[TriLUG] DHCP renewal problems

[Tim Jowers]

Stab in the dark but maybe the MAC addresses are the same and causing a
problem with DHCP? I'm not sure what cards do when none is entered as some
allow you to enter a MAC address. I'm seeing something related but different
on my home network. I had one machine with a fixed IP: 192.168.1.6 and then
I added a 4th machine and the router gave it 192.168.1.6. Conflict. Well, I
shut down the second 192.168.1.6  machine but now when I ssh to the original
192.168.1.6 machine then it takes like 2 minutes for the password prompt to
come up. I'll try to reboot all router and machines once I get a chance to
mess with it.

Tim


On Jan 21, 2008 10:35 PM, Christopher L Merrill <chris at webperformance.com>
wrote:

> Alan Porter wrote:
> >> Any ideas?  I don't even know where to start googling...
> >
> >
> > Try setting the address manually:
> >
> >    ifconfig eth0 192.168.1.103 netmask 255.255.255.0 up
>
> Any invocation of "ifconfig" results in a non-responsive terminal (i.e. it
> hangs).
>
> > And then see if you can see the DHCP server:
> >
> >    ping 192.168.1.1
> >
> > You may need to set a route:
> >
> >    route add default dev eth0
> >
> > See if there are any firewall rules:
> >
> >    iptables -L -n -v
>
> iptables is not installed
>
> > Post your DHCP client's config file here.  Some might have clauses
> > about "request" and "require" that can cause the client to refuse
> > an offered address.
>
> Would that be /etc/dhcpclient.conf or something similar?  There is
> no /etc/dhcp* on the machines in question.  I assume that means
> it is using all default settings.
>
> > Post your DHCP server's config file here.  There might be some
> > special entry for the server that works, and might be missing for
> > the one that doesn't.
>
> Here it is.
>
> #       $OpenBSD: dhcpd.conf,v 1.1 1998/08/19 04:25:45 form Exp $
> #
> # DHCP server options.
> # See dhcpd.conf(5) and dhcpd(8) for more information.
> #
>
> # Network:              192.168.1.0/255.255.255.0
> # Domain name:          my.domain
> # Name servers:         192.168.1.3 and 192.168.1.5
> # Default router:       192.168.1.1
> # Addresses:            192.168.1.32 - 192.168.1.127
> #
> shared-network LOCAL-NET {
> #       option  domain-name "my.domain";
> #       option  domain-name-servers 24.25.5.60, 24.25.5.61;
>        option  domain-name-servers 24.25.4.108, 24.25.4.109;
>
>        subnet 192.168.1.0 netmask 255.255.255.0 {
>                option routers 192.168.1.1;
> #               option static-routes 192.168.2.0 255.255.255.0
> 192.168.1.101;
>                range 192.168.1.200 192.168.1.249;
>        }
>        subnet 24.172.127.52 netmask 255.255.255.252 {
>        }
> }
>
>
> TIA,
> Chris
>
> --
> ------------------------------------------------------------------------ -
> Chris Merrill                           |  Web Performance, Inc.
> chris at webperformance.com                |  http://webperformance.com
> 919-433-1762                            |  919-845-7601
>
> Website Load Testing and Stress Testing Software & Services
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