Hi all,
I have quad-port Intel ET2 NIC based on 82576[1] controller. The manual
says that hardware VLAN tagging should be supported but ifconfig output
shows VLAN_MTU only in hwfeatures on OpenBSD 7.0. How do I check if 802.1Q
tagging is offloaded or not? And if it's not - does it matter at 1Gbps
speeds on 3 Ghz CPU?
$ dmesg | grep em0
em0 at pci11 dev 0 function 0 "Intel 82576" rev 0x01: msi, address
90:e2:ba:84:64:14
$ ifconfig em0 hwfeatures
em0: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,AUTOCONF4> mtu 1500
hwfeatures=10<VLAN_MTU> hardmtu 9216
lladdr 90:e2:ba:84:64:14
index 1 priority 0 llprio 3
media: Ethernet autoselect (1000baseT full-duplex,rxpause,txpause)
status: active
inet 192.168.0.143 netmask 0xffffff00 broadcast 192.168.0.255
[1]
https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/gigabit-et-et2-ef-multi-port-server-adapters-brief.pdf
Thanks,
Yury.
