Re: DHCP lease and dhclient.eth0.leases.

On April 8 2007 13:20, Greg Folkert wrote:
On Sun, 2007-04-08 at 13:06 -0400, Ed Jabbour wrote:
/var/lib/dhcp3/dhclient.eth0.leases has dates in it that do not
seem to relate to anything. It has two entries. one stating that
the DHCP lease expired two days ago, and another that states it
will expire in 2038:

renew 5 2007/4/6 17:38:58;
  rebind 5 2007/4/6 17:38:58;
  expire 5 2007/4/6 17:38:58;

  renew 2 2038/1/19 03:14:07;
  rebind 2 2038/1/19 03:14:07;
  expire 2 2038/1/19 03:14:07;

First off, are you having any problem?

OK, I'll try to pretend I understand this stuff.

I intermittently lose connection and have to unplug/replug the modem,
which as I understand it, gets me a new lease. I suspected that the
Netgear router was failing to properly negotiate a new lease on its own
when one came down from Comcast. This was mentioned on Netgear's site,
and following their recommendation, I upgraded the firmware. While
trying to investigate the lease, I was led to the above file with the
funny lease times. The router itself shows that the lease was given 4
days ago and expires in 3 days plus some odd. The difference makes me
wonder if there's a software problem someplace.

Second, where are you getting your DHCP ack and reply from (Comcast,
a router or a real DHCP server on you LAN?

The router is a client vis-a-vis Comcast and a server vis-a-vis the LAN.
So, I get the lease from the router which gets it from Comcast.

Thirdly, is that your whole leases file?

No. dhclient.eth0.leases has two entries, each of which has more info.
They are identical but for the lines cited above. I don't know if it's
supposed to have only one entry.

[snip]

Now, if you are getting you DHCP info from a router, well that is a
different issue. Does that Router support uPNP? If it does and you
have zeroconf and the avahi stuff installed, that might explain it.

Ahh, the wonders of Google -- Universal Plug and Play? Yes, it does and
it is enabled. I don't have zeroconf but do have the avahi daemon.

There are many numerous ways of misconfiguration for "privately
controlled" DHCPDs. I really don't want to go into them at length
until we know it is the problem... which I'll hope it isn't.

I hope it isn't, too.

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