We had an issue where our Intel X520-SR2 was dropping VLAN tagged traffic in
promiscuous mode. I am no driver developer and have a rudimentary knowledge of
linux kernels, so I took a hammer to the issue and got VLAN tagged traffic to
show up by making the following modifications to the ixgbe-3.9.15 source and
creating a new ixgbe.ko from that.
=====
--- ixgbe_main.c.orig 2012-05-23 18:31:34.000000000 +0000
+++ ixgbe_main.c 2012-05-23 19:12:13.000000000 +0000
@@ -4227,17 +4227,7 @@
ixgbe_irq_enable(adapter, true, true);
#endif
#ifdef HAVE_8021P_SUPPORT
-#ifdef HAVE_VLAN_RX_REGISTER
- bool enable = (grp || (adapter->flags & IXGBE_FLAG_DCB_ENABLED));
-#else
- bool enable = !!(features & NETIF_F_HW_VLAN_RX);
-#endif
- if (enable)
- /* enable VLAN tag insert/strip */
- ixgbe_vlan_stripping_enable(adapter);
- else
- /* disable VLAN tag insert/strip */
- ixgbe_vlan_stripping_disable(adapter);
+ ixgbe_vlan_stripping_disable(adapter);
#endif
}
@@ -4253,7 +4243,7 @@
*/
ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
#ifndef HAVE_8021P_SUPPORT
- ixgbe_vlan_stripping_enable(adapter);
+ /* ixgbe_vlan_stripping_enable(adapter); */
#endif
if (adapter->vlgrp) {
u16 vid;
=====
What is the proper way to disable VLAN stripping while in promiscuous mode? Is
it as simple as a modprobe ixgbe option that I'm missing or something else?
Thanks,
Angelo
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