Daily Archives: March 3, 2018

SSH Issue with Cisco Switch

So Today i wanted to login to my old Cisco Switch 2960 from my Suse Linux when i received the following error:

ERROR:
Unable to negotiate with 10.1.1.1 port 22: no matching key exchange method found. Their offer: diffie-helman-group1-sha1
Note**: 10.1.1.1 is ip of my switch with username salman

SOLUTION:
1) Make sure you configure ssh keys with 1024 bits when setting it up in the switch
2) From your Linux machine issue the following command:

# ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 salman@10.1.1.1

Tip**: For Debugging SSH,  use ssh -vvv option.

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