Hi guys.

I was wondering if someone might be able to advise me how impossible it would be to do CCIE straight off without CCNA/CCNP experience ?
I'm a fairly intelligent person, with years of network/unix/security experience, but not really any Cisco. ( I've used other switches and routers - sacrilidge I know ! ) And quite a quick study, but all the same I don't really want to work (or pay !) my way through CCNA then CCNP.
Any advice would be welcome.
Many Thanks,
Si