Re: Fedora 2 - Can't Get on LAN

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Date: Sun, 26 Sep 2004 05:16:47 GMT

What he said, plus verify you don't have IPTables running.

(Yeah I know that techincally it's part of the kernel and alway
running even if the ruleset is blank)

-Chris

On 24 Sep 2004 08:40:28 -0700, rdgentry1@cablelynx.com (P Gentry)
wrote:

>"Luke" <nomail@nospam.com> wrote in message news:<waH4d.143221$3l3.126954@attbi_s03>...
>> I'm hoping someone can help me. I just installed Fedora Core 2 on a system
>> that was running Red Hat 9. The problem is that I can't get on my LAN. The
>> NIC is a Intel Ethernet Pro 100. Here's what I've tried:
>>
>> 1. cable and NIC adapter are ok (ran fine under Red Hat 9)
>> 2. lspci -v shows "Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro
>> 100]
>> Subsystem: Intel Corp. 82559 Fast Ethernet LAN on
>> Motherboard"
>> 3. I tried both a DHCP setup and a static IP. I used the Network device
>> control app under System Tools. I have the gateway and netmask setup
>> correctly
>
>If dhcp is available (from ISP?) then you are likely in a subneted
>environment and will have a GW IP address for default routes -- see
>below.
>
>> 4. ifconfig shows that everything is setup on eth0, buth there is no data
>> moving RX bytes = 0 and TX bytes = 0
>
>Probably not needed, but it's always handy to provide ifconfig output.
> Command/data output is _always_ preferred to descriptions of the
>output.
>
>> 5. Ran ethereal on another system on the same hub as the Fedora box. It
>> showed that ARP packets from the Fedora box were being sent and received
>
>Did you run ethereal on the "problem" host? "arp -v"? "netstat -rc"?
>
>> 6. I can ping the loopback adapter and when assigned a static IP I can ping
>> the Fedora box from the Fedora box
>
>Good ...
>
>> 7 Here's the output from route:
>> Destination Gateway Genmask Flags Metric Ref Use
>> Iface
>> 10.1.249.0 * 255.255.255.0 U 0 0
>> 0 eth0
>> 169.254.0.0 * 255.255.0.0 U 0 0
>> 0 eth0
>> 127.0.0.1 * 255.0.0.0 U 0 0
>> 0 lo
>> default * 0.0.0.0 UG 0
>> 0 0 eth0
>>
>> The only conclusion I've left with is that the Fedora box Network stack is
>> somehow disconnected from Ethernet adapter. Any help would be greatly
>> appreciated. Thanks.
>
>Note the entry for your default route -- there is no gw IP, which
>pretty much makes this entry useless and problematic.
>
>Presumably this host sits on the 10.1.249.0 subnet and should be using
>a gw on that subnet to route packets beyond the local subnet
>(typically 10.1.249.1 or sometimes 10.1.249.254).
>
>If this is strictly a local, private lan made of a single segment,
>hosts connected via a hub/switch, then you don't really need a gw as
>arp will find the proper mac addresses for the other hosts (since it
>appears you've not turned off arp).
>
>If your lan is segmented (ie., employs a router between segments) then
>you probably want a default gw (and its IP).
>
>If you wish to restrict this host to "local" traffic, then you don't
>need a default route.
>
>If you have a router facing the internet you will have to provide a gw
>IP to move traffic for this host.
>
>If you don't need a default route, get rid of the entry. If you need
>a default route, provide a gw IP so that the packets (actually the
>ethernet frames) are properly addressed.
>
>hth,
>prg
>email above disabled

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