HELP! Hooking up Road Runner broke my network

HELP! Hooking up Road Runner broke my network

Post by Jim Grunewal » Sun, 09 Jul 2000 04:00:00



I finally got Road Runner up on my Linux box (and my Win98 box
separately). Prior to starting on Road Runner, I had my Win98 box and my
Linux box talking.
One of the things that I did to get Road Runner to work is switch the
cables on the two NICS in the Linux box (the cable to the hub was
switched with the cable to the cable modem). Apparently, Linux (and/or
I) was confused about which NIC was eth0 and eth1.
Without changing anything on the Win98 box, I plugged the cable from the
hub back into the Win98 NIC and voila... they wouldn't talk.
Does anybody have any suggestions?
Thanks for your help,
Jim

 
 
 

HELP! Hooking up Road Runner broke my network

Post by Rob Weis » Tue, 11 Jul 2000 04:00:00


The easiest way to figure out which interface is which is to shutdown eth1
and look at the lights on the cards....I write "eth1" and "eth0" on the
cards so I can easily determine what is what.

Second.....are you sure that both cables are straight thru? Make sure that
the cables are not x-overs!

What does your network look like? Road-runner to eth0 on the linux and
eth1 on the linux to the switch/hub and the win98 eth to the switch/hub?
Make sure you can ping all interfaces from every box. That is first. Then
make sure that ipchains is set up properly. I have a similar setup to
yours (actually the config I listed above). Here are the ipchains rules I
added to /etc/rc.d/rc.local

#network *to make alex's machine talk to the outside world
/sbin/ifconfig eth1 inet 10.0.0.1 netmask 255.255.255.0
/sbin/ipchains -A forward -j MASQ -s 10.0.0.0/24 -d 0.0.0.0/0
/sbin/ipchains -P forward DENY
#end alex's *       

Hope this helps.


> --------------413B060E7684259F215E97C0
> Content-Type: text/plain; charset=iso-8859-2
> Content-Transfer-Encoding: 7bit

> I finally got Road Runner up on my Linux box (and my Win98 box
> separately). Prior to starting on Road Runner, I had my Win98 box and my
> Linux box talking.
> One of the things that I did to get Road Runner to work is switch the
> cables on the two NICS in the Linux box (the cable to the hub was
> switched with the cable to the cable modem). Apparently, Linux (and/or
> I) was confused about which NIC was eth0 and eth1.
> Without changing anything on the Win98 box, I plugged the cable from the
> hub back into the Win98 NIC and voila... they wouldn't talk.
> Does anybody have any suggestions?
> Thanks for your help,
> Jim

> --------------413B060E7684259F215E97C0
> Content-Type: text/html; charset=iso-8859-2
> Content-Transfer-Encoding: 7bit

> <!doctype html public "-//w3c//dtd html 4.0 transitional//en">
> <html>
> <font face="Arial,Helvetica">I finally got Road Runner up on my Linux box
> (and my Win98 box separately). Prior to starting on Road Runner, I had
> my Win98 box and my Linux box talking.</font>
> <br><font face="Arial,Helvetica">One of the things that I did to get Road
> Runner to work is switch the cables on the two NICS in the Linux box (the
> cable to the hub was switched with the cable to the cable modem).
Apparently,
> Linux (and/or I) was confused about which NIC?was eth0 and eth1.</font>
> <br><font face="Arial,Helvetica">Without changing anything on the Win98
> box, I plugged the cable from the hub back into the Win98 NIC and
voila...
> they wouldn't talk.</font>
> <br><font face="Arial,Helvetica">Does anybody have any suggestions?
</font>
> <br><font face="Arial,Helvetica">Thanks for your help,</font>
> <br><font face="Arial,Helvetica">Jim</font></html>

> --------------413B060E7684259F215E97C0--

--
Posted via CNET Help.com
http://www.veryComputer.com/

 
 
 

HELP! Hooking up Road Runner broke my network

Post by The Grunewald » Tue, 11 Jul 2000 04:00:00


Rob (Alex?),
Thanks for your post.
As far as which NIC is eth1 and eth0, wouldn't the fact that when I swapped the
cables between the two NICS and it started to communicate with Road Runner
indicate that I have them connected correctly or am I not understanding
something? In any event, I will try that next to see if I learn anything new.
Is it possible that Linux is confused and is trying to go out eth0 whan I ping
my W98 machine even though it already is connected to and working with Road
Runner? I've included the results of the ifconfig command:

eth0      Link encap:Ethernet  HWaddr 00:A0:CC:27:89:1A
          inet addr:192.168.1.254  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:49 dropped:0 overruns:0 carrier:98
          collisions:0 txqueuelen:100
          Interrupt:10 Base address:0xd800

eth1      Link encap:Ethernet  HWaddr 00:A0:CC:25:4A:09
          inet addr:24.162.228.203  Bcast:255.255.255.255  Mask:255.255.255.192

          UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          Interrupt:11 Base address:0xdc00

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:75 errors:0 dropped:0 overruns:0 frame:0
          TX packets:75 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0

Also the results of the route command:
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.1.254   0.0.0.0         255.255.255.255 UH        0 0          0 eth0
24.162.228.192  0.0.0.0         255.255.255.192 U         0 0          0 eth1
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
0.0.0.0         24.162.228.193  0.0.0.0         UG        0 0          0 eth1

As for my cables, I'm sure they are straight through and not cross-overs.

My configuration is:
2 NICs in the Linux box eth0 to a hub, eth1 to the cable modem
1 NIC in the W98 box to the hub.

