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List:       dhcp-client
Subject:    Re: Client fails to get address on Redhat
From:       Neal Horman <neal () wanlink ! com>
Date:       2000-08-13 0:55:47
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	I have AT&T w/Motorola CyberSurfr etc... Try;

interface "eth0" {
    send host-name "c459955-c";
#    send dhcp-client-identifier "c459955-c";
    send dhcp-lease-time 3600;
}

On Sat, 12 Aug 2000, Steve Lane wrote:

> Date: Sat, 12 Aug 2000 14:24:07 -0500
> From: Steve Lane <slane@fmpro.com>
> To: dhcp-client@isc.org
> Subject: Client fails to get address on Redhat
> 
>    *** From dhcp-client -- To unsubscribe, see the end of this message. ***
> 
> 
> Dear list:
> 
> No luck getting DHCP to work with my cable modem so far. I hope someone here
> can help. Here's my setup:
> 
> AtHome cable modem service, with Motorola CyberSurfr cable modem (not the
> newest of this type, apparently).
> Cable modem connected via crossover cable to a hub.
> 3 machines plugged into the hub. Two are macs, connect to AtHome via DHCP
> with no trouble. Trouble is with the third machine, the Linux box:
> 
> Dell Dimension XPS FR400
> 3COM 3c59x 10/100bTX card (Cyclone I think is the name)
> Linux kernel 2.2.12-20
> 
> I know the Ethernet config is all fine, because I can configure the Linux
> box with a static IP from AtHome and it works fine (but I have to steal the
> IP from one of the Macs so this is no help).
> 
> I got to the ISC dhclient because neither dhcpcd nor pump appeared to work,
> and because dhclient seems to let me send a client ID, which AtHome seems to
> require.
> 
> Anyway, here's the configuration for the card (eth0) from  /etc/ifcfg-eth0:
> 
> DEVICE=eth0
> IPADDR=
> NETMASK=255.255.255.0
> ONBOOT=yes
> BOOTPROTO=dhcp
> IPXNETNUM_802_2=""
> IPXPRIMARY_802_2="no"
> IPXACTIVE_802_2="no"
> IPXNETNUM_802_3=""
> IPXPRIMARY_802_3="no"
> IPXACTIVE_802_3="no"
> IPXNETNUM_ETHERII=""
> IPXPRIMARY_ETHERII="no"
> IPXACTIVE_ETHERII="no"
> IPXNETNUM_SNAP=""
> IPXPRIMARY_SNAP="no"
> IPXACTIVE_SNAP="no"
> USERCTL=no
> BROADCAST=
> NETWORK=
> 
> And here's the dhclient.conf:
> 
> interface "eth0" {
> 
> #send dhcp-client-identifier "C459955-C";
> send dhcp-client-identifier 00:10:5a:0a:7e:ac;
> send dhcp-lease-time 86400;
> }
> The "C459955-C" identifier is apparently what AtHome uses -- I have had no
> success uncommenting this line and commenting out the one after it, though.
> 
> With this config, when I start dhclient, I see it send a lot of
> DHCPDISCOVERs, then time out and go to sleep. tcpdump during some of the
> discovers looks like this:
> 
> 13:55:12.467415 eth0 > 0:0:0:0:0:0 sap 10 > 0:10:5a:a:7e:ac sap 45 I
> (s=0,r=36,C) len=324
>     0000 0000 1011 a996 0000 0000 ffff ffff
>     0044 0043 0134 4976 0101 0600 6adf fe07
>     0003 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0010 5a0a 7eac 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000
> 13:55:16.739027 eth0 > 0:0:0:0:0:0 sap 10 > 0:10:5a:a:7e:ac sap 45 I
> (s=0,r=36,C) len=324
>     0000 0000 1011 a996 0000 0000 ffff ffff
>     0044 0043 0134 03fc 0101 0600 76f8 375b
>     0011 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0010 5a0a 7eac 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000
> 13:55:17.529474 eth0 B arp who-has 24.5.230.220 tell 24.5.230.1
> 13:55:19.467421 eth0 > 0:0:0:0:0:0 sap 10 > 0:10:5a:a:7e:ac sap 45 I
> (s=0,r=36,C) len=324
>     0000 0000 1011 a996 0000 0000 ffff ffff
>     0044 0043 0134 496f 0101 0600 6adf fe07
>     000a 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0010 5a0a 7eac 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0000 0000 0000 0000 0000 0000
> 13:55:20.468809 eth0 B arp who-has 24.5.230.220 tell 24.5.230.1
> 13:55:22.591450 eth0 B arp who-has 24.5.230.221 tell 24.5.230.1
> 
> Urg. I understand networking fairly well, but I'm no wizard. Has anyone
> gotten such a setup to work with AtHome? And can anyone see anything obvious
> I'm missing?
> 
> Thanks,
> 
> Steve
> 
> ----------
> Steve Lane
> Project Manager
> Chris Moyer Consulting Inc., Chicago
> 833 W. Chicago Ave. Suite 203
> Chicago, IL 60622
> 312 433-2421 (V)
> 312 850-3930 (F)
> 
> 
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> 

----------
Neal Horman
	"Today, is an opportunity for us all to learn something new."


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