Hi all, I would like to know is there any methods to monitor packets across a router? I know that I can use "debug ip packet" to monitor them, but it will generates a significant amount of output. In my environment: Server ---R1----R2----R3----- PC PC: 10.2.2.1 Server: 10.1.1.1 If I apply the access-list with debug command in R3 and PING from PC to Server, it can display all packets. However, when I apply them in R2 and PING again, nothing display. Can anyone help me? The access-list and debug command are as follow: Router(config)#access-list 150 permit ip host 10.2.2.1 host 10.1.1.1 Router(config)#access-list 150 permit ip host 10.1.1.1 host 10.2.2.1 Router#debug ip packet 150 detail Router#terminal monitor Thanks. dovelet _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]