Start Capturing Packets; Define Filters For Capturing Data Traffic - Digi IX14 User Manual

Diagnostics

Start capturing packets

To start capturing packets:
1. Set the interfaces for capturing packets using the
command. For example, to capture data on the ethernet and cellular interaces:
# analyzer interfaces eth0 wwan0
To display the available interfaces, enter the
without any options:
# analyzer interfaces
1.eth0 [Up, Running]
2.wwan0 [Up, Running]
3.any (Pseudo-device that captures on all interfaces) [Up, Running]
4.lo [Up, Running, Loopback]
5.nflog (Linux netfilter log (NFLOG) interface)
6.nfqueue (Linux netfilter queue (NFQUEUE) interface)
7.usbmon1 (USB bus number 1)
Enter an available interface or the keyword any to capture packets from all interfaces.
3. Start capturing packets by setting the
# analyzer state on
Starting network analyzer
WARNING! Capturing data using analyzer can significantly affect device
performance.
4. To stop capturing data, turn off the
# analyzer state off
Stopping network analyzer
1 packet captured
1 packet received by filter
0 packets dropped by kernel
27 packets captured
27 packets received by filter
0 packets dropped by kernel
You can capture up to 10 MB of data traffic in two 5 MB files per interface.
Note Data traffic is captured to RAM and the captured data is lost when the device reboots unless you
save the data to a file. See

Define filters for capturing data traffic

To filter captured data, use the
# analyzer filter ip host 192.168.1.1
See http://www.tcpdump.org/manpages/pcap-filter.7.html
Digi IX14 User Guide
Analyze network traffic
Analyze network traffic
Analyze network traffic
Save captured data traffic to a
Analyze network traffic
Analyze network traffic
Analyze network traffic interfaces
interfaces command
state to on:
state:
file.
filter command. For example:
for more information on analyzer filters.
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