Does the Intel XL710 4x10GE card support the processing of VLAN frames that have are tagged with STAGs (TPID == 0x88a8) instead of CTAGs (TPID == 0x8100)? In my lab, I have tried a number of things to enable the processing of STAG frames on the XL710 board, including setting up the ethernet interface with commands such as the one below, but no luck, the interface will still not see the VLAN frames with a TPID of 0x88a8. Frames tagged with CTAGs are processed just fine however.
$ sudo ip link add link enp1s0f0 name enp1s0f0.4004 type vlan protocol 8021.ad id 4004
Also, I have tried to setup the board in both promiscuous mode and true promiscuous mode. Again, no joy, the board still refuse to detect/receive a VLAN tagged frame if the TPID is 0x88a8 instead of 0x8100. By the way, for true promiscuous mode, I am using this command.
$ sudo ethtool --set-priv-flags enp1s0f0 vf-true-promisc-support on
I have the latest Intel firmware installed on this board and am using the latest Intel kernel module for this board.
$ sudo ethtool -i enp1s0f0
[sudo] password for nknuth:
driver: i40e
version: 1.5.16
firmware-version: 5.04 0x800024ca 0.0.0
expansion-rom-version:
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes
Alas, when I query the features of this ethernet board, it seems clear that STAG frames are not supported.
$ sudoethtool -k enp1s0f0
...
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
...
Any help is appreciated. It really is a show stopper for my company to not be able to process STAGs on the XL710 boards. We were using the 2 port 10GE boards that use the ixgbe kernel module and STAG frames were processed on those boards without issue.
Thanks in advance for any clarity here.
Nathan