U-Boot dub-2015.04-r4.7 (Sep 13 2016 - 14:52:25)

CPU: Freescale i.MX6UL rev1.1 528 MHz (running at 396 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 46C
Reset cause: POR
I2C: ready
DRAM: 256 MiB
MCA: HW_VER=1 FW_VER=0.8
PMIC: PFUZE300 DEV_ID=0x30 REV_ID=0x11
NAND: 256 MiB
MMC: FSL_SDHC: 0
In: serial
Out: serial
Err: serial
ConnectCore 6UL SOM variant 0x02: Industrial Ultralite 528MHz, 256MB NAND, 256MB DDR3, -40/+85C, Wireless, Bluetooth
Board: ConnectCore 6UL StarterBoard, version 2, ID 129
Net: FEC0
Hit any key to stop autoboot: 0
UBI: attaching mtd1 to ubi0
UBI: scanning is finished
UBI: attached mtd1 (name "mtd=3", size 14 MiB) to ubi0
UBI: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
UBI: VID header offset: 2048 (aligned 2048), data offset: 4096
UBI: good PEBs: 112, bad PEBs: 0, corrupted PEBs: 0
UBI: user volume: 0, internal volumes: 1, max. volumes count: 128
UBI: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 0
UBI: available PEBs: 68, total reserved PEBs: 44, PEBs reserved for bad PEB handling: 40
Error reading superblock on volume 'ubi0:linux' errno=-19!
ubifsmount - mount UBIFS volume

Usage:
ubifsmount <volume-name>
- mount 'volume-name' volume
=> print
arch=arm
baudrate=115200
board=ccimx6ulstarter
board_id=129
board_name=ccimx6ulstarter
board_version=2
boot_fdt=yes
bootargs_linux=cma=96M
bootargs_nand_linux=setenv bootargs console=${console},${baudrate} ${bootargs_linux} ${mtdparts} ubi.mtd=${mtdlinuxindex} ubi.mtd=${mtdrootfsindex} root=ubi1_0 rootfstype=ubifs rw ${bootargs_once} ${extra_bootargs}
bootargs_recovery=setenv bootargs console=${console},${baudrate} androidboot.hardware=ccimx6ulstarter androidboot.console=${console}${mtdparts} ${bootargs_once} ${extra_bootargs}
bootcmd=if run loadscript; then source ${loadaddr};fi;
bootdelay=1
bscantest=PASS
btaddr=00:40:9D:98:AB:B5
console=ttymxc4
cpu=armv7
eth1addr=00:40:9D:98:AB:B3
ethact=FEC0
ethaddr=00:40:9D:98:AB:B2
ethprime=FEC
fdt_addr=0x83000000
fdt_file=zImage-imx6ul-ccimx6ulstarter.dtb
fdt_high=0xffffffff
initrd_addr=0x83800000
initrd_file=uramdisk.img
initrd_high=0xffffffff
install_linux_fw_sd=if load mmc 0 ${loadaddr} install_linux_fw_sd.scr;then source ${loadaddr};fi;
ipaddr=192.168.42.30
linux_file=core-image-base-ccimx6ulstarter.boot.ubifs
loadaddr=0x80800000
loadscript=if ubi part linux; then if ubifsmount ubi0:linux; then ubifsload ${loadaddr} ${script};fi;fi;
module_variant=0x02
mtddevname=bootloader
mtddevnum=0
mtdids=nand0=gpmi-nand
mtdlinuxindex=3
mtdparts=mtdparts=gpmi-nand:3m(bootloader),1m(environment),1m(safe),14m(linux),14m(recovery),128m(rootfs),-(update)
mtdrootfsindex=5
netmask=255.255.0.0
partition=nand0,0
recovery_file=recovery.img
recoverycmd=if ubi part recovery; thenif ubifsmount ubi0:recovery; thenubifsload ${loadaddr} ${zimage};ubifsload ${fdt_addr} ${fdt_file};ubifsload ${initrs_addr} ${initrd_file};run bootargs_recovery;bootz ${loadaddr} ${initrd_addr} ${fdt_addr};fi;fi;
rootfs_file=core-image-base-ccimx6ulstarter.ubifs
rootpath=/exports/nfsroot-ccimx6ulstarter
script=boot.scr
serverip=192.168.42.1
soc=mx6
stderr=serial
stdin=serial
stdout=serial
uboot_file=u-boot.imx
vendor=digi
verifyaddr=88400000
wlanaddr=00:40:9D:98:AB:B4
zimage=zImage-ccimx6ulstarter.bin

