Error. Failed to generate DSA key

Question

Hi, I have two N3048P switches in a stack running version 6.5.4.18 and I am trying to get ssh configured. Telnet is enabled so I can access it remotely currently, but would like to use ssh. What I did: 1. Enter into configuration mode: (conf t) 2. no ip ssh server 3. crypto key zeroize dsa 4. crypto key zeroize rsa 5. crypto key zeroize pubkey-chain ssh 6. crypto key generate dsa  ... I get an error showing 'Error: Failed to generate DSA key.' When trying it with RSA first, I get a similar error: 'Error. Failed to generate RSA key.' Any reason why this is the case?

DELL-Chris H · Accepted Answer

Rocknwatch,   I haven't heard of this happening specifically. What I suggest is that if you have any downtime, would you try breaking the stack to then change the setting on the master, and then stack it again and see if it successful. If so the issue may be performing within the stack.    Let me know.

DELL-Young E · Answer

Hi, thanks for choosing Dell. There is a procedure to enable SSH session in N-Series switch. Please see the attached screenshot. That is the command sets for creating SSH server.https://dell.to/3MzFke1And your configuration is wrong.https://dell.to/3MmdYrE

rocknwatch · Answer

The link you provided is the one I was following to set things up. My configuration is not wrong as it works just fine on two other N3048P switches. For some reason, I get the error stating this particular switch stack fails to generate a dsa key and an rsa key.    If you have any other relevant solutions, I would be happy to try them. Thanks.

DELL-Chris H · Answer

Rocknwatch,   So just to clarify, the two switches in this specific stack are getting the error, but two other switches in a different stack do not give the error? Are the two other switches different in model, firmware, OS, or anything else that you notice?   Let us know.

rocknwatch · Answer

Hi Chris, Thanks for the reply. The switches in the stack report an error generating rsa and dsa keys. The two other switches are N3048P switches with the same firmware, but are not stacked and do generate keys just fine and ssh is configured and working on them. I tediously compared running configs on them to see what is different and can't seem to find any relevant differences (e.g. ip addresses, vlan access on ports, etc.) Thanks!

rocknwatch · Answer

Hey Chris, Thanks for the tip. I'll try that when I get back to that location early next week and let you know how it behaves.   Thanks!

rocknwatch · Answer

Hey Chris, I was able to generate keys and configure the ssh server on the switches after breaking the stack. Thanks a ton for the help!   Pete

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