On 5/31/2020 5:39 PM, Lev Serebryakov wrote: > Hello Ian, > > Thursday, May 28, 2020, 2:45:48 AM, you wrote: > >> I noticed that my VLAN interfaces stopped working after a recent build. >> tcpdump showed traffic leaving leaving and entering the interface but no >> host on the network actually received any packets from this host. A >> binary search led me to r360902 and indeed the following change fixed >> the issue for me: > Problem is, this change will return terrible situation when adding new VLAN > will flap connection status. > > It all worked before iflib: hardware VLAN filtering worked, and > adding/removing new VLAN didn't cause link to flap. > > Now, with iflib, looks like we can not have all good things at once :( Hi All, Just came across this thread as I am running into this behaviour on RELENG_12. Adding a new vlan causes all vlans on the parent interface to flap. Not the greatest thing as it bounces a LOT of traffic potentially, flaps routing etc. Is there a way around this ? This is on r367411 releng12 igb0_at_pci0:2:0:0: class=0x020000 card=0x153315d9 chip=0x15338086 rev=0x03 hdr=0x00 vendor = 'Intel Corporation' device = 'I210 Gigabit Network Connection' class = network subclass = ethernet eg. just something simple like ifconfig vlan16 create 10.1.2.3/29 vlandev igb1 vlan 16 # dmesg | tail -8 igb1: link state changed to DOWN vlan16: link state changed to DOWN vlan2049: link state changed to DOWN vlan15: link state changed to DOWN igb1: link state changed to UP vlan16: link state changed to UP vlan2049: link state changed to UP vlan15: link state changed to UP ---MikeReceived on Fri Nov 06 2020 - 18:17:47 UTC
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