** Changed in: dhcp3 (Debian)
Status: Confirmed = Fix Released
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Title:
dhcp3-server reports many bad udp checksums to
** Changed in: dhcp3 (Debian)
Status: Confirmed = Fix Released
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio
** Changed in: dhcp3 (Debian)
Status: New = Confirmed
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Title:
dhcp3-server reports many bad udp checksums to syslog using
** Changed in: dhcp3 (Debian)
Status: New = Confirmed
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio NIC
To
** Also affects: dhcp3 (Debian) via
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717217
Importance: Unknown
Status: Unknown
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** Changed in: dhcp3 (Debian)
Status: Unknown = New
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Title:
dhcp3-server reports many bad udp checksums to syslog using
** Also affects: dhcp3 (Debian) via
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717217
Importance: Unknown
Status: Unknown
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** Changed in: dhcp3 (Debian)
Status: Unknown = New
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio NIC
To
This bug was fixed in the package lxc - 1.0.0~alpha3-0ubuntu8
---
lxc (1.0.0~alpha3-0ubuntu8) trusty; urgency=low
* Add iptables rule to fix checksum of udp packets for dhcp (LP: #930962)
-- Serge Hallyn serge.hal...@ubuntu.com Tue, 10 Dec 2013 11:27:09 -0600
** Changed in:
This bug was fixed in the package lxc - 1.0.0~alpha3-0ubuntu8
---
lxc (1.0.0~alpha3-0ubuntu8) trusty; urgency=low
* Add iptables rule to fix checksum of udp packets for dhcp (LP: #930962)
-- Serge Hallyn serge.hal...@ubuntu.com Tue, 10 Dec 2013 11:27:09 -0600
** Changed in:
See bug 1254338 - the 'fix' in the isc dhcp packages doesn't help at
all for folk with existing containers: adding a mangle rule to the
lxcbr0 in lxc-net.conf helps.
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I'd be ok with adding a /usr/share/lxc/hooks/network-bootpc-checksum
script which does the iptables add, and having the debian template add
that to lxc.hook.pre-start. However, in that hook script we'd want to
avoid having one rule added per container start. What's the cleanest
and most robust
** Changed in: lxc (Ubuntu)
Status: New = Confirmed
** Changed in: lxc (Ubuntu)
Importance: Undecided = High
** Changed in: lxc (Ubuntu)
Status: Confirmed = Incomplete
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16:13 rbasak hallyn_: about bug 930962. I was suggesting doing the mangle the
other way
inside the container. Not sure if that's possible.
16:13 rbasak hallyn_: if not, then iptables -D can delete a rule by its
specification,
so perhaps iptables -D ... || true;
16:13 rbasak hallyn_: if not, then iptables -D can delete a rule by its
specification,
so perhaps iptables -D ... || true; iptables -A ... is a
(hacky)
workaround?
I think I prefer to keep a file like /run/lxc/features/iptables-checksum
to show that it's
Changing to low priority as there is a workaround.
** Changed in: lxc (Ubuntu)
Importance: High = Low
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Title:
dhcp3-server
I'd be ok with adding a /usr/share/lxc/hooks/network-bootpc-checksum
script which does the iptables add, and having the debian template add
that to lxc.hook.pre-start. However, in that hook script we'd want to
avoid having one rule added per container start. What's the cleanest
and most robust
** Changed in: lxc (Ubuntu)
Status: New = Confirmed
** Changed in: lxc (Ubuntu)
Importance: Undecided = High
** Changed in: lxc (Ubuntu)
Status: Confirmed = Incomplete
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16:13 rbasak hallyn_: about bug 930962. I was suggesting doing the mangle the
other way
inside the container. Not sure if that's possible.
16:13 rbasak hallyn_: if not, then iptables -D can delete a rule by its
specification,
so perhaps iptables -D ... || true;
16:13 rbasak hallyn_: if not, then iptables -D can delete a rule by its
specification,
so perhaps iptables -D ... || true; iptables -A ... is a
(hacky)
workaround?
I think I prefer to keep a file like /run/lxc/features/iptables-checksum
to show that it's
Changing to low priority as there is a workaround.
