James Mason's Blog -or- The Journal of Contemporary Lunacy

Sett ing up a 6to4 tunnel will allow IPv6 (or dualstack) hosts on network s that only have P ublic IPv4 addresses to access sites and services that are available via IPv 6. The main steps are calculating the IPv6 version of your Public IPv4 address ; establishing a 6 to4 tunnel to one of the free I Pv6 relays available; and configuring the local network to route IPv 6 via th e tunnel . Overv iew of the Topolog y       

For a little bit of extra practice before the CCNA exam, I hooked up a small lab with a couple switches bridged to emulated routers (running under GNS3 on the laptop). The reason for the multiple trunks between the switches was to test out Spanning Tree. I was going to setup link aggregation as well, but the 3500XL didn't want to play ball. I found out later that it doesn't support PAgP or LACP , so the method for setting up aggregation is different. VTP and CDP worked properly overly the bridged link - as they should, but I was expecting something to go wrong for some reason (pessimism?). Minicom also played ball with the USB-to-serial adapter (for the console cable), which is always handy too :)