Hi,

We have observed an intermittent issue with networking while installing our 
Dell R230 server. Please see the details below.

After the target OS installation the network was not accessible. Looking at the 
ifconfig output we saw that there were some TX packets sent but no RX received. 
We have tried various settings in the server configuration to resolve the issue 
and found 2 ways that worked for us:

1) Configure the NIC IP address in R230 settings with the same IP we wanted to 
use on our system. Hovewer, when we switched the IP on the OS side, server had 
become unavailable again.
2) Configure the iDRAC IP in the same subnet with the IP address supposed to be 
used by OS and set "OS to iDRAC Passtrough" option to "LOM". It looks like this 
setting doesn't have any direct influence on the host networking, but we have 
suggested that it can change some internal routing in the R230. Anyway, it made 
the system working.

On the other hand we have the second server that has same hardware with the 
problem one (according to the hardware diagnostic dump). On this server the 
problem has not been reproduced - we just powered it on, installed our OS from 
CD and set the IP address on the OS side. The second server works fine without 
any additional configurations.

The main problem is that after resetting iDRAC and NIC configuration parameters 
of the problem server to default, the problem has disappeared. It is not 
reproducible now - we can use the server with no NIC IP config and no iDRAC. 
So, unfortunately we are not able to catch logs or traces for now.

The operating system we have installed is the old customized Debian 4.0 (x32), 
however the same OS was installed without any issues on the second server. So 
it doesn't seem this is related.

Could you please take a look at this and provide some explanation of that? Is 
there any existing problem that can cause such a behavior?

Thanks in advance!

Thanks,
Evgeniy Kuzmin

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