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Last reply by 07-15-2022 Solved
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Can't clear VTY line and can't access SSH

Hi, Folks,

I'm facing an issue with the DELL model S5048F that was recently updated. I can't access via SSH and I can't clear VTY sessions with the command "clear line vty x or clear line x"
I ran the cleanup command but it doesn't remove vty line

Replies (27)
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386

Hi, Charles
I access the console and I try to use the clear command but the sessions continue and it is already activated "concurrent-session clear-line"
It is possible to login via start shell and kill vty sessions or some other alternative

 

 

2 Bronze
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385

Everything indicates that the SSH process is stuck

384

Hi @DiegoCJ,

 

Could you run a show tech support to check the ONIE and Firmware Updater version? 

 

I spoke to one of my co-worker in networking about your issue, and he mentioned that he has some suspicion on the SSH configuration. You mentioned you have contacted Dell support? - Have you tried asking them to check the SSH configuration? It's an analysis of the switch configuration logs.


DELL-Joey C
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

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365

OK I will collect this information

Thanks

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We are facing the same issue with some Dell S4048-ON switches that were recently updated to version 9.14 (2.14).

We can't connect via SSH or Telnet. When we connect by console we see that there are no users using the VTY and we do not see a high use of CPU or management-CPU.

We tried disabling and enabling the SSH and Telnet services, but the problem was not solved.

There are already 04 switches out of a total of 30 upgraded switches that have the same problem.

We will make a ticket to Dell with the background that we have collected.

278

We ran some more tests and found that the problem itself is the ssh service.

We were able to connect to the switch by console and when performing a "show ip server", we see that the service is enabled. When trying to disable it with the "no ip ssh server enable" command, the console would get stuck without responding.

After a while, we recovered the connection through the console and we were able to verify that the service remained enabled, despite having executed the command to disable it.

Finally, we then decided to reboot the switch and connect again by console. This time the ssh service was disabled.

I don't think rebooting a switch is a valid workaround.

Does anyone have another clue about this issue?

Still have no answer from Dell.

2 Bronze
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266

We ran some more tests and found that the problem itself is the ssh service.

We were able to connect to the switch by console and when performing a "show ip ssh", we see that the service is enabled. When trying to disable it with the "no ip ssh server enable" command, the console would get stuck without responding.

After a while, we recovered the connection through the console and we were able to verify that the service remained enabled, despite having executed the command to disable it.

Finally, we then decided to reboot the switch and connect again by console. This time the ssh service was disabled.

I don't think rebooting a switch is a valid workaround.

Does anyone have another clue about this issue?

Still have no answer from Dell.

264

Hi, redesSTI. Do you have the official ticket # you submitted to the tech support?


DELL-Young E
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
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256

Hi:

The ticket number is xxx. (modified by admin)

Thanks in advance

252

Hi, I see that there's an engineer engaged for the ticket and you have been contacted. Best you carry on conversing with him for troubleshooting. Have a great one.


DELL-Young E
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

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