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How to use CLI command to perform packet trace?
1. If you only need to check the packet flow on CLI command console, you can type,
Router> packet-trace interface wan1*
*the interface name, even pppoe interface, you can only use interface name
For example: packet-trace interface wan1_ppp
2. If you need to collect packets from CLI command line and need to download a packet trace file, please follow these steps.
a. Router>configure terminal
b. Router(config)# packet-capture configure
c. Router(packet-capture)# iface add wan1*
*you can add any interface name to the collect list, for example, if you want to listen to wan1 and wan1_ppp, you can type
Router(packet-capture)# iface add wan1 (press enter)
Router(packet-capture)# iface add wan1_ppp (press enter)
d. Router(packet-capture)# exit
leave config terminal.
e. Router(config)# show packet-capture config
This step is to check packet trace configuration.
f. Router(config)# packet-capture activate
start packet trace
g. Router(config)# no packet-capture activate
stop packet trace
h. Router(config)# dir /packet_trace/
packet trace file will be saved in this folder (/packet_trace)
i. Then you can use FTP to log into the USG to get this file.
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