Re: No link with BCM57412 (Broadcom Extreme NetXtreme-E 10Gb) [SOLVED]

[Mihaly Zachar <zmihaly@gmail.com>]

On May-19 13:55, Dan Ritter wrote:
> Mihaly Zachar wrote: 
> > I have never used fibre connection yet. Now I got a server where the HW
> > (Dell R440) and the network connections are provided by others, my task
> > is to install a Linux on it.  
> > 
> > I installed a fresh Debian 12, the built-in NIC (BCM5720) is working, it
> > also can see the BCM57412 card ports, but I have no link for some
> > reason.
> > 
> > 
> > Here are the relevant outputs:
> > 
> > https://pastebin.com/ghbSySfC
> > 
> > As you can see, there is no link detected unfortunately, one of them has
> > unknown speed, the other can see that the speed is 10000Mb/s.
> > 
> > Additional information can be that the server is connected to a fibre
> > switch, wich is used by several other Windows boxes.
> > 
> > They used the very same fibre cable (LC/UPC - LC/UPC - MM - DX whatever
> > it means).
> > 
> > What do I miss here? 
> 
> ens2f0np0 doesn't have a fiber optic cable plugged in.
> ens2f0np0 won't work until someone plugs a new cable into it.
> 
> ens2f1np1 has a cable plugged in, but no link detected.
> ens2f1np1 won't work until the switch on the other side turns it
> up.
> 
> fiber cables are very easy to damage and fairly easy to
> accidentally not plug in completely.
> 
> -dsr-

Hi Dan,

Thanks for your reply. 
Finally I got a sysadmin who went to the co-location center and checked
a few things..

He replaced the cable, changed switch ports etc, without success...

I still had no link detected unfortunately.

That guy installed a Win 2022 server and configured that sswitch port
without touched anything and the port worked immediately.

I re-installed the Debian 12 and checked the link with ethtool and still
had no link.

I configured an IP in the ens2f1np1 anyway and what happened?
It worked .. :(

I thought that there should be link even if there is no IP configured...
Lesson learned.

Thanks,
Misi