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Cisco Bug: CSCvt27613 - UCS-FI-6454-U with firmware 4.1(1a) key exchange algorithm error diffie-hellman-group16-sha512

Last Modified

Sep 02, 2020

Products (1)

  • Cisco Unified Computing System

Known Affected Releases


Description (partial)

On FI-6454, when the firmware is upgraded to 4.1(1a), ssh clients softwares like putty and mobaterm can't connect to both FIs. The error message "Couldn't agree a key exchange algorithm (available: diffie-hellman-group16-sha512)" is raised.

This symptom is observed when trying to connect through ssh using Putty or Mobaterm on UCS-FI-6454-U running firmware 4.1(1a).

Client software versions:
Mobaterm Personal Edition v20.0 Build 4286
Putty Release 0.73
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