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/vse012070mrt/direct/01/ ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net 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
Re: [Nagios-users] watching Layer 2 device
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/vse012070mrt/direct/01/ ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net 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
Re: [Nagios-users] watching Layer 2 device
Check the ARP table on a host that communicates with this layer 2 device. Best regards Giles Coochey Technical Department Sapphire Networks -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kurt Yoder Sent: 19 July 2007 16:03 To: Brandino Andreas Cc: Nagios Users mailinglist Subject: Re: [Nagios-users] watching Layer 2 device On Jul 18, 2007, at 2:29 AM, Brandino Andreas wrote: > Hi list, > > i am trying to watch a layer 2 device. It has no ip or snmp > capabilites. > > Except of watching the ethernet port on the switch is any other way to > check if is up? Is the device visible from the network in any way at all? Or is it possible to configure the device to have an ip address? If not, you will need to get creative. Maybe create some kind of direct serial or usb connection between the nagios monitoring server and the monitored hardware. Then write a custom plugin to check the connection. -Kurt - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net 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 - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net 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
Re: [Nagios-users] watching Layer 2 device
On Jul 18, 2007, at 2:29 AM, Brandino Andreas wrote: > Hi list, > > i am trying to watch a layer 2 device. It has no ip or snmp > capabilites. > > Except of watching the ethernet port on the switch is any other way to > check if is up? Is the device visible from the network in any way at all? Or is it possible to configure the device to have an ip address? If not, you will need to get creative. Maybe create some kind of direct serial or usb connection between the nagios monitoring server and the monitored hardware. Then write a custom plugin to check the connection. -Kurt - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net 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
[Nagios-users] watching Layer 2 device
Hi list, i am trying to watch a layer 2 device. It has no ip or snmp capabilites. Except of watching the ethernet port on the switch is any other way to check if is up? Regards <> --- --- --- <> Brandino Andreas [EMAIL PROTECTED] <> --- --- --- <> - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Nagios-users mailing list Nagios-users@lists.sourceforge.net 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
