Cisco SX350 Series Administration Manual page 557

25 Security: IPv6 First Hop Security
IPv6 First Hop Security Overview
IPv6 First Hop Security Perimeter
IPv6 First Hop Security switches can form a perimeter separating untrusted area from trusted
area. All switches inside the perimeter support IPv6 First Hop Security, and hosts and routers
inside this perimeter are trusted devices. For example, in Figure 2 Switch B and Switch C are
inner links inside the protected area.
Figure 2 IPv6 First Hop Security Perimeter
541 Cisco Sx350, SG350X, SG350XG, Sx550X & SG550XG Series Managed Switches, Firmware Release 2.2.5.x