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kind off "ARP" test

 
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menno



Joined: 21 May 2010
Posts: 143

PostPosted: Wed Jun 08, 2016 6:37 am    Post subject: kind off "ARP" test Reply with quote

I like to see a test method that respond to MAC address changes.

we authorized all our phones & tablets via MAC address filter so we know EVERY mac address of our devices in the building

for example we have several mobile phones/tablets running in and out of the building.
It is nice to see if that mobile device ( phone or tablet ) is in the building.
Because you can not ping android or windows mobile phones and we do not know the ip address we still want to see if the device is in the building.

if the mac address is not available ...there is a possibility that this device is not in the building. Thats all we need

if the mac address is available we can test if the hostname is correct via the MAC address.

i hope you will understand my question,.
many thanks in advance
Menno


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KS-Soft



Joined: 03 Apr 2002
Posts: 11916
Location: USA

PostPosted: Thu Jun 09, 2016 11:15 am    Post subject: Reply with quote

Not sure how this can be done.
Inverse ARP requests? Will it work in your network? I think normally routers do not pass ARP traffic so you can get result only if cell phones connected to the same network segment as HostMonitor.

Regards
Alex
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menno



Joined: 21 May 2010
Posts: 143

PostPosted: Sun Jun 12, 2016 3:26 am    Post subject: Reply with quote

Quote:
Not sure how this can be done.
Inverse ARP requests? Will it work in your network? I think normally routers do not pass ARP traffic so you can get result only if cell phones connected to the same network segment as HostMonitor.

Regards
Alex


Hello Alex
Yes all the phones are on the same network as HM. Thats no problem. If i look in the logs from the router i see all ARP request comming true.

Is it still possible ?
m
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KS-Soft



Joined: 03 Apr 2002
Posts: 11916
Location: USA

PostPosted: Mon Jun 13, 2016 9:05 am    Post subject: Reply with quote

Then I think you may setup such check using SNMP Table test method
- host: IP address of your router
- Table OID: 1.3.6.1.2.1.4.22.1.2
- Alert when any item = <MACaddress> (e.g. %71%2A%34%2C%62%3E)

Some routers allow to specify how long entries remain in the ARP cache
(e.g. arp timeout command, CISCO IOS).
E.g. if you setup HostMonitor to perform test every 5 min, you may set arp timeout to 150 sec

Regards
Alex
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