https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260260
--- Comment #4 from Marek Zarychta <zarych...@plan-b.pwste.edu.pl> --- I was told to update the PR with some em vs igb details, so TL;DR: 1. em(4) works like before with the same MTU 9000 on parent em(4), lagg(4) and vlan(4) with the options: VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWFILTER enabled. 2. igb(4) doesn't work this way and with options: VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWFILTER,VLAN_HWTSO enabled, the size of vlan(4) MTU has to be lowered by 4 bytes to unbreak receiving jumbo frames. -- You are receiving this mail because: You are the assignee for the bug.