:112028.374 item [172.17.0.21:ssh.run[ISU,172.17.0.21,22]] became supported
9805:20130319:112038.384 item [172.17.0.111:ssh.run[ISU,172.17.0.111,22]] became supported
9805:20130319:112038.384 item [172.17.0.111:ssh.run[XLU,172.17.0.111,22]] became supported
9804:20130319:112043.409 item [172.17.0.111:ssh.run[ISS,172.17.0.111,22]] became supported
9804:20130319:112043.409 item [172.17.0.111:ssh.run[XLS,172.17.0.111,22]] became supported

thanks for respons