The device is available and active.
Gray square - Ingress
The associated interface is for ingress traffic.
Gray square - Egress
The associated interface is for egress traffic.
The device status is either unavailable or has not yet been
collected by the SFC controller.
Blue square - IP
The SF is of type IP. Can also show type Pool or Virtual.
The device is available but is part of a Sync-Failover device
group, and is in Standby mode
The device is offline.