How to use ipdiscover in a class b subnet

Hello everybody,

I installed a new server based on debian 8.6 with:

OCSInventory-Server
OCSInventory-ocsreports
UnixAgent

from https://github.com/OCSInventory-NG.

The Server works fine, but view parts of our network are based like 128.1.0.0/16 (class B) and if I scan manually with:

ocsinventory-agent --debug --backend-collect-timeout=86400 --logfile=/var/log/ocsinventory-agent-debug.log

the scan takes over two hours to be finished:

[Tue Sep 27 12:24:10 2016][debug] Scanning the 128.1.0.0 network
[Tue Sep 27 14:28:42 2016][debug] Running Ocsinventory::Agent::Backend::OS::Generic

We are interests to scan view parts of our network frequently, but with less run duration.

Now I want to set subnets in ocsinventory like:

128.1.1.x
128.1.2.x

to scan only via ipdiscover and to forbid to scan the full class B network. Is this possible? Only if the scan is finished the results would be send to the server.

Alternatively I would scan my network via nmap and generate a xml-file to store the data like:

<REQUEST>
  <CONTENT>
    <ACCOUNTINFO>
      <KEYNAME>TAG</KEYNAME>
      <KEYVALUE>OCSNG-Server</KEYVALUE>
    </ACCOUNTINFO>
    <IPDISCOVER>
      <H>
        <I>128.1.1.1</I>
        <M>d0:aa:aa:aa:aa:aa</M>
        <N>name</N>
      </H>
    </IPDISCOVER>
  </CONTENT>
  <DEVICEID>ocsng-2016-09-26-15-22-07</DEVICEID>
  <QUERY>INVENTORY</QUERY>
</REQUEST>

But how can I send the data under debian or windows client to the server?


Additional informations:

ocsinventory-agent --version
Ocsinventory unified agent for UNIX, Linux and MacOSX (2.2)

server version: the new one 2.2.1 - but I can't find any informaion on running system (log, web frontend)

Starting OCS Inventory NG Management server setup on 2016-09-21-11-29-28

Software

PHP Version :

5.6.24-0+deb8u1 (apache2handler)

Web Server :

Apache/2.4.10 (Debian)

Database Server :

(Debian) version 5.5.52-0+deb8u1