How to discover all hosts on the whole network?

[W1zard]

Self-discovery goes well and the Action is adding hosts according to what I have set, but the problem is that I only discovered 172.25.0.0-254 host of network and what I want is to go up the other networks, eg :
172.25.1.0, 172.25.5.0 not if I explain well because in the range of only I put 172.25.0.0-254 and has only taken me 30 hosts that are on that network. any idea how to make the entire network ? The final idea is to monitor switches but now I have to find everything.

when i try 172.25.0.0-172.25.255.255 got this error

ERROR: Cannot update discovery rule
Incorrect IP range "172.25.0.0-172.25.255.255".

[Atsushi]

I think you can use IP masks.

https://www.zabbix.com/documentation/2.2/manual/discovery/network_discovery/rule

If you want set IP range is 172.25.0.0-172.25.255.255,
Please try set 172.25.0.0/16.

However, if you specify such a wide range, may be timeout occurs.
I think IP ranges are more split is good.