lease renewal activity

Fri Mar 30 13:23:31 UTC 2012

Hello,
        I would guess it is not a strictly DHCP issue rather that your
having NIC issues or connectivity problems. The wi-fi access point is where
I would start. Are you see this at specific times on all machines or only
this one? Look at the log for the wi-fi access point and you should see all
requests. If the log in the wi-fi has more than that machine its a
connectivity issue. If it is only that machine you have a bad nic. OS on
the laptop windows= check the Event Viewer under manage>Event logs>System &
manage>Device Manager...look for conflicts. OS on the laptop linux= do a
dhclient on ethX while also having tail -F /var/log/messages. This should
point where the issue is to start trouble shooting. Any time a wireless
devices has a bad connection with weak signal strength it will try to
reconnect and demand a new address. You may want to consider an antenna for
the wi-fi access point to extend the range or if the nic is bad replace it.

My guess is depending on the age of the laptop is not connecting at a good
enough signal strength for the the nic. If it is not hardware than you have
a very bad issue with the dhcpd.conf file which is probably a TTL on the
leases.

Regards,
Edward DeLargy

On Thu, Mar 29, 2012 at 12:02 PM, Jamie Savage <jsavage at yorku.ca> wrote:

> Hi,
>      I'm hoping someone can answer this question ('cause I don't have an
> explanation).   I turned on a laptop working wirelessly and monitored the
> DHCP activity below......we have 10 minute leases.
>
> Discover, Offer, Request Ack....life is good.  Subsequent requests at the
> 5 minute half-life.......again...all is well......until 10:22 where the
> requests are no longer 5 minutes apart and then a discover is initiated at
> 10.24 and then the 5 minute half-life requests start again.
>
> This laptop was just sitting there....I didn't touch it so I have no
> explanation of what happened beginning at 10:22 and why a discover was sent
> out again.
>
> .........any suggestions are greatly
> appreciated........thx...............J
>
>
> Mar 29 09:59:53 airmarshal07.ac.yorku.ca dhcpd: DHCPDISCOVER from
> 00:1f:3a:43:df:a1 via eth1
> Mar 29 09:59:54 airmarshal07.ac.yorku.ca dhcpd: DHCPOFFER on
> 130.63.198.152 to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 09:59:54 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 (130.63.198.1) from 00:1f:3a:43:df:a1 (york-daf0b4cf0b)
> via eth1
> Mar 29 09:59:54 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:04:53 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:04:53 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:09:53 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:09:53 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:14:53 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:14:53 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:19:53 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:19:53 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:34 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:34 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:37 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:37 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:44 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:44 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:54 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:54 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:22:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:23:04 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:23:04 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:23:09 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:23:09 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:14 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:14 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:18 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:18 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:26 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:26 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:46 airmarshal07.ac.yorku.ca dhcpd: DHCPDISCOVER from
> 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:46 airmarshal07.ac.yorku.ca dhcpd: DHCPOFFER on
> 130.63.198.152 to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:46 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 (130.63.198.1) from 00:1f:3a:43:df:a1 (york-daf0b4cf0b)
> via eth1
> Mar 29 10:24:46 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:24:51 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 (130.63.198.1) from 00:1f:3a:43:df:a1 (york-daf0b4cf0b)
> via eth1
> Mar 29 10:24:51 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:29:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:29:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:34:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:34:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:39:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:39:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:44:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:44:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:49:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:49:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:54:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:54:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:59:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 10:59:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:04:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:04:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:09:59 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:09:59 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:15:00 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:15:00 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:20:00 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:20:00 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:25:00 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:25:00 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:30:00 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:30:00 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:35:00 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:35:00 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:40:00 airmarshal07.ac.yorku.ca dhcpd: DHCPREQUEST for
> 130.63.198.152 from 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
> Mar 29 11:40:00 airmarshal07.ac.yorku.ca dhcpd: DHCPACK on 130.63.198.152to 00:1f:3a:43:df:a1 (york-daf0b4cf0b) via eth1
>
> *Jamie Savage  **|**  Senior Communications Technician  **|**  University
> Information Technology*
>
> 010 Steacie Science Building  |  York University  |  4700 Keele St. ,
>  Toronto ON  M3J 1P3 Canada
>
> T: 416.736.2100 x22605  |  F: 416.736.5830  |  jsavage at yorku.ca  |  <http://www.yorku.ca/>
> *www.yorku.ca* <http://www.yorku.ca/>
> *
> *<http://helpdesk.apps01.yorku.ca/2009/11/november-20-2009-new-fraudulent-email-do-not-respond/>
> *York UIT will NEVER send unsolicited requests for passwords or other
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>
>
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