[NTLUG:Discuss] Linux, DSL, and Qwest?

[Steve Egbert]

If the Ethertype is 0800, then you're probably using a 
> Originally, I'd thought Qwest used PPPoE, so I downloaded rp-pppoe,
> installed it, and configured it for their network.  It was 
> never able to
> establish the connection to the ISP---timed out waiting for a PPP
> initialization message.  (I don't have the logs in front of 
> me, so I don't
> remember the exact problem.)
> 
> However, when I tried it with the Win95 box, I didn't need to set up
> PPPoE.  It was just plug it in, turn on DHCP, and go.
> 

It would help to know if you are using a DSL-bridge modem or DSL-router
modem.

Based on your email, sounds like a DSL bridge modem but I cannot be sure.

Using the modem, use "tcpdump" on "eth0" to determine whether it is PPPoE or
IP.

The modem is responsible for "bridging" PPPoE packet as-is OR translating
PPPoATM into Ethernet IP.

> So, I tried that with the Redhat machine.  I used their 
> netcfg utility to
> configure eth1 to come up at boot time and use DHCP for address
> resolution.  (Eth0 is the internal network, and it has a static IP,
> 129.168.0.1.)  It doesn't appear that an /etc/pump.conf is 
> necessary, so I
> didn't supply one.
> 
> Pump never returns.  After about 30 seconds, though, ifconfig 
> shows that it
> has assigned an IP address to eth1; it was always 10.0.0.2 
> when I tried
> it.  I set up the routing tables manually to read the following:
> 

Only in RedHat 6.2, there is a severe problem with "pump".  I recommend
going back to the ISC's dhcpcd instead or do a RedHat upgrade.

> Destination     Gateway         Netmask             Interface
> 192.168.0.1     *               255.255.255.255     eth0
> 192.168.0.0     *               255.255.255.0       eth0
> 10.0.0.0        *               255.0.0.0           eth1
> 127.0.0.0       *               255.0.0.0           lo
> default         10.0.0.1        0.0.0.0             eth1
> 
> (The gateway IP was supplied by Qwest's tech support, for what that's
> worth.)
> 

Looks like you are now using a DSL router which already performed NAT.  You
will need to turn on RIP or assign static routes so that packets can reach
the subnet 10 from the DSL router.

> I tried to ping 10.0.0.1, by IP address, and it printed the 
> error message
> 
> >From 10.0.0.2: Destination Host Unreachable
> 
> I control-C'd out of ping and went to try some other things, when the
> kernel started dumping errors to the console:
> 
> eth1: 21140 transmit timed out, status fe67c057, SIA 00000000 00000200
> 00000000 c40ffec8, resetting...

There is a cabling fault (possibly a crossover instead of a straight-thru or
vice-versa).

Hope this helps.


Steve Egbert
http://www.egbert.net
mailto:steve at egbert.net