Many Thanks Dameon; however the command is not available in clish (note this is VSX gateway)
fw1> add interface lo loopback 10.1.1.1 255.255.255.255
CLINFR0329  Invalid command:'add interface lo loopback 10.1.1.1 255.255.255.255'
fw1> add
aaa              - Authentication authorization and accounting
allowed-client   - Add allowed client
arp              - Add ARP entries
backup           - Start a backup of the system
backup-scheduled - Determine the type of scheduled-backup of the system
bonding          - Configure bonding interfaces
cloning-group    - Configure Gaia Cloning Group
command          - Add extended command.
cron             - Add new scheduling for a command
dhcp             - Configure or view DHCP settings.
group            - Specify group name
host             - Static host configuration
netflow          - NetFlow export of traffic information
rba              - Role-based administration configuration
snapshot         - Take snapshot
snmp             - Simple Network Management Protocol Information
syslog           - System log configuration
upgrade          - Upgrade of Check Point OS and Products
user             - A user name
vpn              - vpn configuration
Any ideas for VSX ?
Also what about the blackhole route piece ?