I am experiencing a high amout of underrun packet drops for egress traffic out my inside interface on a ASA 5520 (avg 10 packet drops p/sec). I am not completely clear on the understanding of underruns, but my understanding is that the harware is working faster the the software processing. I am hoping someone can give me a few suggestions as to where I should look for my problems, or what typically leads to this type of performance. I am sure traffic patterns matter in this type of situation, and I have about 50Mbps sustained traffic ingress on my Untrusted port, and 60-70 MBps ingress on my DMZ port. Traffic peaks at higher rates, those are just daily averages. Do I need to move up models? Thanks so much for your help.