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Cisco 2621 SSH Version Question


Hello again, I am running a Cisco 2621 router with iOS version 12.3(24) and I would like to set up SSH version 2, however, I see only version 1.5 is installed.  Is SSH version 2, or 1.99 available on this version of iOS? I have googled and have not come up with a solid answer.  Thanks so much!

16 Replies 16

  • SSH Version 2.0 (SSH v2) support was introduced in Cisco IOS platforms and images start in Cisco IOS Software Release 12.1(19)E.

show ip ssh <<- share this 

Can you point me to a configuration guide for SSH version 2 please?

I have followed the setup procedure as described in the link, and have set up SSH 1.5 successfully, but it is only version 1.5.  If I type:#ip ssh version 2, i get an error as follows:


router#ip ssh version 2
% Invalid input detected at '^' marker.

What am I doing wrong?

carter(config)#ip ssh version 2

you must enter the conf t mode then config the SSH version

Tried that, this is what I am seeing:

gateway1#conf t
Enter configuration commands, one per line. End with CNTL/Z.
gateway1(config)#ip ssh version 2
% Invalid input detected at '^' marker.

can you share this 
gateway1(config)#ip ssh version ?

gateway1(config)#ip ssh ver
% Invalid input detected at '^' marker.

gateway1(config)#ip ssh ?
authentication-retries Specify number of authentication retries
break-string break-string
logging Configure logging for SSH
port Starting (or only) Port number to listen on
rsa Configure RSA keypair name for SSH
source-interface Specify interface for source address in SSH
time-out Specify SSH time-out interval

This is all I get....

can I see 
show version 

Secure Shell Version 2 Support (

  • Before configuring SSH, ensure that the required image is loaded on your device. The SSH server requires you to have a k9 (Triple Data Encryption Standard [3DES]) software image depending on your release.

gateway1#show version
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IK9O3S3-M), Version 12.3(24), RELEASE SOFTWARE (fc4)
Technical Support:
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Thu 18-Oct-07 14:26 by stshen
Image text-base: 0x80008098, data-base: 0x81A1E1E8

ROM: System Bootstrap, Version 12.2(6r), RELEASE SOFTWARE (fc1)

gateway1 uptime is 37 minutes
System returned to ROM by reload
System image file is "flash:c2600-ik9o3s3-mz.123-24.bin"

Cisco 2600 Series - Cisco IOS Release 12.2(2)XA - Cisco



this image is 3DES version, I will check why command version not appear 


This command was introduced.

ip ssh version [1 | 2]

Cisco IOS Security Command Reference: Commands D to L - ip source-track through ivrf [Support] - Cisco

this command introduced in 12.3(4)

Thanks for your patience and help sir! I really appreciate it.  Is it possible for me to install version 12.3(4) on this model?

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