Problems with SNMP discovery of large networks

[NBD]

Hi,

I have issues with SNMP discovery of two class-b networks /16 the problem is that the discovery is very slow, it works but is very slow. I have managed to discover about 400 devices of 1300 and now it seems like it can´t get any further, it seems like the discovery process does not finish until it starts again.It looks like the whole discovery process is linear instead of parallel discovery of multiple hosts at the same time. In the config i start 20 discovery processes but it seems like only one or two is used.

I an running Zabbix 4.4 on Centos 7 , as far as i can see there is no load at all on the server, average NVPS is 1.99

Anyone who have any suggestion or cant point me in the right direction on where to look?

[Atsushi]

How many discovery rules are registered for that class B network?
If there is only one discovery rule, it will take time until the entire class B is checked, so it is possible to divide the discovery rule and increase the number of StartDiscoverers in the Zabbix server settings so that the discovery process can be processed in parallel Please try it.

[NBD]

I only had one rule containing multiple networks. I did as you suggested and divided it up in smaller networks and one network for each subnet and it started working better. Its not a pretty solution and seems like a design flaw in Zabbix, when the only parallel processing of discovery is to have multiple discovery rules.

Thank you very much for the help!!