13 Posts
0
3340
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
redesSTI
17 Posts
0
June 28th, 2022 14:00
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.
DELL-Young E
Moderator
Moderator
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3.6K Posts
0
June 28th, 2022 19:00
Hi, redesSTI. Do you have the official ticket # you submitted to the tech support?
redesSTI
17 Posts
0
June 29th, 2022 15:00
Hi:
The ticket number is xxx. (modified by admin)
Thanks in advance
DELL-Young E
Moderator
Moderator
•
3.6K Posts
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June 29th, 2022 21:00
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.
Doofey
3 Posts
0
July 4th, 2022 18:00
I have the same issue, was this resolved?
DiegoCJ
13 Posts
1
July 5th, 2022 05:00
My team opened the ticket with Dell support and resolved. I will let you know the workaround
redesSTI
17 Posts
0
July 7th, 2022 11:00
We still have the issue. We have confirmed on several switches that it is the "ssh service" that is stuck and it is not possible to disable it with the command "no ip ssh server enable".
Unfortunately, the switch we made the ticket with had the support expired, so we could not follow up with the ticket.
Any ideas or solutions?
redesSTI
17 Posts
0
July 8th, 2022 06:00
Thank you @DiegoCJ!!!.
It worked perfectly as a temporary solution to the problem. Now it is possible to disable the ssh service.
Now, let's wait for Dell to provide a definitive solution.
Doofey
3 Posts
0
July 10th, 2022 23:00
still not working for me, do I need to remove the following PID as well
Jul 11 16:28:04.518 AEST %STKUNIT1-M:CP %CLI-0-REMOTE-EXEC: RCMD: remote-exec CP ps -aux | grep ssh
ps -aux | grep ssh
root 4577 0.0 0.0 0 0 ? Z - 0:00.00 (sshd)
root 12783 0.0 0.0 1860 1012 ttyp1 S+ 6:28AM 0:00.00 grep ssh
root 4529 0.0 0.3 234080 9884 tty01 S+ 20Jun22 42:33.11 sshd: sshd -r
also, if i put this no ip ssh server enable, it will automatically re-enable the ssh
Doofey
3 Posts
0
July 11th, 2022 00:00
oh hey its all good now, i also remove this line and it works
root 4529 0.0 0.3 234080 9884 tty01 S+ 20Jun22 42:33.11 sshd: sshd -r
redesSTI
17 Posts
0
July 15th, 2022 06:00
Is there any news about new releases that definitively solve the problem?
We ran the workaround of "killing" the ssh service on a couple of switches and it worked fine for a while, but then the ssh service got stuck again.
As a workaround, we had to enable the telnet service on the switches, which is clearly not the best thing to do.
Regards