Wonky Ping (ping don't work)

[Doug Graham]

On Mon, Apr 20, 2009 at 06:01:28PM -0700, Chris Plasun wrote:
> 
> Here's the routing table:
> 
> ---------------------------------------
> Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> 192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
> 192.168.1.0     *               255.255.255.0   U     0      0        0 eth1
> 127.0.0.0       *               255.0.0.0       U     0      0        0 lo
> default         gateway0        0.0.0.0         UG    0      0        0 eth1
> default         gateway0        0.0.0.0         UG    0      0        0 eth0
> ---------------------------------------

I'm going to go out on a limb and say that many of your problems are
caused by having those two 192.168.1.0/24 entries in your routing table.
Why is eth0 there and what is your eth0 interface physically connected to?
You said you were using eth1 in a previous email, and in that same email,
you showed only one default route (via eth1).  Which might have explained
why external hosts were working, but not hosts on your own subnet.

What happens when you do an "ifconfig eth0 down" or just pull the plug
on your eth0 interface?

> > What tcpdump -nl -ieth1 shows?
> 
> Apparently the board doesn't have that...

If you installed it (or tshark/wireshark), you'd likely see frames going
out the eth0 interface that you really want going out the eth1 interface
(except you'd have to replace -ieth1 with -ieth0 to see that).

--Doug.