Ubuntu
initramfs-tools package

please add a cmdline option to chose between ipv4, ipv6, or dual-stack network boot

Bug #1631010 reported by LaMont Jones on 2016-10-06

This bug report is a duplicate of: Bug #1621507: initramfs-tools configure_networking() fails to dhcp ipv6 addresses. Edit Remove

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	initramfs-tools (Ubuntu)	New	Wishlist	Unassigned

Bug Description

Right now, I can boot with "ip=::::hostname:BOOTIF" in the kernel commandline, and (after bug 1621507), I get whatever it came up with for ipv4 and ipv6. If for nothing more than testing on a dual-stack environment, it would be nice to be able to force that to try both (current behavior, and an excellent default), only try IPv4, or only IPv6.

NOT something that needs to be fixed before yakkety, but would be nice to eventually get back to xenial.

LaMont Jones (lamont) on 2016-10-06

Changed in initramfs-tools (Ubuntu):
importance:	Undecided → Wishlist

Revision history for this message

Scott Moser (smoser) wrote on 2016-10-12:

I put a branch at https://code.launchpad.net/~smoser/ubuntu/+source/initramfs-tools/+git/initramfs-tools/+ref/lp-1631010 with a fix for this.

other improvements too:
improvements to dhclient handing of ip= command lines.

    Improvemnts here are:
     a.) do not leave /run/net-* around if dhclient failed
     b.) support ip6= on the kernel cmdline
         ip6=
            off : default. ip= does not mean to do ipv6
            only : only do ipv6 (no ipv4)
            on : always do ipv6 even if ipv4 succeeded.
            iff : do ipv6 if and only if ipv4 fails
     c.) wait for link local address to settle (dad) before
         attempting to dhcp -6
     d.) do not run through the dhcp configure once for each ROUNDTTT