Network Interface Down on CloudLab Node sm220u-10s10535

[Mirco Barone]

Hello,

I have a running experiment on CloudLab:
https://www.cloudlab.us/status.php?uuid=b0992b67-bcc5-11f0-bc80-e4434b2381fc
and I am experiencing an issue with one of the nodes.

On machine sm220u-10s10535, the network interface ens2f1np1 is down.
Attempts to bring it up fail, showing NO CARRIER.

Could you please help me investigate or restore connectivity for this
interface? Any assistance would be greatly appreciated.

Thank you very much,

Mirco Barone

[Ashfaqur Rahaman]

I am facing the same issue on Node sm110p-10s10607 machine type sm110p interface ens2f0np0. I can ping between two machines through that interface, but can't do any RDMA related experiments.

Output from `ip a show ens2f0np0`:

```

3: ens2f0np0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 9000 qdisc mq state DOWN group default qlen 1000
    link/ether b8:3f:d2:13:08:9e brd ff:ff:ff:ff:ff:ff
    altname enp81s0f0np0
    inet 10.10.1.2/24 brd 10.10.1.255 scope global ens2f0np0
       valid_lft forever preferred_lft forever

```

Relevant output from `ethtool ens2f0np0`

```
Link detected: no (Link training failure, Remote side is not ready yet)

```

Link to the experiment: https://www.cloudlab.us/status.php?uuid=505e3d8a-c0c4-11f0-bc80-e4434b2381fc

Thank you.

Kind regards,

Ashfaq

[Ashfaqur Rahaman]

Sorry, a correction to my previous message, ping to 10.10.1.1 is also failing.

Thank you.

Kind regards,

Ashfaq

[Mike Hibler]

I could not find the problem from my position in Utah, so someone from
Wisconsin will have to take a look tomorrow at the physical cable and
connections.

Sorry!

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[Mirco Barone]

Thank you, Mike. I appreciate the update.
I hope the issue can be resolved soon.

Best regards,
Mirco Barone

Il giorno ven 14 nov 2025 alle ore 02:46 Mike Hibler
<mi...@flux.utah.edu> ha scritto:

> To view this discussion visit https://groups.google.com/d/msgid/cloudlab-users/20251114014644.GJ76983%40flux.utah.edu.