Re: [cloudlab-users] Mellanox switch ethernet port down

[Mike Hibler]

Look at the log files on the switch and there should be messages about
when and hopefully why the port was disabled. It could be that you have
created a loop in the node/switch topology and spanning tree blocked the
port. Or it could be that speed, flow control, or FEC is mismatched between
the switch and the node. If you have a node/switch link that is working,
compare the settings on the two and see if there is a difference.

On Wed, May 11, 2022 at 06:40:40AM -0700, paridhika kayal wrote:
> Hi,
>
> One of my ethernet ports of mlnx switch connected to node 3 is down. Can you
> please tell me what could be the reason?
>
> ualloc-mlnx2 [standalone: master] (config) # show interfaces ethernet 1/3
>
> Eth1/3:
> Admin state : Enabled
> Operational state : Down
> Last change in operational status: 0:27:07 ago (6 oper change)
> Boot delay time : 0 sec
> Description : N\A
> Mac address : ec:0d:9a:5f:d8:3e
> MTU : 1500 bytes (Maximum packet size 1522
> bytes)
> Fec : auto
> Flow-control : receive off send off
> Actual speed : 25 Gbps
> Auto-negotiation : Enabled
> Width reduction mode : Unknown
> Switchport mode : access
> MAC learning mode : Enabled
> Forwarding mode : inherited cut-through
>
> Here is the link to my experiment: https://www.cloudlab.us/status.php?uuid=
> 14d2896a-c928-11ec-b318-e4434b2381fc
>
> Thanks,
> Paridhika
>
> --
> You received this message because you are subscribed to the Google Groups
> "cloudlab-users" group.
> To unsubscribe from this group and stop receiving emails from it, send an email
> to cloudlab-user...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/
> cloudlab-users/892d965c-58bf-4c68-be4b-19a86cc52baen%40googlegroups.com.

[paridhika kayal]

I tried rebooting the switch and the node. Now the port is up but the node is still not rechable. I am not able to ping node 3.