Curious lease to/from Apple DHCP Client

Tue Aug 1 16:27:34 UTC 2006

This is exactly the pattern I observed when I first connected my (then)
brand new MAC to my network; during the next week and using far too much
time I found that the only cure was to switch from an internal tld of
".local" to something else ".home". Apple uses .local for some other
purpose and things go very wrong.

If you do not use .local, I am out of ideas for now.

Didier Benza wrote:
> Hi everybody.
> We are running two ISC Dhcpd (version 3.0.4) configured in a failover 
> mode. The max-lease-time is of 3600 sec and the default-lease-time of 
> 900 sec.
>
> We noticed a curious comportment from several Apple clients, where they 
> always do a DHCP DISCOVER at the end of the lease time. Each time 
> requesting a lease of 90 days. The OFFER/REQUEST/ACK sequence that 
> follows this DISCOVER is correct, the server offers a lease time of 
> 60s... but  90 sec later (not 30s or 60s !!), the client does a DISCOVER 
> again, requesting a lease of 90 days.
>
> The ISC server OFFER another address with a lease of 60 sec, and so on...
>
> Here is an example (a scripted output of a tcpdump) : LT is the Lease 
> Time, each line represents an exchange between the client and the server :
>
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:30:32.000920 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:30:33.006151 with IP 
> Address vis193b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:30:33.008401 with a LT of 0 
> and received a ACK with a LT of 60 at 16:30:40.627665 with IP Address 
> vis193b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:32:03.000778 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:32:04.007340 with IP 
> Address vis174b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:32:04.010728 with a LT of 0 
> and received a ACK with a LT of 60 at 16:32:05.839760 with IP Address 
> vis174b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:33:34.001017 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:33:35.008029 with IP 
> Address vis177b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:33:35.010371 with a LT of 0 
> and received a ACK with a LT of 60 at 16:33:40.330396 with IP Address 
> vis177b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:35:05.000179 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:35:06.007092 with IP 
> Address vis124b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:35:06.008747 with a LT of 0 
> and received a ACK with a LT of 60 at 16:35:07.149920 with IP Address 
> vis124b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:36:36.000091 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:36:36.045972 with IP 
> Address vis201b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:36:37.010422 with a LT of 0 
> and received a ACK with a LT of 60 at 16:36:51.195181 with IP Address 
> vis201b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:38:07.000977 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:38:08.011843 with IP 
> Address vis049b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:38:08.013300 with a LT of 0 
> and received a ACK with a LT of 60 at 16:38:12.271460 with IP Address 
> vis049b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:39:38.001363 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:39:39.006160 with IP 
> Address vis166b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:39:39.008478 with a LT of 0 
> and received a ACK with a LT of 60 at 16:39:45.668114 with IP Address 
> vis166b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:41:09.000244 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:41:09.154725 with IP 
> Address vis176b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:41:10.008638 with a LT of 0 
> and received a ACK with a LT of 60 at 16:41:10.013470 with IP Address 
> vis176b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:42:40.000701 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:42:41.006162 with IP 
> Address vis103b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:42:41.009321 with a LT of 0 
> and received a ACK with a LT of 60 at 16:42:49.791866 with IP Address 
> vis103b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:44:11.000930 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:44:12.006226 with IP 
> Address vis028b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:44:12.009056 with a LT of 0 
> and received a ACK with a LT of 60 at 16:44:20.535706 with IP Address 
> vis028b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:45:42.001526 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:45:43.007352 with IP 
> Address vis066b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:45:43.010073 with a LT of 0 
> and received a ACK with a LT of 60 at 16:45:46.097156 with IP Address 
> vis066b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:47:13.002257 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:47:13.834445 with IP 
> Address vis205b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:47:14.012566 with a LT of 0 
> and received a ACK with a LT of 60 at 16:47:15.370664 with IP Address 
> vis205b.inria.fr
> Host 00:11:24:e3:54:9e did a DISCOVER at 16:48:44.000115 with a LT of 
> 7776000 and received a OFFER with a LT of 60 at 16:48:45.006587 with IP 
> Address vis227b.inria.fr
> Host 00:11:24:e3:54:9e did a REQUEST at 16:48:45.009026 with a LT of 0 
> and received a ACK with a LT of 60 at 16:48:46.447237 with IP Address 
> vis227b.inria.fr
>
> In the mean time another host (an other Mac) do this :
>
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:30:50.618461 with a LT of 
> 7776000 and received a ACK with a LT of 528 at 16:30:52.226134 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:38:53.689811 with a LT of 
> 7776000 and received a ACK with a LT of 3441 at 16:38:54.297431 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:42:03.975267 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:42:05.434904 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a DISCOVER at 16:43:53.425582 with a LT of 
> 7776000 and received a OFFER with a LT of 3600 at 16:43:57.653142 with 
> IP Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:45:47.005356 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:45:47.016028 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:45:48.854430 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:45:50.234421 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:46:19.980490 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:46:23.355683 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:49:07.994421 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:49:09.576512 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:50:16.944071 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:50:20.989054 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:50:56.369235 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:51:05.314977 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:53:26.007620 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:53:38.123179 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:54:57.018200 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:54:58.827988 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:54:58.830238 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:55:03.496919 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:56:49.044889 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:56:50.230835 with IP 
> Address vis145b.inria.fr
> Host 00:0d:93:ec:91:2a did a REQUEST at 16:56:50.232835 with a LT of 
> 7776000 and received a ACK with a LT of 3600 at 16:56:58.183621 with IP 
> Address vis145b.inria.fr
>
> Does anybody have an idea of what's going on in the first case ?
>
> Regards,
>
>   

-- 
Best regards

Sten Carlsen

No improvements come from shouting:

       "MALE BOVINE MANURE!!!" 