I've been scratching my head thinking about this one.  Are you saying you had 
C6100 sleds that worked perfectly, then you swapped something (what?) out, and 
now the existing sleds' NIC2 doesn't work?  Or are you saying new C6100 sleds 
don't come with NIC2 working?

From memory, there are 2 host-side NICs; one or more of these can act in a 
"shared" NIC mode for reduced cabling requirements, and a dedicated BMC-only 
NIC.  I've never seen the shared mode prevent operation from host side.  Are 
these NICs chips on the main planar or is there a separate attachment NIC board 
that is attached in that provides these?

In general the answer here is tough because the functionality you're asking 
about should "just work" and the only way I can imagine it ever not... involve 
really exotic scenarios.

You might try booting Linux, see what the kernel detects in dmesg, and also 
look through lspci to see if the NIC devices are there.  Actually, wait.  That 
might be it.. how many CPUs do you have?  I don't have the schematic in front 
of me, but typically these are sold as 2 CPU sleds.  If the second NIC is hung 
off the second CPU's PCIe for performance optimization reasons, missing CPU --> 
no PCIe root port --> no NIC2.




  Michael Stumpf
  Storage, Embedded Management
  Dell EMC | PowerEdge Portfolio Sys Engr

From: poweredgec-tools-bounces <[email protected]> On 
Behalf Of Jason Macer
Sent: Saturday, January 4, 2020 5:49 PM
To: poweredgec-tools
Subject: [Poweredgec-tools] First Generation Dell Xanadu C6100 XS23-SB


[EXTERNAL EMAIL]

I have a 5 of these enclosures, each with 4 nodes, and I have generally *knock 
on wood* had very few problems with them. I have even been contemplating 
building a custom on/off/reset button feature as the board has the pins there 
to handle that, and even the LED's for activity and power. My little 
environment has these guys, plus some r905, and 2-3 C6100 XS23-TY3 enclosures 
all running proxmox 5.2, and they really do the job just fine.

A while back I purchased an enclosure with no memory/processors/hard drives to 
use as spare parts, and last weekend I had to actually replace one of my 
boards. Everything went smoothly, and it didn't take me long to swap it out. 
Got everything back together and it worked like a champ, or so I thought.

Like I said, everything works great except for one tiny, somewhat significant 
problem: NIC1 works NIC2 does not. In bios NIC1 shows up with the MAC address, 
but NIC2 shows no MAC address. Bad board, right? So I tried out a second 
board... Same issue. Then, a third... Same issue.

So here is my question, what in the heck am I missing here. I cannot believe 
that all three of these boards have a bad NIC2.

Has anyone else run into this issue?
- J -
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