Hi there, I can help with your project. We can graph the router interface traffic via SNMP, which mean we need to a NMS such as cacti.
About me, I have 4 years experience working in IT/Network related industry, currently a CCNP RS, working on projects in various scale (Enterprise/Service Provider).
Feel free to contact me or check out my profile if you need to know more.
Looking forward to hearing from you soon :)
Regards,
Ridel