We are in the process of replacing our router due to obsolesence and due to the increased resource load on it over the years. We currently have an older Cisco 3640 router running IOS (C3640-I-M), Version 12.2(3), and use ACL's extensively in an attempt to prevent attacks, intrusions, etc. from entering this network. Currently it has grown to approximately 300 line items in our ACL list, so you can see that a 3640 router will no longer keep up with the traffic. We have recently purchased a Cisco3845-Sec/K9 router with advanced security S384ASK9-12403 IOS firewall package. It is currently running Cisco IOS Software, 3800 Software (C3845-ADVSECURITYK9-M), Version 12.4(3f), RELEASE SOFTWARE (fc3).
My question is if there is an easy way to take my 300 item ACL list from my old 3640 routers and convert it to a new ACL list for the 3845 router? Or should I just start from scratch? Is there any good documentation out there to get me started in the design for the firewall rules, so I can take our old 3640 list and convert it to the 3845 rule list?