** Changed in: lxc (Ubuntu)
Importance: High = Low
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Title:
dhcp3-server reports many bad
This issue also affects the debian LXC template in Ubuntu (lxc
1.0.0~alpha1-0ubuntu11). If I create a Debian jessie container on Ubuntu
Saucy, then the container cannot DHCP.
Workaround: sudo iptables -t mangle -A POSTROUTING -o lxcbr0 -p udp
--dport bootpc -j CHECKSUM --checksum-fill
It looks
This issue also affects the debian LXC template in Ubuntu (lxc
1.0.0~alpha1-0ubuntu11). If I create a Debian jessie container on Ubuntu
Saucy, then the container cannot DHCP.
Workaround: sudo iptables -t mangle -A POSTROUTING -o lxcbr0 -p udp
--dport bootpc -j CHECKSUM --checksum-fill
It looks
new package was in precise-proposed this morning, it fixed the problem.
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Title:
dhcp3-server reports many bad udp checksums to
new package was in precise-proposed this morning, it fixed the problem.
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Title:
dhcp3-server reports many bad udp checksums to syslog using
This bug was fixed in the package dhcp3 - 3.1.3-2ubuntu3.5
---
dhcp3 (3.1.3-2ubuntu3.5) lucid-proposed; urgency=low
* Include patch from RedHat/Fedora to deal with hardware/xen/virtio offload
of UDP checksums. (LP: #930962)
* Update apparmor profile to add required the
This bug was fixed in the package isc-dhcp - 4.1.ESV-R4-0ubuntu5.8
---
isc-dhcp (4.1.ESV-R4-0ubuntu5.8) precise-proposed; urgency=low
[ Dave Chiluk ]
* Allow dhcpd to read /etc/ldap/ldap.conf for isc-dhcp-server-ldap.
(LP: #1057358). Backported from Stéphane Graber's quantal
This bug was fixed in the package dhcp3 - 3.1.3-2ubuntu3.5
---
dhcp3 (3.1.3-2ubuntu3.5) lucid-proposed; urgency=low
* Include patch from RedHat/Fedora to deal with hardware/xen/virtio offload
of UDP checksums. (LP: #930962)
* Update apparmor profile to add required the
This bug was fixed in the package isc-dhcp - 4.1.ESV-R4-0ubuntu5.8
---
isc-dhcp (4.1.ESV-R4-0ubuntu5.8) precise-proposed; urgency=low
[ Dave Chiluk ]
* Allow dhcpd to read /etc/ldap/ldap.conf for isc-dhcp-server-ldap.
(LP: #1057358). Backported from Stéphane Graber's quantal
Works well for me too with a lucid LXC container on saucy. Thanks!
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Title:
dhcp3-server reports many bad udp checksums to syslog
Works well for me too with a lucid LXC container on saucy. Thanks!
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio
Recent kernel changes are now causing this issue to appear in LXC containers
too where the libvirt mangle rule doesn't help at all.
As a result I'm now preparing SRUs for both lucid and precise so that all
supported Ubuntu versions know to deal with missing checksums.
** Also affects: isc-dhcp
** Changed in: isc-dhcp (Ubuntu Precise)
Status: Triaged = In Progress
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Title:
dhcp3-server reports many bad udp checksums
** Changed in: dhcp3 (Ubuntu Lucid)
Status: Triaged = In Progress
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Title:
dhcp3-server reports many bad udp checksums to
Hello Tim, or anyone else affected,
Accepted isc-dhcp into precise-proposed. The package will build now and
be available at http://launchpad.net/ubuntu/+source/isc-
dhcp/4.1.ESV-R4-0ubuntu5.8 in a few hours, and then in the -proposed
repository.
Please help us by testing this new package. See
** Branch linked: lp:ubuntu/lucid-proposed/dhcp3
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio NIC
Tested in a precise LXC container running on saucy and confirmed that
this fixes the issue there.
** Tags added: verification-done-precise
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Tested in a lucid LXC container on saucy, also fixes the bug.
** Tags removed: verification-needed
** Tags added: verification-done verification-done-lucid
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Recent kernel changes are now causing this issue to appear in LXC containers
too where the libvirt mangle rule doesn't help at all.
As a result I'm now preparing SRUs for both lucid and precise so that all
supported Ubuntu versions know to deal with missing checksums.
