check_dhcp question...

[Hari Sekhon]

yes on that truly different machines note, I have noted than isc's dhcpd 
doesn't give a dhcpoffer back to it's own interface, hence I'm running 
my dhcp check from a different server to the dhcp server.

also make sure the dhcprequest is going out of the right interface (my 
defaulted to eth0 but this was not plugged it, I was using eth1)

other than that, all the basic stuff, check iptables, perhaps try 
different versions of the plugin in case there is a bug, make sure your 
dhcp server is on the same subnet or you at least have a dhcp relay on 
your subnet etc etc.

-h

Hari Sekhon



Marc Powell wrote:
>   
>> -----Original Message-----
>> From: Lacayo, Luis F [mailto:lflacayo at cps.k12.il.us]
>> Sent: Wednesday, June 27, 2007 3:07 PM
>> To: Marc Powell; Nagios-users at lists.sourceforge.net
>> Subject: RE: [Nagios-users] check_dhcp question...
>>
>> Here is the output of the verbose.
>>
>> [root at co-log01 libexec]#  ./check_dhcp -v -s 10.129.177.16
>> Requested server address: 10.129.177.16
>> DHCP socket: 3
>> Hardware address: 001438bbfc21
>> DHCPDISCOVER to 255.255.255.255 port 67
>> DHCPDISCOVER XID: 756149105 (0x2D11EB71)
>> DHCDISCOVER ciaddr:  0.0.0.0
>> DHCDISCOVER yiaddr:  0.0.0.0
>> DHCDISCOVER siaddr:  0.0.0.0
>> DHCDISCOVER giaddr:  0.0.0.0
>> send_dhcp_packet result: 548
>>
>> No (more) data received
>> Result=ERROR
>> Total responses seen on the wire: 0
>> Valid responses for this machine: 0
>> DHCP problem: No DHCPOFFERs were received.
>>     
>
> I assume that this machine is on the same broadcast network as your DHCP
> server and they are truly different machines. Are you running dhclient
> or iptables/ipchains on this machine? Anything that would interfere with
> the reception of the dhcp packet? It might be necessary to use tcpdump
> to verify that the machine is actually receiving a response. Right now
> it would appear that it really isn't.
>
> How were the plugins installed and what version? If you're not running
> the latest version of the plugins you should test with that. This thread
> might be useful --
>
> http://sourceforge.net/tracker/index.php?func=detail&aid=1090549&group_i
> d=29880&atid=397597
>
> --
> Marc
>
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