Zabbix does not see nodes after changing the server IP address, where to look?

Question

Zabbix

Changed the subnet on the network.
Was 192.х.х.х
Became 10.х.х.х
Nodes are available from the shell, nodes are not available in the Zabbix interface.
Plz tell me where to look?

Answer 1

Server restarted, agents on clients restarted...

Answer 2

In the routes on the zabbix server, for example, maybe there are old ones somewhere. In zabbix_get on it, and tcpdump all over the network path. In the Server parameters on the Zabbix agents and in their own firewalls, if the server does not have a new Zabbix IP, the agent will not respond. Maybe somewhere else, not enough data.