https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292759
--- Comment #9 from [email protected] ---
(In reply to Zhenlei Huang from comment #8)
yep, looks like in promisc it filters vlans:
# ifconfig igb1 vlanhwfilter up
# ifconfig igb1 promisc
# tcpdump -Kpenvi igb1 vlan 20
tcpdump: listening on igb1, link-type EN10MB (Ethernet), snapshot length 262144
bytes
^C
0 packets captured
301 packets received by filter
0 packets dropped by kernel
# ifconfig igb1 -vlanhwfilter
# tcpdump -Kpenvi igb1 vlan 20
tcpdump: listening on igb1, link-type EN10MB (Ethernet), snapshot length 262144
bytes
17:18:10.786218 00:a0:98:1b:f4:df > ff:ff:ff:ff:ff:ff, ethertype 802.1Q
(0x8100), length 60: vlan 20, p 0, ethertype ARP (0x0806), Ethernet (len 6),
IPv4 (len 4), Request who-has 192.168.20.88 tell 192.168.20.2, length 42
17:18:11.849720 00:a0:98:1b:f4:df > ff:ff:ff:ff:ff:ff, ethertype 802.1Q
(0x8100), length 60: vlan 20, p 0, ethertype ARP (0x0806), Ethernet (len 6),
IPv4 (len 4), Request who-has 192.168.20.88 tell 192.168.20.2, length 42
17:18:12.872401 00:a0:98:1b:f4:df > ff:ff:ff:ff:ff:ff, ethertype 802.1Q
(0x8100), length 60: vlan 20, p 0, ethertype ARP (0x0806), Ethernet (len 6),
IPv4 (len 4), Request who-has 192.168.20.88 tell 192.168.20.2, length 42
^C
3 packets captured
19 packets received by filter
0 packets dropped by kernel
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