[SOLVED,IPv6]Wired networking stopped working on Gumstix

I recently updated my gumstix systems and I lost networking. I am a bit at a loss of why.

$this->bbcode_second_pass_quote('', 'n')etcfg.service - Netcfg multi-profile daemon
Loaded: loaded (/usr/lib/systemd/system/netcfg.service; enabled)
Active: failed (Result: exit-code) since Fri 1999-12-31 18:25:22 CST; 22min ago
Process: 254 ExecStart=/usr/bin/netcfg-daemon start (code=exited, status=1/FAILURE)

Dec 31 18:25:12 gumstix01 dhcpcd[276]: version 5.6.4 starting
Dec 31 18:25:12 gumstix01 dhcpcd[276]: eth0: broadcasting for a lease
Dec 31 18:25:22 gumstix01 dhcpcd[276]: timed out
Dec 31 18:25:22 gumstix01 netcfg-daemon[254]: :: ethernet-eth0 up DHCP IP le....
Dec 31 18:25:22 gumstix01 netcfg-daemon[254]: [fail]
Dec 31 18:25:22 gumstix01 systemd[1]: netcfg.service: main process exited, ...RE
Dec 31 18:25:22 gumstix01 systemd[1]: Failed to start Netcfg multi-profile ...n.
Dec 31 18:25:22 gumstix01 systemd[1]: Unit netcfg.service entered failed state

[WarheadsSE]

We've seen this before on other boards, wth.

[tesla]

Is there something different with the DHCPcd? I am also wondering if it is an IPV6 problem?

Thank goodness for direct serial port debugging.

[tesla]

WOOT got it. The university I work at is not fully ipv6 compliant.

Had to disable ipv6 in the kernel boot commands.
had to make a new boot.scr using the following bootcmd script with mkimage.

$this->bbcode_second_pass_code('', '
setenv bootargs 'console=ttyO2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext3 ipv6.disable=1'
mmc init
fatload mmc 0:1 0x80300000 uImage
bootm 0x80300000
boot
')

I followed the rest of the suggestions to make sure nothing else tries to use ipv6.
Just go down to Disable IPv6.
https://wiki.archlinux.org/index.php/IPv6