IPv6 addressing in SMB environment

Martin Bernier has decided to open another can of IPv6 worms: how do you address multiple subnets in a very typical setup where you use a fi...

More real-life DHCPv6 Prefix Delegation gotchas

The murky details of IPv6 implementations never crop up till you start deploying it (or, as Randy Bush recently wrote : “ it is cheering to ...

DHCPv6 Prefix Delegation, RADIUS and Shared Usernames

Jernej Horvat sent me the following question: I know DHCPv6-based prefix delegation should be as stable as possible, so I plan to include t...

Coping with Holiday Traffic – Secondary DHCP Subnets

Years ago our IT assigned a /28 to my home office. It seemed enough; after all, who would ever have more than ~10 IP hosts at home (or more ...

IPv6 over PPPoE works great with IOS XE 3.7

Beatrice Ghorra ( @beebux ) was kind enough to share the results of her IPv6-over-PPPoE tests with me. Short summary: everything works as ...

Do we need DHCPv6 Relay Redundancy?

Instead of drinking beer and lab-testing vodka during the PLNOG party I enjoyed DHCPv6 discussions with Tomasz Mrugalski, the “master-of-las...

DHCPv6 Prefix Delegation with Radius works in IOS release 15.1

A while ago I described the pre-standard way Cisco IOS used to get delegated IPv6 prefixes from a RADIUS server . Cisco’s documentation alwa...

DHCPv6 server on Cisco IOS: making progress

DHCPv6 server on Cisco IOS got several highly useful enhancements since the first time I started looking into its behavior. Seems like most ...