Overview

Source Address Validation (SAVI) is applied on access devices. SAVI creates a table of bindings between addresses and ports through other features such as ND snooping, DHCPv6 snooping, and IP Source Guard, and uses those bindings to check the validity of the source addresses of DHCPv6 protocol packets, ND protocol packets, and IPv6 data packets.

SAVI can be used in the following address assignment scenarios:

• DHCPv6-only—Hosts connected to the SAVI-enabled device obtain addresses only through DHCPv6.

• SLAAC-only—Hosts connected to the SAVI-enabled device obtain addresses only through Stateless Address Autoconfiguration (SLAAC).

• DHCPv6+SLAAC—Hosts connected to the SAVI-enabled device obtain addresses through DHCPv6 and SLAAC.