Saturday, April 01, 2023

Re: Unable to receive dhcplease from ISP

On 4/1/23 19:57, Bill A wrote:
> Hi all,
>
> I ran into this issue today when I decided to do some maintenance on
> my home network. My laptop runs OpenBSD 7.2. I attempted to get a
> dhcplease from Spectrum Internet with a direct connection to my em0
> ethernet interface. I got no response. I'm having the same problem
> with another computer that I wanted to use as my firewall (also
> running OpenBSD, same ver).
>
> There is no dhcpleased.conf on my laptop, as I didn't see how any
> defaults needed to change. I also haven't had any recent issues
> getting a lease on it in other situations (yet).
>
> Cabling is good. A different (non-OpenBSD) firewall normally sits on
> this interface, and after I put it back, everything was working as
> normal. I'm happy to provide any additional information as
> requested.
>
> I tried this several times, cleared and shutdown the iwm0 interface,
> cleared the em0 interface, etc, this is output from the last time.

I can replicate that with my ISP if I follow your steps.
With my service, if I change the MAC address of the machine attached to
my cable modem, I have to power cycle the cable modem to get a new
DHCP lease.

Not saying that is your problem, but you never indicated you power
cycled the modem...which I have found critical for the last 20+ years.

Nick.

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