NFSROOT and lagg(4)

[Sean Bruno]

"what I want" is to pxe/netboot and then switch over to using a lagg(4)
interface that includes the interface used in the pxe/netboot boot up.
I suspect, I have to switch to MDROOT to do this, but I thought I'd ask
if anyone is doing this type of configuration in their labs?

What seems to happen is that I lose the nfsroot when I reconfigure the
lagg, and I no longer have access to reconfigure.

e.g. pxeboot from em0, then reconfigure networking to use em0/em1 in lagg0:

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

options=5259b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO>
        ether 00:30:18:c5:0a:a9
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

options=5259b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO>
        ether 00:30:18:c5:0a:a9
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active
lagg0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500

options=5259b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,LRO,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO>
        ether 00:30:18:c5:0a:a9
        inet 192.168.100.53 netmask 0xffffff00 broadcast 192.168.100.255
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect
        status: active
        groups: lagg
        laggproto lacp lagghash l2,l3,l4
        laggport: em0 flags=1c<ACTIVE,COLLECTING,DISTRIBUTING>
        laggport: em1 flags=1c<ACTIVE,COLLECTING,DISTRIBUTING>

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