NIC no-carrier issue

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Yeonju Ro

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Mar 16, 2022, 3:37:35 PM3/16/22
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Hi,

We are running an experiment on Cloudlab machines,
Our project name is yro-118270 and there are two nodes under this project.
The problem is the NIC in node1 (amd136.uta.cloudlab.us) shows that it has no carriers.
The exact information this NIC shows isenp65s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP>and link to this NIC is not detected.
We are thinking this NIC is somehow not connected to switch or something,
so could you let us know what could we try here?

Best,
Yeonju

Leigh Stoller

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Mar 16, 2022, 3:49:58 PM3/16/22
to cloudla...@googlegroups.com
Hi. These NICs sometimes need an extra kick to get running, we are
not sure why. The first thing to try is clicking on the node in the
topology, and using the Power Cycle option to see if that kicks it
into gear.

If that does not help, let us know so we can check the cabling.

Thanks
Leigh


Leigh Stoller

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Mar 16, 2022, 6:10:14 PM3/16/22
to Yeonju Ro, cloudla...@googlegroups.com

> I have tried the Power Cycle option as you mentioned but still it says NO-CARRIER and when I run ethtool, Link detected says no.
> I attached screenshots I have, and could you generously check the cabling of that NIC?

Hi, no private messages please, always reply to All.

OK, looks like the switch lost the state, it should be restored now.

Leigh


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