Cisco FTD: Performance issues with devices on 7.0.1 code

On several occasions, I’ve confirmed FTD 1k and 2k platforms having performance issues routing and inspecting traffic and even crashing (Cisco bug reported) on 7.0.1 code revision. It was confirmed on 1120 and 2110. One interesting find is it did not affect FTD 1010 platform and potentially a setup with a single Internet connection.

So if you see issues like people constantly losing connectivity over S2S VPN, Anyconnect freezing up and reconnecting on the user PC, and voice quality issues to services like Zoom or Skype and you are running 7.0.1 code then try downgrading to 6.7.0.2. In my case it always resolved the issues. If you upgraded to 7.0.1 for the VPN tunnel backup feature it still works on 6.7.0.2.