IP Address Problems

[Michael J. Lynch]

Oops...sorry.  Mistook you for OP.  I do have DHCP server up and
running on Hoary and haven't seen any problems.  That being said, I
did switch to dhcpd (IIRC, dhcp package).  IIRC, I did this because
I couldn't get TFTP/netboot to work correctly with the installed dhcpd 
server.  I may be remembering the reasoning incorrectly though.

One thing I did check on my clients just for yucks was 
/var/lib/dhcp/dhclient.leases.  They are empty.  Probably doesn't mean
anything, just thought I'd mention it since my setup seems to be
working.


Roger Haxton wrote:
> On Wednesday 11 January 2006 10:47, Michael J. Lynch wrote:
> 
>>I don't think it's a dhcpcd vs. dhclient3 issue.  I'm using both 5.04
>>(Hoary) and 5.10 (Breezy) here with DHCP and neither have any sort of
>>issue like the one seen.  As a matter of fact, the machines do get the
>>same IP address assigned each time I reboot them.
>>
>>I really suspect a problem with configuration or something on your end.
>>That being said, it's strange that the problem is occurring on two
>>different machines.
>>
>>Just out of curiosity, how do you know how long the server lease times
>>are?  One other note, it's the server end that enforces the lease times
>>not the client (your) end.  When your machine initializes its network
>>via dhcp, it sends a DHCPDISCOVER request to the server.  When the
>>server receives it, the MAC address is checked against existing leases
>>and if one exists, the IP address from that lease is assigned.  You
>>*can* be assigned a different IP address if the IP address you *were*
>>assigned got re-assigned between the time you disconnected and when you
>>reconnect.
> 
> 
> I know how long the lease times are because that's what I set them to.  I'm 
> the engineer who built the network.  I know how DHCP works.  What I'm saying 
> is that I'm seeing a different behaviour from my Ubuntu box from any other 
> box I've plugged into the network.  I DO NOT have this problem with any of 
> the SuSE boxes I've plugged in in the past.  Just Ubuntu. 
> 
> 
>>You mentioned that your ISP is complaining because they are running out
>>of IP addresses to assign.  This would suggest that their DHCP server
>>is, in fact, assigning you a different IP address because the one you
>>had previously got re-assigned.
>>
> 
> 
> That wasn't me, that was the OP.  
> 
> 
>>Take a look at /var/log/syslog.  There should be some entries tagged
>>*dhclient*.  These should show the request and ack sequence exchange
>>with the server.  It should also show the IP address assigned by
>>the server and the renewal time (in seconds).  Post the info if you
>>can.
>>
> 
> 
> That I haven't looked at.  I'll look at the logs and see what they are 
> reporting.  This is more of an annoyance than anything else.  It's not 
> anything crucial on my end at the moment.  I just saw the OP was having 
> issues similar to what I was seeing, so I thought I'd post my problems as 
> well.
> 
> 
>>--
>>Michael J. Lynch
>>
>>What if the hokey pokey IS what it's all about -- author unknown
> 
> 


-- 
Michael J. Lynch

What if the hokey pokey IS what it's all about -- author unknown