Ah yes, very true... I'l revise my suggestion to check the mac address table on the switch that the device is connected to... my guess is a check by ssh or telnet that executes something like:
Show mac-address-table abcd.abcd.abcd And checks for any output, would work. Of course the mac address aging time may be longer than your notification requirements. -----Original Message----- From: Patrick M. Hausen [mailto:[EMAIL PROTECTED] Sent: 20 July 2007 12:23 To: Giles Coochey Cc: Kurt Yoder; Brandino Andreas; Nagios Users mailinglist Subject: Re: [Nagios-users] watching Layer 2 device Hello! > Check the ARP table on a host that communicates with this layer 2 > device. ARP is to match IP addresses to layer 2 addresses. IP addresses are layer 3. No IP, no ARP. Sorry. If the layer 2 device in question is a bridge, you could watch if it emits BPDU frames regularly and raise an alarm if it doesn't for a defined period of time. HTH, Patrick M. Hausen Leiter Netzwerke und Sicherheit -- punkt.de GmbH * Vorholzstr. 25 * 76137 Karlsruhe Tel. 0721 9109 0 * Fax 0721 9109 100 [EMAIL PROTECTED] http://www.punkt.de Gf: Jürgen Egeling AG Mannheim 108285 ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Nagios-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
