Are you using IP addresses in the ping command?  When diagnosing a
problem, start simple and work you way forward one step at a time.  A ping
with an IP address is about as simple as you can get.  

Also, make sure you get viable MAC address in the HWaddr field of the
ifconfig command for your interface. This tells you that the driver can
talk to the NIC.

If you think you have a route table problem and you have the iproute
package installed, try something like 'ip r g 192.168.1.x', where
192.168.1.x is the IP address you were trying to ping.  This command will
return the route the kernel selects to forward the packet.

rna

On Fri, 25 Apr 2003, Vaughn Treude wrote:

> Hello:
> Yet another dumb question related to my new setup.  My NIC is configured and 
> ifconfig claims it's UP.  I have the table set up correctly - at least, it's 
> configured the same as on my older Mandrake system (see below.)  I know the 
> NIC, cable and router all work because it worked in Red Hat on the system in 
> question.  I've supposedly set the firewall rules "off" because this is an 
> internal system.  What happens is that when I try to ping any other system on 
> the LAN (or any other system tries to ping the new system) I get "Destination 
> Host Unreachable."  A check of the ifconfig seems to indicate that eth0 has 
> no send or receive bytes, but loopback (lo) increases the values of both 
> numbers each time I do the ping.  The "hostname" is set correctly; the 
> computer with that hame "vaughn.nakota.com"  is defined with the correct IP 
> address in the hosts file.  I also tried tinkering with the hosts.allow file, 
> but my other systems work with out it (hosts.deny is empty.)   
> 
> Output of route:
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
> 127.0.0.0       *               255.0.0.0       U     0      0        0 lo
> default         basil           0.0.0.0         UG    0      0        0 eth0
> 
> The system "basil" is my gateway and its IP is defined in the hosts file.
> Any ideas?  It seems like I've probably got some simple setting wrong 
> somewhere.
> 
> Thanks,
> Vaughn
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