Re: dhclient changes IP address

[Rainer Dorsch <ml@bokomoko.de>]

Hi Bob,

my fritz.box is a DSL router from AVM, which unfortunately does not give me 
access to syslog.

What I noticed is that 192.168.178.87 shows up without MAC address in the list 
of network devices of the fritz.box 

I think I will try first to get support from AVM on that topic. If that is not 
successful, I will look in more detail into the tcpdumps (although since I 
have to take that on the client side, that might be difficult during the startup 
phase).

Thanks,
Rainer

On Friday 20 June 2014 13:11:45 Bob Proulx wrote:
> Rainer Dorsch wrote:
> > I have a system which comes up with one IP address 192.168.178.87 via
> > dhclient, then after one day it gets eventually a different address
> 
> > 192.168.178.88 from my fritz.box, which runs the dhcp server:
> On your fritz.box what does the dhcpd log to the syslog?
> 
>   grep dhcpd /var/log/syslog
> 
> And if you need to go back futher than a day:
> 
>   zgrep dhcpd /var/log/syslog* | less
> 
> Also very useful for debugging is the dhcpdump utility.
> 
>   $ apt-cache show dhcpdump
> 
>   Description-en: Parse DHCP packets from tcpdump
>    This package provides a tool for visualization of DHCP packets as
>    recorded and output by tcpdump to analyze DHCP server responses.
> 
> Bob

-- 
Rainer Dorsch
http://bokomoko.de/