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Mastering IPv6 SLAAC Concepts and Configuration

Article Description

Some differences between IPv4 and IPv6 are more obvious than others. Sean Wilkins explains the new available methods for performing address configuration, how to implement DHCPv6 in IPv6, and the best options for stateless configuration. He also walks you through a detailed sample SLAAC configuration on a Cisco device to be sure you can apply what you’ve learned to your situation.


The usefulness of SLAAC in any given organization greatly depends on the tracking requirements; because SLAAC does not provide direct tracking the way a stateful DHCP server would, there is no quick way to determine which machine traffic is coming from without tracking the MAC addresses of the clients and calculating their created IPv6 address. This is further complicated by operating systems (like Windows 7) that use SLAAC data protection extensions by default, making tracking even harder, if not impossible, without looking at the addresses assigned to each device. SLAAC isn’t without a purpose, however. On many small networks there is no real need for this specific tracking and the use of SLAAC can simplify the addressing of machines and allow them to access public sites (with or without Network Address Translation (NAT)).