Dell PowerEdge M420 Reference Manual page 1507

the switch configuration; they are saved in the file system and the private key
is never displayed to the user. RSA keys, along with other switch credentials,
are distributed to all units in a stack on a configuration save.
Example
The following example generates RSA key pairs.
console(config)#crypto key generate rsa
crypto key pubkey-chain ssh
Use the crypto key pubkey-chain ssh command in Global Configuration
mode to enter public key configuration mode in order to manually specify
public keys such as SSH client public keys.
Syntax
crypto key pubkey-chain ssh
Default Configuration
By default, this command has no public keys configured.
Command Mode
Global Configuration mode
User Guidelines
This command has no user guidelines.
Example
The following example enters the SSH Public Key-chain configuration mode.
console#configure
console(config)#crypto key pubkey-chain ssh
console(config-pubkey-chain)#user-key bob rsa
console(config-pubkey-key)#key-String
1503
SSH Commands