Edit: This topology has been deprecated and replaced by a similar but simpler topology used in INE's CCIE SPv3 Lab Workbook. More information about this topology is available here.
Per the request of many candidates, I've finished putting the final touches on the hardware topology that will be used for our new CCIE SPv3.0 Advanced Technologies Class and Workbooks. The topology consists of 20 routers - 2 of which are IOS XR 3.9.1, 6 of which are 7200VXRs, and 12 of which are 2600XMs - and 2 Catalyst ME3400 switches.
If you are interested in beta testing any of the content I'm working on for the upcoming CCIE SPv3 Advanced Technologies Class or CCIE SPv3 Workbook email me at firstname.lastname@example.org with the subject line CCIE SPv3 Beta. More details of the class, workbook, and rack rentals will be posted in the coming weeks.