FreeBSD 10.2 - LAGG interfaces "possible flapping" during shutdown

[Dean Forester]

Hi

I am having an issue with a new FreeBSD 10.2-RELEASE system when using LAGGs. Everything works fine until I try to do a reboot of the system. With this issue the system does a shutdown but reports an error with the interfaces that belong to the LAGG (which also have VLANs define) and then halts, it will not reboot; a power cycle is required.

root at Pine:~ # uname -a
FreeBSD Pine.local 10.2-RELEASE FreeBSD 10.2-RELEASE #0 r286666: Wed Aug 12 15:26:37 UTC 2015     root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

/etc/rc.conf:
if_vlan_load="YES"
# HP V1910-24G Switch Trunk
ifconfig_igb1="up mtu 1500"
ifconfig_igb4="up mtu 1500"
ifconfig_igb7="up mtu 1500"
ifconfig_igb8="up mtu 1500"
# Setup new Virtual Interfaces
cloned_interfaces="lagg1 vlan101 vlan102 vlan103"
# LAGG Configuration
ifconfig_lagg1="laggproto lacp laggport igb1 laggport igb4 laggport igb7 laggport igb8"
# Setup VLANs
ifconfig_vlan101="inet 192.168.1.208/24 vlan 101 vlandev lagg1"
ifconfig_vlan102="inet 192.168.2.208/24 vlan 102 vlandev lagg1"
ifconfig_vlan103="inet 192.168.3.208/24 vlan 103 vlandev lagg1"
# Setup extra IPs for Layer 3 Load Balancing
ifconfig_vlan101_aliases="inet 192.168.1.209/32"
ifconfig_vlan102_aliases="inet 192.168.2.209/32"
ifconfig_vlan103_aliases="inet 192.168.3.209/32"





















Errors on shutdown -r now


... 


Uptime: 3d20h44m15sigb8: Interface stopped DISTRIBUTING,
possible flapping

igb1: Interface stopped DISTRIBUTING,
possible flapping

igb7: Interface stopped DISTRIBUTING,
possible flapping

igb4: Interface stopped DISTRIBUTING,
possible flapping






Has anyone else run into this behavior with LAGGs and VLANs? Any help would greatly be appreciated.

Regards,

Dean Forester
dean_forester at hotmail.com