Cisco 9300 UXM port issue

[iTWeb_jgao]

Hi all,

We are having some new 9300 UXM in production replacing the 3850s, and meet a strange issue.

There are some old POE devices running well on 3850. But with the new 9300UXM, we can see the port POE status is up, however the port status shows "notconnect". Thus the devices can't connect to network. We reconnect them back to 3850 or to 9300U with "17.6.1" OS, they are working well.

We have tried 9300UXM different OS "16.12.06" and "17.6.1", tried setting speed & duplex, tried replacing cables but still no luck.

Any suggestion will be great appreciated.

Thanks,

Michael 

[Leo Laohoo]

UXM means some ports are multi-Gig.  This also means that they will not support 10 Mbps. 

Move those clients to ports that are not mGIG.

[iTWeb_jgao]

Thanks. The old devices are 100M not 10M. I tried connecting to 2.5G port and 10G port on UXM but no difference.

[Leo Laohoo · Accepted solution]

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@iTWeb_jgao wrote:
Thanks. The old devices are 100M not 10M.

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I don't care.  I speak from experience. 

I have seen wired devices that are 100BaseTx but still require 10 Mbps for channelling and signaling.  

[iTWeb_jgao]

When connecting to 3850 or 9300U, it auto negotiates at 100M/Full. So doesn't it make sense that UXM asks for 10M? 

[Leo Laohoo]

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@iTWeb_jgao wrote:
So doesn't it make sense that UXM asks for 10M? 

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Read what I said:  I have seen 100BaseTx Medical-grade, IoT (Internet of Trash) devices need 10 Mbps for channelling and signalling.

Move the wired client to a port that is not mGIG.  

[iTWeb_jgao]

We don't have any other model switches in production. Looks like non-mGIG port is n/a on UXM itself.