On Wed, 29 Aug 2001, Brian Sroufek wrote:
> 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
All you need is a working default route. You do NOT need explicit
routes to your DNS servers, though until you identify them in resolv.conf
you won't be able to use DNS names. For a static connection, the
complete routing table should look something like:
netstat -nr
or
route -n
------------
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
65.3.93.0 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 15 0 0 lo
0.0.0.0 65.3.93.1 0.0.0.0 UG 30 0 0 eth0
------------
Anything more than that is asking for a subtle mistake to come back and
bite you later. Since the first route in this table is usually inserted
automatically when you configure eth0 in a 2.2 kernel, you may not need
ANY static routes in the configuration files.
>
> 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.
0.0.0.0 means different things in different places, though the word
"default" is used as a text equivalent. Only your last route is a
"default route" though, which can be identified because it has 0.0.0.0
_in the first column_.
>
>
>
> 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
>
>
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