I JUST finished this configuration on my RH 7.1/eth0/hub/Cable Modem.
The issue that was frustrating was the 'ifconfig','static-routes',
gateway, netmask and /broadcast on eth0/ with netmask 255.255.255.0
//and// setting the /default gateway/.
machine: dev-server-1.msdincdev.com
ip: 65.3.93.207
2nd ip on other machine: 65.3.93.137
gateway: 65.3.93.1
NOTE: you should have static routes in /etc/sysconfig/static-routes
to your DNS servers as well as their entries in /etc/resolv.conf
Also, enter a network (mask 255.255.255.0) for your dns server's IP.
[ifconfig -a output]
---------------------------
eth0 Link encap:Ethernet HWaddr 00:E0:B8:11:78:21
inet addr:65.3.93.207 Bcast:65.3.93.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1765537 errors:0 dropped:0 overruns:0 frame:0
TX packets:126807 errors:0 dropped:0 overruns:0 carrier:0
collisions:150 txqueuelen:100
Interrupt:9 Base address:0x1080
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:1193 errors:0 dropped:0 overruns:0 frame:0
TX packets:1193 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
----------------------------
route output:
---------------------------
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
dev-server-1.ms dev-server-1.ms 255.255.255.255 UGH 1 0 0 eth0
c1245308-a dev-server-1.ms 255.255.255.255 UGH 1 0 0 eth0
hydrogen.liquid 65.3.93.1 255.255.255.255 UGH 5 0 0 eth0
65.3.93.1 65.3.93.1 255.255.255.255 UGH 1 0 0 eth0
proxy2.denver1. 65.3.93.1 255.255.255.255 UGH 1 0 0 eth0
msdesigninc.com 65.3.93.1 255.255.255.255 UGH 5 0 0 eth0
localhost localhost 255.255.255.255 UGH 1 0 0 lo
proxy1.denver1. 65.3.93.1 255.255.255.255 UGH 1 0 0 eth0
65.3.93.0 * 255.255.255.0 U 0 0 0 eth0
65.3.93.0 65.3.93.1 255.255.255.0 UG 5 0 0 eth0
24.10.132.0 65.3.93.1 255.255.255.0 UG 5 0 0 eth0
127.0.0.0 localhost 255.0.0.0 UG 5 0 0 lo
127.0.0.0 * 255.0.0.0 U 15 0 0 lo
default 65.3.93.1 0.0.0.0 UG 30 0 0 eth0
---------------------------
route -n output:
---------------------------
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
65.3.93.207 65.3.93.207 255.255.255.255 UGH 1 0 0 eth0
65.3.93.137 65.3.93.207 255.255.255.255 UGH 1 0 0 eth0
66.78.41.2 65.3.93.1 255.255.255.255 UGH 5 0 0 eth0
65.3.93.1 65.3.93.1 255.255.255.255 UGH 1 0 0 eth0
24.10.132.180 65.3.93.1 255.255.255.255 UGH 1 0 0 eth0
66.78.41.53 65.3.93.1 255.255.255.255 UGH 5 0 0 eth0
127.0.0.1 127.0.0.1 255.255.255.255 UGH 1 0 0 lo
24.10.132.178 65.3.93.1 255.255.255.255 UGH 1 0 0 eth0
65.3.93.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
65.3.93.0 65.3.93.1 255.255.255.0 UG 5 0 0 eth0
24.10.132.0 65.3.93.1 255.255.255.0 UG 5 0 0 eth0
127.0.0.0 127.0.0.1 255.0.0.0 UG 5 0 0 lo
127.0.0.0 0.0.0.0 255.0.0.0 U 15 0 0 lo
0.0.0.0 65.3.93.1 0.0.0.0 UG 30 0 0 eth0
---------------------------
Notice the /default/ routes are 0's, which
basically allows the local ISP network
to route your non-static and non-local
traffic when you don't have a specified
route.
Nick wrote:
> Here is the situation:
> I moved to a place where we have ADSL. My system was configured to use my
> ethernet card but with no proto and the IP of 168.192.0.1 When I moved I
> switched that to use dhcp and wiped the IP address from netcfg. Everything
> worked like a champ. Then I got dumb.
>
> I found a eth0.OLD in the netcfg interfaces dialoge. So I deleted it. "Why
> should it need it?" was my thought. Well that killed the eth0's connection.
> I restarted it and it worked fine again. Well that was Monday night. When I
> went to check email on Tuesday morning eth0 would not work. I ran down the
> diagnostic this way:
> 1) check to see if eth0 had obtained an IP from the router; it had.
> 2) check to make sure eth0 was sending by watching the pretty little lights
> on the card; they did
> 3) check to make sure the hub is registering the activity to it; it was
> 4) check to see if the router was recieving from the hub; it was. However
> there was no activity lights working on the WAN side of the display on the
> router or on the DSL modem itself.
>
> This all seemed really wierd to me. So figured that the hardware was
> funtioning but maybe configuration was somehow messed up with the eth0. I
> decided the best thing to do was to reinstall RH 7.1. It was not big thing
> because I didn't have anything but a few text docs to backup to disk. I did
> reintstall RH7.1 and the problem didn't go away. I am at a total lose as to
> what to do to fix the problem. I have a Linksys Etherfast 10/100 card and it
> has worked fine in the past and seems to be now.
>
> If anyone could lend a hand I would greatly appreciate it. I don't want to
> go back to having to use Windows (SoS - Software of Shame). I am using dial
> up through the college right now so I will check email once or twice a day or
> if anyone is ambitious and would not mind giving me a ring at 530-297-1750 I
> would be indebted.
>
> Nick