** Also affects: isc-dhcp
** Changed in: isc-dhcp (Ubuntu Precise)
Status: Triaged = In Progress
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Title:
dhcp3-server reports many bad udp checksums to syslog using
** Changed in: dhcp3 (Ubuntu Lucid)
Status: Triaged = In Progress
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Title:
dhcp3-server reports many bad udp checksums to syslog using
Hello Tim, or anyone else affected,
Accepted isc-dhcp into precise-proposed. The package will build now and
be available at http://launchpad.net/ubuntu/+source/isc-
dhcp/4.1.ESV-R4-0ubuntu5.8 in a few hours, and then in the -proposed
repository.
Please help us by testing this new package. See
** Branch linked: lp:ubuntu/lucid-proposed/dhcp3
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio NIC
To manage
Tested in a precise LXC container running on saucy and confirmed that
this fixes the issue there.
** Tags added: verification-done-precise
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Title:
Tested in a lucid LXC container on saucy, also fixes the bug.
** Tags removed: verification-needed
** Tags added: verification-done verification-done-lucid
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Any plans to get this fix into 12.04 LTS? Or can I run the new packages
inside LTS?
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Title:
dhcp3-server reports many bad udp checksums to syslog
This bug was fixed in the package isc-dhcp - 4.2.4-1ubuntu10.2
---
isc-dhcp (4.2.4-1ubuntu10.2) quantal-proposed; urgency=low
* Fix isc-dhcp-server-ldap not actually containing ldap support.
Thanks to Christian Hoffmann for tracking down the issue. (LP: #1071928)
* Don't set
** Tags removed: verification-needed
** Tags added: verification-done
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Title:
dhcp3-server reports many bad udp checksums to syslog using virtio
Hi Dave, thanks for uploading that.
I have upgraded the DHCP server system to Quantal:
# dpkg -l | grep dhcp
ii isc-dhcp-client 4.2.4-1ubuntu10.1amd64
ISC DHCP client
ii isc-dhcp-common 4.2.4-1ubuntu10.1amd64
common
The http://launchpad.net/ubuntu/+source/isc-dhcp/4.2.4-1ubuntu10.2
package fixes this for me on quantal.
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Title:
dhcp3-server reports many bad
Hello Tim, or anyone else affected,
Accepted isc-dhcp into quantal-proposed. The package will build now and
be available at http://launchpad.net/ubuntu/+source/isc-
dhcp/4.2.4-1ubuntu10.2 in a few hours, and then in the -proposed
repository.
Please help us by testing this new package. See
** Also affects: isc-dhcp (Ubuntu Quantal)
Importance: Undecided
Status: New
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Title:
dhcp3-server reports many bad udp checksums to
** Changed in: isc-dhcp (Ubuntu Quantal)
Status: New = In Progress
** Changed in: isc-dhcp (Ubuntu Quantal)
Assignee: (unassigned) = Stéphane Graber (stgraber)
** Description changed:
- Tested with dhcp3-server ver. 3.1.3-2ubuntu3.3 in Ubuntu 10.04.3
- Server, x64.
+ == Rationale
The next isc-dhcp upload will contain the RedHat patch for hardware/xen/virtio
offloading.
Upstream was contacted through Debian but without any response yet.
** Changed in: isc-dhcp (Ubuntu)
Status: Confirmed = Fix Committed
** Changed in: isc-dhcp (Ubuntu)
Assignee: Stefan Bader
This bug was fixed in the package isc-dhcp - 4.2.4-4ubuntu1
---
isc-dhcp (4.2.4-4ubuntu1) raring; urgency=low
* Merge from Debian, remaining changes:
- Apparmor profiles for dhclient and dhcpd.
