I am using Cisco Packet Tracer 5.2 for study, it seem to be good.
I have configure Intervaln routing on 3 coreswitches which is workign fine with vast topology. I tried to place one router 2811 as a firewall between my wan and lan. But i am not able to ping from router to core switch
Please suggest configuration for either i want to connect router directly to coreswitch i.e. wan to lan network configuration.
Software/Hardware used: router 2811 and Cisco 3560 switch