Bug Report from www.isc.org:

Name: John J. Jordan
Email: jjjordan@berkeley.edu
Software Version: DHCP Client 4.3.5
OS: ArchLinux
Subject:dhcp client fails with very long lease times


Bug Detail
===========
Greetings,

I'm an ArchLinux user trying to run on Azure (currently unsupported), and here's my latest hurdle.  The Azure dhcp servers appear to give back very long lease times, which resultin isc-dhcp exiting with a failure code:

Jan 06 09:35:32 foobar dhclient[251]: Listening on LPF/eth0/00:0d:3a:f7:77:23
Jan 06 09:35:32 foobar dhclient[251]: Listening on LPF/eth0/00:0d:3a:f7:77:23
Jan 06 09:35:32 foobar dhclient[251]: Sending on   LPF/eth0/00:0d:3a:f7:77:23
Jan 06 09:35:32 foobar dhclient[251]: Sending on   Socket/fallback
Jan 06 09:35:32 foobar dhclient[251]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
Jan 06 09:35:32 foobar dhclient[251]: Sending on   LPF/eth0/00:0d:3a:f7:77:23
Jan 06 09:35:32 foobar dhclient[251]: Sending on   Socket/fallback
Jan 06 09:35:32 foobar dhclient[251]: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
Jan 06 09:35:32 foobar dhclient[251]: DHCPREQUEST on eth0 to 255.255.255.255 port 67
Jan 06 09:35:32 foobar dhclient[251]: DHCPREQUEST on eth0 to 255.255.255.255 port 67
Jan 06 09:35:32 foobar dhclient[251]: DHCPOFFER from 168.63.129.16
Jan 06 09:35:32 foobar dhclient[251]: DHCPOFFER from 168.63.129.16
Jan 06 09:35:32 foobar dhclient[251]: DHCPACK from 168.63.129.16
Jan 06 09:35:32 foobar dhclient[251]: DHCPACK from 168.63.129.16
Jan 06 09:35:32 foobar dhclient[251]: Unable to set up timer: out of range
Jan 06 09:35:32 foobar dhclient[251]: Unable to set up timer: out of range
Jan 06 09:35:32 foobar dhclient[251]: If you think you have received this message due to a bug rather
Jan 06 09:35:32 foobar dhclient[251]: than a configuration issue please read the section on submitting
Jan 06 09:35:32 foobar dhclient[251]: bugs on either our web page at www.isc.org or in the README file
Jan 06 09:35:32 foobar dhclient[251]: before submitting a bug.  These pages explain the proper
Jan 06 09:35:32 foobar dhclient[251]: process and the information we find helpful for debugging..
Jan 06 09:35:32 foobar dhclient[251]: exiting.
Jan 06 09:35:32 foobar dhclient[251]:
Jan 06 09:35:32 foobar dhclient[251]: If you think you have received this message due to a bug rather
Jan 06 09:35:32 foobar dhclient[251]: than a configuration issue please read the section on submitting
Jan 06 09:35:32 foobar dhclient[251]: bugs on either our web page at www.isc.org or in the README file
Jan 06 09:35:32 foobar dhclient[251]: before submitting a bug.  These pages explain the proper
Jan 06 09:35:32 foobar dhclient[251]: process and the information we find helpful for debugging..
Jan 06 09:35:32 foobar dhclient[251]:
Jan 06 09:35:32 foobar dhclient[251]: exiting.
Jan 06 09:35:32 foobar systemd[1]: dhclient@eth0.service: Main process exited, code=exited, status=1/FAILURE
Jan 06 09:35:32 foobar systemd[1]: dhclient@eth0.service: Unit entered failed state.

dhclient does generate a lease before its last gasp:

lease {
  interface "eth0";
  fixed-address 10.0.0.4;
  server-name "RD7CFE9073B790";
  option subnet-mask 255.255.255.0;
  option dhcp-lease-time 4294967295;
  option routers 10.0.0.1;
  option dhcp-message-type 5;
  option dhcp-server-identifier 168.63.129.16;
  option domain-name-servers 168.63.129.16;
  option dhcp-renewal-time 4294967295;
  option unknown-121 0:a:0:0:1:20:a8:3f:81:10:a:0:0:1:20:a9:fe:a9:fe:a:0:0:1;
  option unknown-245 a8:3f:81:10;
  option dhcp-rebinding-time 4294967295;
  option domain-name "qwrbvszjplpefava5oneutk1ue.xx.internal.cloudapp.net";
  renew 1 2153/02/12 16:03:47;
  rebind 1 2153/02/12 16:03:47;
  expire 1 2153/02/12 16:03:47;
}

And as you'll note, dhcp-renewal-time == 0xFFFFFFFF.

This appears to have been reported elsewhere.  I found the same error message reported to Ubuntu: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1189571
But there was no indication that this was sent or merged upstream.  I think they just patched it.  The use case is identical (running on Azure) and the symptoms are identical (-1 lease time).

Please do not hesitate to contact me should you need any further information.

Thanks!
John Jordan

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