Cisco 300 Series Administration Manual page 452

Managed switch

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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, the links SwitchC-H3, SwitchB-H4, and SwitchA-SwitchD on

form the perimeter, while links SwitchA-SwitchB, SwitchB-SwitchC, and SwitchA-

R1 are inner links inside the protected area.

Figure 7 IPv6 First Hop Security Perimeter

Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)

Security: IPV6 First Hop Security

First Hop Securit Overview