[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

Additional note for this bug: this has been "fixed" upstream by adding a --dad-wait-time parameter to dhclient. However, that param defaults to 0, and also requires an update to the dhclient-script.linux that isc- dhcp provides. Debian has its own modified dhclient-script.linux, slightly

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

This does *not* appear to resolve a closely related problem where the link-local address has not yet been assigned. See LP: 1718568 In brief, the loop case " $out " in *\ dadfailed\ *) error "$dev: ipv6 dad failed." return 1;; *\

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

This bug was fixed in the package isc-dhcp - 4.3.3-5ubuntu15.2 --- isc-dhcp (4.3.3-5ubuntu15.2) yakkety; urgency=medium * debian/initramfs/lib/etc/dhcp/dhclient-enter-hooks.d/config: fix script to not write to /run/net-$iface.conf when dealing with IPv6; which should only

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

This bug was fixed in the package isc-dhcp - 4.1.ESV-R4-0ubuntu5.12 --- isc-dhcp (4.1.ESV-R4-0ubuntu5.12) precise; urgency=medium * ipv6: wait for duplicate address detection to finish (LP: #1633479). -- Scott Moser Mon, 31 Oct 2016 14:30:03 -0400 ** Changed

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

Scott, while this is a linux-specific change (and not applicable to upstream isc-dhcp itself), it doesn't look like this fix is upstream in debian; have you opened a bug there and/or are you planning to push it up? -- You received this bug notification because you are a member of Ubuntu Bugs,

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

Robie, wrt git noise on precise, I'm not fussed either way. I can re-upload if you'd like. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

I've removed the verification-needed tag that seemed to have been blocking this into precise-updates. My comment in 13 stands, as I verified on precise at that time, and added the verification-done-precise tag. ** Tags removed: verification-needed ** Tags added: verification-done -- You

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

This bug was fixed in the package isc-dhcp - 4.2.4-7ubuntu12.8 --- isc-dhcp (4.2.4-7ubuntu12.8) trusty; urgency=medium * ipv6: wait for duplicate address detection to finish (LP: #1633479). -- Scott Moser Mon, 31 Oct 2016 14:31:58 -0400 ** Changed in:

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

It looks like the updates to Trusty and Precise can now be released. Scott, there's .git noise in the Precise diff: http://launchpadlibrarian.net/291515979/isc- dhcp_4.1.ESV-R4-0ubuntu5.11_4.1.ESV-R4-0ubuntu5.12.diff.gz - do you want me to release anyway? Yakkety has been superseded by bug

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

I can also confirm trusty and precise as shown above. They behave differently, in that instead of exiting failure, dhclient actually tries again and ends up getting an address. So in precise you would see: | # dhclient -6 -1 -v $dev | Internet Systems Consortium DHCP Client 4.1-ESV-R4 |

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

I've verified that this fixes issue on yakkety. ## Set up a network in lxc that listens to dhcp ipv4 and ipv6 $ netname="v4and6" $ profname="$netname-profile" $ cnamepre="v4v6-" $ lxc network create $netname Network v4and6 created $ lxc network set $netname ipv6.dhcp.stateful true $ lxc profile

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Tags removed: 4010 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad (duplicate address detection) To manage notifications about this bug go to:

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

This bug was fixed in the package isc-dhcp - 4.3.3-5ubuntu12.4 --- isc-dhcp (4.3.3-5ubuntu12.4) xenial; urgency=medium * ipv6: wait for duplicate address detection to finish (LP: #1633479). -- Scott Moser Mon, 31 Oct 2016 14:32:14 -0400 ** Changed in:

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Tags added: verification-needed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad (duplicate address detection) To manage notifications about this

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Tags removed: verification-done ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad (duplicate address

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

isc-dhcp-client 4.3.3-5ubuntu12.4 fixed the problem for me. ** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title:

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

Hello Scott, or anyone else affected, Accepted isc-dhcp into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/isc- dhcp/4.3.3-5ubuntu12.4 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

Hello Scott, or anyone else affected, Accepted isc-dhcp into trusty-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/isc- dhcp/4.2.4-7ubuntu12.8 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Changed in: isc-dhcp (Ubuntu Precise) Status: New => Confirmed ** Changed in: isc-dhcp (Ubuntu Trusty) Status: New => Confirmed ** Changed in: isc-dhcp (Ubuntu Xenial) Status: New => Confirmed ** Changed in: isc-dhcp (Ubuntu Yakkety) Status: New => Confirmed **

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Tags added: 4010 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad (duplicate address detection) To manage notifications about this bug go to:

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Also affects: isc-dhcp (Ubuntu Yakkety) Importance: Undecided Status: New ** Also affects: isc-dhcp (Ubuntu Precise) Importance: Undecided Status: New ** Also affects: isc-dhcp (Ubuntu Xenial) Importance: Undecided Status: New ** Also affects: isc-dhcp (Ubuntu

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

This bug was fixed in the package isc-dhcp - 4.3.3-5ubuntu16 --- isc-dhcp (4.3.3-5ubuntu16) zesty; urgency=medium * ipv6: wait for duplicate address detection to finish (LP: #1633479). -- Scott Moser Thu, 20 Oct 2016 12:55:33 -0400 ** Changed in: isc-dhcp

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad (duplicate address detection) To manage notifications about this bug go to:

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

So I'm not convinced that doing this in dhclient is necessarily right. Unlike IPv4 where DHCP operates over a raw socket, in IPv6 mode, dhclient is just a regular network client and as such requires a source address to be set so it can contact the network (the link-local address in this case). As

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Patch added: "suggested fix" https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633479/+attachment/4761164/+files/suggested-fix.diff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Description changed: dhclient -6 does not wait for an interface go through duplicate address detection. As a result the following will almost always fail:  $ dev=eth0  $ ip link set down dev $dev  $ dhclient -6 -1 -v eth0  Internet Systems Consortium DHCP Client 4.3.3  

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

Note, bug 1447715 fixes ifupdown for this, but it seems to me that the fix is better suited here. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Description changed: dhclient -6 does not wait for an interface go through duplicate address detection. As a result the following will almost always fail: - $ dev=eth0 - $ ip link set down dev $dev - $ dhclient -6 -1 -v eth0 - Internet Systems Consortium DHCP Client 4.3.3 -

[Bug 1633479] Re: dhclient does not wait for ipv6 dad (duplicate address detection)

** Changed in: isc-dhcp (Ubuntu) Status: Fix Committed => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1633479 Title: dhclient does not wait for ipv6 dad (duplicate address