first network error, wait for 15 seconds

zabbix 服务端和客户端启动失败
报错信息：
Get value from agent failed:cannot connect to [[192.168.121.128]:10050]:[4]Interrupted system call
first network error, wait for 15 seconds
查看日志
#cat /var/log/zabbix/zabbix_server.log

#cat /var/log/zabbix/zabbix_agentd.log

fail (cannot connect to [[192.168.121.128]:10051]: [113] No route to host
first network error, wait for 15 seconds

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