Dear Sir!
My colleague attempted to pass CCIE R/S lab a few time ago in San Paulo, Brazil. There are IOS 12.1.5T - deffered release!!! only in all of routers (except 3550, of course). And there were some mistakes in 12.1.5T, because some portion of exercise don't run at 12.1.5T, but run with 12.2 in our laboratory.
My Q: is there are any capability to change IOS version during CCIE lab from DEFFERED releases to normal 12.1 which REALLY working?
Best regards,
Nick