no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

Unable to ssh into EXOS network switch from ssh Jumphost, the error Message on the SSH Client is....

Unable to negotiate with ip on  port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1

The reason for the above error is because the support for diffie-hellman-group1-sha1 had been removed from OpenSSH and other SSH libraries by default.  Try to upgrade your switch firmware and see if that solves your problem. 

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