DHCPCD Problems with Cox's new network

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Author: John Kloian III
Date:  
Subject: DHCPCD Problems with Cox's new network
Pump does not allow cloning of the MAC. Also I'm not convinced that the
form of the MAC is as you state (based on the logs), however I haven't had
a chance to read
the RFC today.


On Tue, 29 Jan 2002, Steve Ellis wrote:

>OK, sounds like my problem. How do we clone the IP address Cox sniffed?
>I'm using dhcpcd. I assume I'm supposed to use the -I <MAC address> option.
>Is the format of the <MAC address> xx:xx:xx:xx:xx:xx?? It's not documented
>on the MAN page for dhcpcd.
>
>Not sure if pump allows you to clone a MAC address.
>
>Steve
>
>-----Original Message-----
>From:
>[mailto:plug-discuss-admin@lists.plug.phoenix.az.us]On Behalf Of John
>Kloian III
>Sent: Tuesday, January 29, 2002 9:40 AM
>To:
>Subject: RE: DHCPCD Problems with Cox's new network
>
>
>I think maybe I can verify that. I did the conversion with my windows
>box, which in restrospect was a bad idea. since Then i have not been able
>to get my firewall to grab an IP. I can put it in statically and pass
>traffic. When I use pump and watch the logs this is what I see right
>before a timeout:
>
>xid: 0x63aabbdf4a rejected <-> 0x64aabbddcf
>
>My suspicion is that this is their dhcp server rejecting my request on
>what I can only assume is the MAC address of my NIC. although I cannot
>find any decent documentation.
>
>
>On 28 Jan 2002, Craig White wrote:
>
>>On Mon, 2002-01-28 at 10:32, Jeffrey Pyne wrote:
>>> I've been having trouble, as well. I thought I had it all figured out,
>but
>>> apparently not. I did spend almost 2 hours on hold Saturday morning
>>> (listening to Tori Amos or Enya or whomever-- I requested AT LEAST two
>songs
>>> for the hold music, and the tech support guy replied that many other
>people
>>> had requested the same thing).
>>>
>>> Anyway, I found something interesting: I had been having trouble getting
>a
>>> DHCP lease for the past week. Sometimes I would not get a DHCP_ACK from
>>> their server. Other times I would get one and I would get my old @Home
>IP
>>> address, but then I wouldn't be able to ping my default gateway or
>connect
>>> to anything on the Internet. When I finally spoke to someone Saturday, I
>>> told him that I was getting an IP address of 24.x.y.z, but that I
>couldn't
>>> connect to anything on the Internet. He said, "Hmmmm, that's an @Home
>>> address; you should be getting an IP address that starts with 68."
>>> Interesting. He wanted me to look at my "Workgroup" setting, so I
>quickly
>>> connected my Win98 box to my cable modem and reconfigured it and
>rebooted.
>>> He had me change the Workgroup to "@COX.NET" and reboot. But while I was
>>> futzing around with this, he said a supervisor had just told him that
>their
>>> "provisioning server" was down and that I would not be able to get an IP
>>> address from DHCP until it was back up (oh, and there was no E.T.A.).
>After
>>> I expressed my displeasure and hung up, I tried rebooting the Win98 box
>just
>>> for fun. When I did, I immediately got an IP address and could connect
>to
>>> resources on the Internet. Bizarre. I connected my firewall back up and
>>> ran 'dhclient ne0' and I got my old IP address again (even after deleting
>>> /var/lib/dhcp.leases, which is an OpenBSD thing)). I tried manually
>>> assigning the values I received on my Windows box to my firewall, and
>then I
>>> could connect. So are they using some DHCP server that only hands out IP
>>> addresses for computers in the same "Workgroup?" If so, what about Macs
>>> (which they support)? I'm confused....
>>>
>>> Also, a guy at work said that he was told this weekend that the old
>LANCity
>>> modems don't work with the new network (or rather, they work, but only
>>> intermittently). (And indeed, http://status.cox.net/view.asp shows that
>>> this is an issue.) My co-worker is trading in his modem at a Cox office
>>> today. I have a LANCity modem, too. I think I'll trade it in just for
>the
>>> hell of it. What kind of modem do you have?
>>>
>>> ~Frustrated in Phoenix
>>----------
>>I thought that someone mentioned that the new cox setup changes from a
>>hostname authentication to a mac address authentication to get dhcp
>>service. This would suggest that in the conversion process, the first
>>assignment with your cxXXXXXXX-x hostname captured the mac address of
>>your network interface and locked it down. Thus switching to another NIC
>>(computer/router device) would mean that it can't capture an ip address
>>unless you call customer support and they release it.
>>
>>If this is true, and I haven't verified it, this would make it a bad
>>idea to use a windows computer to get the ip address from the dhcp
>>server and then switching it out for a linux box.
>>
>>Craig
>>
>>________________________________________________
>>See http://PLUG.phoenix.az.us/navigator-mail.shtml if your mail doesn't
>post to the list quickly and you use Netscape to write mail.
>>
>>PLUG-discuss mailing list -
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>>
>
>/***************************************************************************
>*/
>/
>/
>/  John Kloian III                                    VP Network Operations
>/
>/  Opnix, Inc.                                             http://opnix.com
>/
>/
>/
>/                     .Innovating Internet Intelligence.
>/
>/
>/
>/***************************************************************************
>*/

>
>________________________________________________
>See http://PLUG.phoenix.az.us/navigator-mail.shtml if your mail doesn't post
>to the list quickly and you use Netscape to write mail.
>
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>http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
>
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>
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/****************************************************************************/
/                                                                            /
/  John Kloian III                                    VP Network Operations  /
/  Opnix, Inc.                                             http://opnix.com  /
/                                                                            /
/                     .Innovating Internet Intelligence.                     /
/                                                                            /
/****************************************************************************/