Identifying DoS-attacked IP address(es)

Hi, How do you identify a DoS-attacked IP address(es) on your ingress border router, assuming the latter is a Cisco 12000 ? I used to use ip accounting but they removed it from the S-code. Thanks, André --------------------- Andre Chapuis IP+ Engineering Swisscom Ltd Genfergasse 14 3050 Bern +41 31 893 89 61 chapuis@ip-plus.net CCIE #6023 ----------------------