I have a cisco 2811. I need a tool that can create reports of traffic analysis. I have seen that exists websense but is a payment tool and I need if could be a free software to monitor traffic of every ip and possible attacks to firewallThanks

I have a cisco 2811 with 2 ADSL (2 wics) and some computer use one adsl and other computer other adsl, and I like to know it it' is possible that when automatically when 1 adsl fails then all traffic goes with other adsl, like a backupIt is possible ...