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Chapter 50 SAVI Configuration
50.1 Introduction to SAVI
SAVI (Source Address Validation Improvement) is a security authentication method that
provides the granularity level of the node source address. It gets the trust node information
(such as port, MAC address information), namely, anchor information by monitoring the
interaction process of the relative protocol packets (such as ND protocol, DHCPv6 protocol)
and using CPS (Control Packet Snooping) mechanism. After that, it binds the anchor
information with the node source address and sends the corresponding filter rules, allow the
packets which match the filter rules to pass only, so as to reach the aim that check the validity
of node source address.
SAVI function includes ND Snooping function, DHCPv6 Snooping function and RA Snooping
according to the protocol packet type. ND Snooping function is used to detect ND protocol
packet, it sets IPv6 address binding obtained by nodes with the stateless address
configuration. DHCPv6 Snooping function is used to detect DHCPv6 protocol packet, it sets
IPv6 address binding obtained by nodes with the stateful address configuration. RA Snooping
function is used to avoid the lawless node sending the spurious RA packet.
50.2 SAVI Configuration
SAVI configuration task list:
Enable or disable SAVI function
Enable or disable application scene function for SAVI
Configure SAVI binding function
Configure the global max-dad-delay for SAVI
Configure the global max-dad-prepare-delay for SAVI
Configure the global max-slaac-life for SAVI
Configure the lifetime period for SAVI bind-protect
Enable or disable SAVI prefix check function
Configure IPv6 address prefix for a link
Configure the filter entry number of IPv6 address
Configure the check mode for SAVI conflict binding
Enable or disable user authentication
Enable or disable DHCPv6 trust of port
Enable or disable ND trust of port
Configure the binding number
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