- Upstart jobs for isc-dhcp-server, isc-dhcp-server6, isc-dhcp-relay and
On 7 January 2013 23:13, Martijn Lievaart 930...@bugs.launchpad.net wrote:
According to my cursory reading of relevant RFCs and a quick wireshark
session, the bug is in KVM virtio. An UDP packet should contain a
checksum field of 0 for no checksum, or a correct checksum. I see bogus
values
On 7 January 2013 23:13, Martijn Lievaart 930...@bugs.launchpad.net wrote:
According to my cursory reading of relevant RFCs and a quick wireshark
session, the bug is in KVM virtio. An UDP packet should contain a
checksum field of 0 for no checksum, or a correct checksum. I see bogus
values
Hello,
On 8 January 2013 15:01, Martijn Lievaart 930...@bugs.launchpad.net
wrote:
Hi Michal,
I don't quite understand what you are saying here. Are you saying that
because Linux has a kernel interface to check for offloading, any and
all application (that cares about udp checksums) should
This workaround on bridged clients seems to make dhcpd happy
sudo iptables -A POSTROUTING -t mangle -p udp --dport 67 -j CHECKSUM
--checksum-fill
(Luckily I only need it on my Icinga to check dhcp, all clients have
fixed IPs)
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Note that the analog workaround on the server running dhcpd does not
work. I assume the raw socket used by dhcpd is read before PREROUTING is
hit. That makes this bug ugly, as the workaround must be done on *all*
clients instead of only the server.
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According to my cursory reading of relevant RFCs and a quick wireshark
session, the bug is in KVM virtio. An UDP packet should contain a
checksum field of 0 for no checksum, or a correct checksum. I see bogus
values coming in.
OTOH, wireshark warns that this may be due to offloading, so I may not
As mentioned in the first comment, switching to e1000 NIC on the dhcpd
server also fixed the issue.
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Title:
dhcp3-server reports many bad udp
This workaround succeeded for me (on my KVM hypervisor):
sudo iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM
--checksum-fill
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No, I am using some other manually installed workaround, and I am
using bare dnsmasq and dhcp client, not network manager nor libvirt.
Did not get to figuring out what the workaround was yet.
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Did not get to figuring out what the workaround was yet.
See the comment before your comment. :) Well, probably not that simple when
using the mail interface as ordering differs there. But in the report itself.
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On 8 August 2012 18:35, Stefan Bader stefan.ba...@canonical.com wrote:
Finally got some time to look into this. As much as my test reproduction
of this goes it would be not critical in importance because clients seem
to get an IP address even with those messages showing up.
That's not what I
On 09.08.2012 10:21, Michal Suchanek wrote:
of this goes it would be not critical in importance because clients seem
to get an IP address even with those messages showing up.
That's not what I see here, they do not get an IP address.
Then what is your exact setup?
- virtio (and xen
On 9 August 2012 10:49, Stefan Bader stefan.ba...@canonical.com wrote:
On 09.08.2012 10:21, Michal Suchanek wrote:
of this goes it would be not critical in importance because clients seem
to get an IP address even with those messages showing up.
That's not what I see here, they do not get an
I added Quantal and Precise version of the isc-dhcp packages to
http://people.canonical.com/~smb/lp930962/ for some broader testing. Are
those also fixing the issues where no IP addresses were assigned?
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On 09.08.2012 11:17, Michal Suchanek wrote:
Then what is your exact setup?
dnsmasq running on xen dom0 and xen dumUs trying to get IP address
with dhcp client.
Ah ok, I was using the isc-dhcp-server on a KVM guest to isc-dhcp-clinet on
another one.
But thought I also had been using the
Right, so all the hosts I use already have this in sudo iptables -L -t
mangle
Chain POSTROUTING (policy ACCEPT)
target prot opt source destination
CHECKSUM udp -- anywhere anywhere udp dpt:bootpc
CHECKSUM fill
I suspect this is added in
Finally got some time to look into this. As much as my test reproduction
of this goes it would be not critical in importance because clients seem
to get an IP address even with those messages showing up.
I can see those bad crc messages in (Quantal, Precise and Lucid those
just been the ones I
Subscribing Stefan Bader as he's known to have an interest in that sort
of things ;)
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Title:
dhcp3-server reports many bad udp checksums to
This bug IS critical.
We must add the fedora patch to official packages.
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Title:
dhcp3-server reports many bad udp checksums to syslog using
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: isc-dhcp (Ubuntu)
Status: New = Confirmed
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Title:
I just hit that bug and I might be wrong but I think the bug is critial since
it prevent any precise cloud image to have
an IP address at boot time on OpenStack for example since like you said
--libvirt_use_virtio_for_bridges is enabled
by default in precise.
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