Have got a project to migrate the current EOL ( End of Life ) Cisco ASA 51XX series firewall. The Documentation for this is not enough to migrate seemlessly. A few links which can help to ease the pain while trying to configure via remote ( other country) .Click on the below link. ASA on a FTD 2100 https://www.cisco.com/c/en/us/td/docs/security/firepower/630/fdm/fptd-fdm-config-guide-630/fptd-fdm-mgmt.html#id_32969 https://www.cisco.com/c/en/us/support/docs/security/firepower-2100-series/213519-configure-fdm-firepower-device-manageme.html delete ipv6 command was the below: >configure network ipv6 delete it deletes the "router" ipv6 setting, along with the ipv6 mgmt configuration. For the migration from ASA to FTD, if you are doing it manually, please refer the config guide to get the steps to configure the required things: https://www.cisco.com/c/en/us/td/docs/security/firepower/640/fdm/fptd-fdm-config-guide-640.html For FXOS cli commands: https://www.cisco.com/c/en/...