Hi
I propose myself to help you out with this project. I assume that you are trying to do this on a physical laboratory. We could use BackTrack to do the attacks and do some configuration on Cisco Routers to mitigate them.
However, the best device for avoiding this attacks for cisco infrastructure is an ASA, don't know if we can put this device on the laboratory.
By the way, I'm a little bit new at this thing of the freelance world, that's why you won't see no rating for me yet. But I got plenty of experience on this field. I worked for a Regional Company on Central America that is partner with Cisco and it is obligatory to certificate ourselfe.
I'm a CCNP in progress guy, missing one Exam to achieve my certification, but my experience is working mostly with Cisco Switches, ASA, WLC, Acess Points, Next Generation Firewalls and Routers.
Hope this information help you to make a possitive decision about me.
Best Regards
Alvaro Rugama
P.S. sorry for my english, that's not my native language