Secure Shell (SSH)

NVIDIA NVDA-OS XC User Manual for NVIDIA MetroX-3 XC Appliance v18.02.2300 LTS
Note

It is recommended not to use more than 50 concurrent SSH sessions.

To add entries to the global known-hosts configuration file and the SSH value of the hosts that can remotely access the appliance using SSH, do the following.

  1. Change to Config mode.

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    metrox > enable metrox # configure terminal metrox (config) #

  2. Add an entry to the global known-hosts configuration file and its SSH value.

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    metrox (config) # ssh client global known-host "myserver ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAsXeklqc8T0EN2mnMcVcfhueaRYzIVqt4rVsrERIjmlJh4mkYYIa8hGGikNa+t5xw2dRrNxnHYLK51bUsSG1ZNwZT1Dpme3pAZeMY7G4ZMgGIW9xOuaXgAA3eBeoUjFdi6+1BqchWk0nTb+gMfI/MK/heQNns7AtTrvqg/O5ryIc=”

  3. Verify what keys exist in the host.

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    metrox (config) # show ssh client SSH client Strict Hostkey Checking: ask   SSH Global Known Hosts: Entry 1: myserver Finger Print: d5:d7:be:d7:6c:b1:e4:16:df:61:25:2f:b1:53:a1:06   No SSH user identities configured.   No SSH authorized keys configured.

    Note

    RSA2 and a DSA2 host keys are generated by default. The RSA2 key can be used as SSH server and client, while DSA2 key can only be used as SSH client.
    When the switch is a server, use RSA key to connect to the MetroX XC device.

    When the switch is a client (e.g., downloading image or uploading logs), RSA key is recommended. DSA key is only for legacy devices and has been deprecated by OpenSSH starting with the 7.0 release.

To stop the CLI and set the system to send return errors if some commands fail, do the following.

  1. Connect to the system from the host SSH.

  2. Add the flag "-h" after "cli" to notify the system to halt on failure and pass through the exit code.

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    ssh <username>@<hostname> cli -h '"enable" "show interfaces brief"'

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