Network Interface allows incoming traffic but won't connect to anything.

Dear All

I have a dell 1650 server with two Intel Etherexpress/1000 NICS,
running RH linux 7.3. One of the NICS is disabled.

ifconfig shows

eth0 Link encap:Ethernet HWaddr 00:06:5B:F6:63:73
inet addr:10.80.18.207 Bcast:10.80.23.255
Mask:255.255.248.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:979979 errors:0 dropped:0 overruns:0 frame:0
TX packets:9753 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:116652031 (111.2 Mb) TX bytes:1651268 (1.5 Mb)
Interrupt:17 Memory:feb60000-feb80000

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:603 errors:0 dropped:0 overruns:0 frame:0
TX packets:603 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:66400 (64.8 Kb) TX bytes:66400 (64.8 Kb)

and netstat -rn shows

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window
irtt Iface
10.80.16.0 0.0.0.0 255.255.248.0 U 40 0
0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 40 0
0 lo
0.0.0.0 10.80.16.1 0.0.0.0 UG 40 0
0 eth0

The problem is that I cant connect to anything. ie if I ping
localhost or the server's own IP address I get a reply, but anything
else, including other boxes on the same subnet and the GW just give
host unreachable.

Other boxes with exactly the same configuration (but different
NICs/IP) work fine and can even ping the dell on its IP address and
receive a reply.

The problem seems intermittent, yesterday I could ping another box on
the same subnet, but today it's gone again.

Can anyone suggest either what I can do to fix this :-) or
alternatively what can be done to further investigate this problem?
Is there a way to isolate it, ie to confirm it's the NIC, driver etc.

Many thanks


Paul

(E-Mail Removed) (Paul Rogers) wrote in message news:<(E-Mail Removed) om>...
> Dear All
>
> I have a dell 1650 server with two Intel Etherexpress/1000 NICS,
> running RH linux 7.3. One of the NICS is disabled.

I can also use SSH to connect to the machine and administer it. I can
also connect to the web server on it and view any content stored on
it, but at the point at which it tries to connect to another server
(RDBMS, mail etc) it fails.

Any suggestions

Paul