[Bug 241785] [vlan][lagg] creating vlan over lagg causes flapping

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241785

            Bug ID: 241785
           Summary: [vlan][lagg] creating vlan over lagg causes flapping
           Product: Base System
           Version: 12.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: konrad.kreciwilk at korbank.pl

Hello,

Starting of 12-STABLE (I do not know revision numer) up to 12.1-RELEASE I
notice a problem with vlans over laggport. I have INTEL 82599 (ix0, ix1) and
create a lagg(LACP):

root@:~ # ifconfig lagg0 create
root@:~ # ifconfig lagg0 laggproto lacp laggport ix0 laggport ix1

and vlans:
root@:~ # ifconfig vlan3960 create
root@:~ # ifconfig vlan3960 vlan 3960 vlandev lagg0

ifconfig output:

ix0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
       
options=e53fbb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether a0:36:9f:1d:db:4c
        media: Ethernet autoselect (10Gbase-Twinax
<full-duplex,rxpause,txpause>)
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
ix1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
       
options=e53fbb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether a0:36:9f:1d:db:4c
        hwaddr a0:36:9f:1d:db:4e
        media: Ethernet autoselect (10Gbase-Twinax
<full-duplex,rxpause,txpause>)
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x7
        inet 127.0.0.1 netmask 0xff000000
        groups: lo
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=e53fbb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether a0:36:9f:1d:db:4c
        laggproto lacp lagghash l2,l3,l4
        laggport: ix0 flags=1c<ACTIVE,COLLECTING,DISTRIBUTING>
        laggport: ix1 flags=1c<ACTIVE,COLLECTING,DISTRIBUTING>
        groups: lagg
        media: Ethernet autoselect
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
vlan3960: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6>
        ether a0:36:9f:1d:db:4c
        inet 212.127.xx.xx netmask 0xfffffffc broadcast 212.127.92.255
        groups: vlan
        vlan: 3960 vlanpcp: 0 parent interface: lagg0
        media: Ethernet autoselect
        status: active
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>

next, creating new vlan causes a port flapping (ix0,ix1 and whole lagg0):

root@:~ # ifconfig vlan100 create
root@:~ # ifconfig vlan100 vlan 100 vlandev lagg0

root@:~ # ifconfig vlan200 create
root@:~ # ifconfig vlan200 vlan 200 vlandev lagg0

dmesg output:

vlan3960: link state changed to UP
ix0: link state changed to DOWN
ix1: link state changed to DOWN
lagg0: link state changed to DOWN
vlan3960: link state changed to DOWN
vlan100: link state changed to DOWN
ix0: link state changed to UP
ix1: link state changed to UP
lagg0: link state changed to UP
vlan3960: link state changed to UP
vlan100: link state changed to UP
ix0: link state changed to DOWN
ix1: link state changed to DOWN
lagg0: link state changed to DOWN
vlan3960: link state changed to DOWN
vlan100: link state changed to DOWN
vlan200: link state changed to DOWN
ix0: link state changed to UP
ix1: link state changed to UP
lagg0: link state changed to UP
vlan3960: link state changed to UP
vlan100: link state changed to UP
vlan200: link state changed to UP

Its happend for example on 12.0-STABLE #0 r344658M, 12.1-RELEASE. I use a
diffrent hardware, only networkcard (based on INTEL 82599 chipset) is the same.

-- 
You are receiving this mail because:
You are the assignee for the bug.