pattern recognition

machine learning,

statistics

s (RAs) are sent for the HSRP virtual IPv6 link-local address when the HSRP group is active.

ne router is elected as the virtual router master, with the other routers acting as backups, in case the virtual router master fails.

nd a virtual IPv6 link-local address derived from the HSRP virtual MAC address

y default, the router with the numerically highest IPv4 address is elected as the active router.

priority can be used to determine the active router. The router with the highest HSRP priority will become the active router

Note: With preemption disabled, the router that boots up first will become the active router if there are no other routers online during the election process.

Note: DHCPv6 is defined in RFC 3315.

ulticast all-DHCPv6-servers address of ff02::1:2.

s multicast address has link-local scope, which means routers do not forward the messages to other networks.

The Internet Engineering Task Force (IETF) recommends that DAD is used on all IPv6 unicast addresses regardless of whether it is created using SLAAC only, obtained using stateful DHCPv6, or manually configured.

This is used to identify the network/host portion of the IPv4 address.

the IETF does not consider private IPv4 addresses or NAT as effective security measures.

n IPv6 router sends ICMPv6 RA messages to the all-node multicast group.

This has the same effect as a broadcast address in IPv4.