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tcpdump vlan capture tag priority
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#!/bin/sh | |
# VLANID is 10 | 0xa | |
# VLANID is 20 | 0x14 | |
# VLANID is 3342 | 0x0d0e | |
# VLANID is 3340 | 0x0d0c | |
# https://www.binaryhexconverter.com/hex-to-binary-converter | |
# https://www.tcpdump.org/manpages/pcap-filter.7.html | |
# filter by VLAN 20 & prio 0 | |
tcpdump -i eno1 -n -w - -s 50 | tcpdump -r - -n 'ether[14:2] == 0x0014' -e -xx | |
# filter by VLAN 10 & prio = 6 | |
# vlan 10 = 0x0a | |
tcpdump -i bond4 -n -w - -s 50 | tcpdump -r - -n 'ether[15] == 0xa && ether[14] >> 5 = 6' -e -xx -c 100 |
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