Environment size: 2144/131067 bytes
=> help
? - alias for 'help'
askenv - get environment variables from stdin
base - print or set address offset
bdinfo - print Board Info structure
bmode - sd1|sd2|qspi1|nand|normal|usb|sata|ecspi1:0|ecspi1:1|ecspi1:2|ecspi1:3|esdhc1|esdhc2|esdhc3|esdhc4 [noreset]
board_id- Carrier board ID on fuse sub-system
board_version- Carrier board version on fuse sub-system
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
bootz - boot Linux zImage image from memory
chpart - change active partition
clocks - display clocks
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
dboot - Digi modules boot command
dcache - enable or disable data cache
dek_blob- Data Encryption Key blob encapsulation
dhcp - boot image via network using DHCP/TFTP protocol
dm - Driver model low level access
echo - echo args to console
editenv - edit environment variable
env - environment handling commands
erase - erase FLASH memory
exit - exit script
ext2load- load binary file from a Ext2 filesystem
ext2ls - list files in a directory (default /)
ext4load- load binary file from a Ext4 filesystem
ext4ls - list files in a directory (default /)
ext4size- determine a file's size
ext4write- create a file in the root directory
false - do nothing, unsuccessfully
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
fatsize - determine a file's size
fatwrite- write file into a dos filesystem
fdt - flattened device tree utility commands
flinfo - print FLASH memory information
fstype - Look up a filesystem type
fuse - Fuse sub-system
go - start application at address 'addr'
gpt - GUID Partition Table
hab_auth_img- authenticate image via HAB
hab_status- display HAB status
help - print command description/usage
hwid - HWID on fuse sub-system
i2c - I2C sub-system
icache - enable or disable instruction cache
iminfo - print header information for application image
imxtract- extract a part of a multi-image
itest - return true/false on integer compare
load - load binary file from a filesystem
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loadx - load binary file over serial line (xmodem mode)
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
ls - list files in a directory (default /)
md - memory display
mdio - MDIO utility commands
mii - MII utility commands
mm - memory modify (auto-incrementing address)
mmc - MMC sub system
mmcinfo - display MMC info
mtdparts- define flash/nand partitions
mtest - simple RAM read/write test
mw - memory write (fill)
nand - NAND sub-system
nboot - boot from NAND device
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
part - disk partition related commands
ping - send ICMP ECHO_REQUEST to network host
pmic - PMIC
printenv- print environment variables
protect - enable or disable FLASH write protection
reset - Perform RESET of the CPU
run - run commands in an environment variable
save - save file to a filesystem
saveenv - save environment variables to persistent storage
setenv - set environment variables
setexpr - set environment variable as the result of eval expression
showvar - print local hushshell variables
size - determine a file's size
sleep - delay execution for some time
source - run script from memory
test - minimal test like /bin/sh
tftpboot- boot image via network using TFTP protocol
time - run commands and summarize execution time
true - do nothing, successfully
trustfence- Digi Trustfence(TM) command
ubi - ubi commands
ubifsload- load file from an UBIFS filesystem
ubifsls - list files in a directory
ubifsmount- mount UBIFS volume
ubifsumount- unmount UBIFS volume
update - Digi modules update command
usb - USB sub-system
usbboot - boot from USB device
version - print monitor, compiler and linker version
=>

iosysでL-02Cが1.5kだったのでなんとなく確保。
netbsdで動かそうと思ってググったけどそのものズバリな(コピペして使える)設定が見つからなかったのでgooglability向上のため置いておく。

% sudo mkdir -p /etc/ppp/peers
% sudo touch /etc/ppp/options
% sudo tee /etc/ppp/peers/iijmio
/dev/dtyU2 921600
#debug
local
connect '/usr/sbin/chat -v -f /etc/ppp/iijmio.chat'
defaultroute
nopersist
asyncmap 0
noauth
^D
% sudo tee /etc/ppp/iijmio.chat
ABORT BUSY
ABORT ERROR
ABORT 'NO CARRIER'
'' AT
OK AT
OK ATZ
OK ATH
OK AT
OK AT+CGDCONT=1,"IP","iijmio.jp"
OK AT
OK ATD*99***1#
CONNECT \c
^D

で pppd call iijmio でppp0インターフェース経由で繋がる。簡単。
切断しても自動的に繋げなおしたい場合は /etc/ppp/peers/iijmio の nopersist を persist に変更すべし。
IPv6？ よくわかりません！ :D