--- Chris Kuethe <[EMAIL PROTECTED]> wrote:
> I've seen cases where you can only have one client ethernet address on
> your cable modem, and you need to reset everything and give your old
> mac address a chance to time out. you might want to:
> a) change the external address of your openbsd machine to that of your
> old cheapo router, or
> b) power off your cable modem for half an hour and retry, or
> c) call tech support and get them to reset your cable modem.
As stated I've demonstrated that the modem is happy to work with either the
cheapo router or directly with my desktop, and I verified that it sees them
with separate hardware addresses. So it's not hung up on one in particular.
I've brought the modem down for a few minutes, but I could give it a longer
test.
--- David Higgs <[EMAIL PROTECTED]> wrote:
> Firstly, post something that might help someone troubleshoot your
> problems. Something like a dmesg and any errors that dhclient is
> producing.
Yeah, I wasn't very specific about that, was I? When I watch it try to grab
an address as it boots, it simply tries DHCPREQUEST for a bit (asking for
the address it had when it was plugged into the cheapo router), then
switches to DHCPDISCOVER. After a bunch of those, it says "No DHCPOFFERS
received.", and sets itself up with the last address it had from the cheapo
router.
I've also done "sh /etc/netstart ep1" after boot, with the same effect. The
very last time I tried it, there was one difference I hadn't seen before:
after the first DHCPREQUEST, it received a DHCPNAK from an address that
appears to be upstream in the ISP's framework. Still no response to the
DHCPDISCOVERs, though.
dmesg doesn't show anything interesting.
> Disable everything until you can get dhclient to work. Are you
> blocking dhcp packets with pf? Is your local dynamic DNS service
> screwing with your upstream DHCP?
This setup works just fine when I insert the cheapo router between the
modem and the OBSD router, so pf isn't doing any funny-business. There's
some difference between the router's DHCP and the modem's DHCP that I can't
figure out, and that my desktop machine doesn't notice.
> Maybe try unplugging your cable modem for a bit, sometimes they get
> picky about how many MAC addresses they'll give IPs to.
Alright, I'll unplug it overnight and we'll see what happens in the
morning.
Thanks for the responses.
David Murphy
PS: another piece of info I left out is that my modem is a Motorola
Surfboard SB5120, and my cable ISP is Charter.
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