Before I got Road Runner connected on the Linux box, I had the W98 box and the
Linux box talking. When I hooked up the cable modem and finally got it working
(partially by switching the cables between eth1 and eth0) the Linux box would
not talk to the W98 box and vice versa. Neither can ping the other. (Actually
before I got Road Runner to work on the Linux box, I got it to work on the W98
box. In order to do that, I had to change the IP address (to use DHCP, delete
the subnet mask and gateway IP address. I restored them when I moved Road
Runner to the Linux box. Before I tried to do anything with Road Runner, both
boxes talked. I hope that wasn't too confusing).

Did you use the "ifconfig eth1 ..." command in your rc.local to setup your eth1
card that wouldn't come up without it? I don't have that in my rc.local, but
ifconfig shows the card active.

Again, thanks for your reply and I'd be greatful for any suggestions.
Jim


> The easiest way to figure out which interface is which is to shutdown eth1
> and look at the lights on the cards....I write "eth1" and "eth0" on the
> cards so I can easily determine what is what.

> Second.....are you sure that both cables are straight thru? Make sure that
> the cables are not x-overs!

> What does your network look like? Road-runner to eth0 on the linux and
> eth1 on the linux to the switch/hub and the win98 eth to the switch/hub?
> Make sure you can ping all interfaces from every box. That is first. Then
> make sure that ipchains is set up properly. I have a similar setup to
> yours (actually the config I listed above). Here are the ipchains rules I
> added to /etc/rc.d/rc.local

> #network *to make alex's machine talk to the outside world
> /sbin/ifconfig eth1 inet 10.0.0.1 netmask 255.255.255.0
> /sbin/ipchains -A forward -j MASQ -s 10.0.0.0/24 -d 0.0.0.0/0
> /sbin/ipchains -P forward DENY
> #end alex's *

> Hope this helps.

> > --------------413B060E7684259F215E97C0
> > Content-Type: text/plain; charset=iso-8859-2
> > Content-Transfer-Encoding: 7bit

> > I finally got Road Runner up on my Linux box (and my Win98 box
> > separately). Prior to starting on Road Runner, I had my Win98 box and my
> > Linux box talking.
> > One of the things that I did to get Road Runner to work is switch the
> > cables on the two NICS in the Linux box (the cable to the hub was
> > switched with the cable to the cable modem). Apparently, Linux (and/or
> > I) was confused about which NIC was eth0 and eth1.
> > Without changing anything on the Win98 box, I plugged the cable from the
> > hub back into the Win98 NIC and voila... they wouldn't talk.
> > Does anybody have any suggestions?
> > Thanks for your help,
> > Jim

> > --------------413B060E7684259F215E97C0
> > Content-Type: text/html; charset=iso-8859-2
> > Content-Transfer-Encoding: 7bit

> > <!doctype html public "-//w3c//dtd html 4.0 transitional//en">
> > <html>
> > <font face="Arial,Helvetica">I finally got Road Runner up on my Linux box
> > (and my Win98 box separately). Prior to starting on Road Runner, I had
> > my Win98 box and my Linux box talking.</font>
> > <br><font face="Arial,Helvetica">One of the things that I did to get Road
> > Runner to work is switch the cables on the two NICS in the Linux box (the
> > cable to the hub was switched with the cable to the cable modem).
> Apparently,
> > Linux (and/or I) was confused about which NIC was eth0 and eth1.</font>
> > <br><font face="Arial,Helvetica">Without changing anything on the Win98
> > box, I plugged the cable from the hub back into the Win98 NIC and
> voila...
> > they wouldn't talk.</font>
> > <br><font face="Arial,Helvetica">Does anybody have any suggestions?
> </font>
> > <br><font face="Arial,Helvetica">Thanks for your help,</font>
> > <br><font face="Arial,Helvetica">Jim</font></html>

> > --------------413B060E7684259F215E97C0--

> --
> Posted via CNET Help.com
> http://www.veryComputer.com/

 
 
 

1. road runner -> home network/firewall help

hi,

i have road runner and this is what i'd like to do.  i'd appreciate it if
you could give me clues on where to start, what to read, and if this is even
possible.

i want my cable modem to connect to a linux machine 1.  machine 1 has two
ethernet cards, one for the cable modem connection and the other will go
into a switch.  machine 2 is a win98 machine which has one ethernet card
which will also go into the switch.  machine 3 is a linux server which has
one ethernet card which will also go into the switch.

i want to set this up so that i can use my road runner connection from both
machines 2 and 3.

i know how to setup the cards and get linux boxes networked together.  i
don't know if this setup will work though.

                                                        /--> win98
cable modem -->   linux machine 1 <
                                                        \--> linux server

i want to put up a firewall and possibly apache.  what else do i need to
setup?  proxy server (forgive me, i don't know what this is for, but point
me to a place and i can read up on it).

thanks for your help,
mark

2. ANSI C++ warning

3. Time-Warner's Road Runner network

4. Linux Mailling lists?

5. Road Runner and Linux with a home network

6. Filters needed for Okidata OL400 (or HPII)

7. Frustrating Network Issue - Redhat 7.0, Linksys Router and NJ Road Runner Cable

8. StarImpress 5.1 use question

9. Need help W/Road Runner

10. Road runner and linux ???Help

11. Road Runner Cable modem -help

12. Road Runner Cable Modem

13. FreeBSD 2.2, Road Runner "cable modem", and so on