Hi I passed the CCNA 5 months ago and now would like to start on the CCNP BSCI. I have 3 X 2500 routers and 1 3550 Switch. Can I use these and a few books to self study for the exam? I know the IOS is not up to date because of the memory of the 2500 routers. So my question is, is what I have sufficient if not what at minimum hardware do I need to efficiently and successfully self study for the BSCI.