Setup Guide

ssh {hostname} [-l username | -p port-number | -v 2}| -c encryption cipher | -m HMAC
algorithm
hostname is the IP address or host name of the remote device. Enter an IPv4 or IPv6 address in dotted decimal format
(A.B.C.D).
● SSH V2 is enabled by default on all the modes.
● Display SSH connection information.
EXEC Privilege mode
show ip ssh
The following example uses the ip ssh server version 2 command to enable SSH version 2 and the show ip ssh
command to confirm the setting.
DellEMC(conf)#ip ssh server version 2
DellEMC(conf)#do show ip ssh
SSH server : enabled.
SSH server version : v2.
SSH server vrf : default.
SSH server ciphers : 3des-cbc,aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-
ctr,aes256-ctr.
SSH server macs : hmac-md5,hmac-md5-96,hmac-sha1,hmac-sha1-96,hmac-
sha2-256,hmac-sha2-256-96.
SSH server kex algorithms : diffie-hellman-group-exchange-sha1,diffie-hellman-group1-
sha1,diffie-hellman-group14-sha1.
Password Authentication : enabled.
Hostbased Authentication : disabled.
RSA Authentication : disabled.
Vty Encryption HMAC Remote IP
DellEMC(conf)#
To disable SSH server functions, use the no ip ssh server enable command.
Using SCP with SSH to Copy a Software Image
To use secure copy (SCP) to copy a software image through an SSH connection from one switch to another, use the following
commands.
1. On Switch 1, set the SSH port number ( port 22 by default).
CONFIGURATION MODE
ip ssh server port number
2. On Switch 1, enable SSH.
CONFIGURATION MODE
copy ssh server enable
3. On Switch 2, invoke SCP.
CONFIGURATION MODE
copy scp: flash:
4. On Switch 2, in response to prompts, enter the path to the desired file and enter the port number specified in Step 1.
EXEC Privilege Mode
5. On the chassis, invoke SCP.
CONFIGURATION mode
copy scp: flash:
The following example shows the use of SCP and SSH to copy a software image from one switch running SSH server on UDP
port 99 to the local switch.
Other SSH related command include:
● crypto key generate : generate keys for the SSH server.
● debug ip ssh : enables collecting SSH debug information.
● ip scp topdir : identify a location for files used in secure copy transfer.
● ip ssh authentication-retries : configure the maximum number of attempts that should be used to authenticate a
user.
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