* Does NetworkManager kill IPv6 connections? @ 2014-09-04 14:47 David Laight 2014-09-04 17:43 ` Daniel Borkmann 2014-09-04 18:17 ` Dan Williams 0 siblings, 2 replies; 5+ messages in thread From: David Laight @ 2014-09-04 14:47 UTC (permalink / raw) To: netdev@vger.kernel.org I was running a overnight test that failed because an (almost idle) IPv6 connection unexpectedly disconnected. 30 seconds before the disconnect syslog contains (retyped): NetworkManager[pid]: <info> policy set 'Wired connection 2' (eth0) as default for IPv6 routing and DNS. The same message appeared exactly 70 minutes earlier - with no ill effect. A second connection between the same pair if addresses (carrying a lot of traffic) was unaffected. Any idea what/why NetworkManager is doing? (Yes I know it is userspace, but it seems to be breaking the kernel....) The system is an ubuntu 13.04 desktop (3.8.0-19 kernel), that recent, but newer than the ones a lot of our customers use. I can rerun the test, but don't know what to look for. 'eth0' is the only ethernet interface in the system that is actually connected to a network. Some indications of where to look would be appreciated. David ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Does NetworkManager kill IPv6 connections? 2014-09-04 14:47 Does NetworkManager kill IPv6 connections? David Laight @ 2014-09-04 17:43 ` Daniel Borkmann 2014-09-04 18:17 ` Dan Williams 1 sibling, 0 replies; 5+ messages in thread From: Daniel Borkmann @ 2014-09-04 17:43 UTC (permalink / raw) To: David Laight; +Cc: netdev@vger.kernel.org, dcbw [ Cc'ing Dan ] On 09/04/2014 04:47 PM, David Laight wrote: > I was running a overnight test that failed because an (almost idle) IPv6 connection > unexpectedly disconnected. > 30 seconds before the disconnect syslog contains (retyped): > NetworkManager[pid]: <info> policy set 'Wired connection 2' (eth0) as default for IPv6 routing and DNS. > The same message appeared exactly 70 minutes earlier - with no ill effect. > A second connection between the same pair if addresses (carrying a lot of traffic) > was unaffected. > > Any idea what/why NetworkManager is doing? > (Yes I know it is userspace, but it seems to be breaking the kernel....) > > The system is an ubuntu 13.04 desktop (3.8.0-19 kernel), that recent, but > newer than the ones a lot of our customers use. > > I can rerun the test, but don't know what to look for. > 'eth0' is the only ethernet interface in the system that is actually > connected to a network. > > Some indications of where to look would be appreciated. > > David ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Does NetworkManager kill IPv6 connections? 2014-09-04 14:47 Does NetworkManager kill IPv6 connections? David Laight 2014-09-04 17:43 ` Daniel Borkmann @ 2014-09-04 18:17 ` Dan Williams 2014-09-05 14:18 ` David Laight 1 sibling, 1 reply; 5+ messages in thread From: Dan Williams @ 2014-09-04 18:17 UTC (permalink / raw) To: David Laight; +Cc: netdev@vger.kernel.org On Thu, 2014-09-04 at 14:47 +0000, David Laight wrote: > I was running a overnight test that failed because an (almost idle) IPv6 connection > unexpectedly disconnected. > 30 seconds before the disconnect syslog contains (retyped): > NetworkManager[pid]: <info> policy set 'Wired connection 2' (eth0) as default for IPv6 routing and DNS. > The same message appeared exactly 70 minutes earlier - with no ill effect. > A second connection between the same pair if addresses (carrying a lot of traffic) > was unaffected. > > Any idea what/why NetworkManager is doing? > (Yes I know it is userspace, but it seems to be breaking the kernel....) > > The system is an ubuntu 13.04 desktop (3.8.0-19 kernel), that recent, but > newer than the ones a lot of our customers use. Is the version of the Ubuntu "network-manager" package on your systems 0.9.8.0-0ubuntu6.1? If so, I know we've fixed a ton of issues with IPv6 since 0.9.8.0 (which was released about 18 months ago), and the ones that may be affecting you are related to router advertisement timing and expiry. The latest stable NM version upstream is 0.9.10 and should contain all of those fixes. Since I'm pretty sure this isn't a kernel problem, would you mind discussing this over on the NM lists here: https://mail.gnome.org/mailman/listinfo/networkmanager-list If you don't want to subscribe that's fine, I'll moderate your message through and we can just use "reply all". Thanks, Dan > I can rerun the test, but don't know what to look for. > 'eth0' is the only ethernet interface in the system that is actually > connected to a network. > > Some indications of where to look would be appreciated. > > David > > > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: Does NetworkManager kill IPv6 connections? 2014-09-04 18:17 ` Dan Williams @ 2014-09-05 14:18 ` David Laight 2014-09-05 18:42 ` Dan Williams 0 siblings, 1 reply; 5+ messages in thread From: David Laight @ 2014-09-05 14:18 UTC (permalink / raw) To: 'Dan Williams'; +Cc: netdev@vger.kernel.org From: Dan Williams > On Thu, 2014-09-04 at 14:47 +0000, David Laight wrote: > > I was running a overnight test that failed because an (almost idle) IPv6 connection > > unexpectedly disconnected. > > 30 seconds before the disconnect syslog contains (retyped): > > NetworkManager[pid]: <info> policy set 'Wired connection 2' (eth0) as default for IPv6 routing and DNS. > > The same message appeared exactly 70 minutes earlier - with no ill effect. > > A second connection between the same pair if addresses (carrying a lot of traffic) > > was unaffected. > > > > Any idea what/why NetworkManager is doing? > > (Yes I know it is userspace, but it seems to be breaking the kernel....) > > > > The system is an ubuntu 13.04 desktop (3.8.0-19 kernel), that recent, but > > newer than the ones a lot of our customers use. > > Is the version of the Ubuntu "network-manager" package on your systems > 0.9.8.0-0ubuntu6.1? It is actually the slightly older 0.9.8.0-0ubuntu6.0 > If so, I know we've fixed a ton of issues with IPv6 since 0.9.8.0 (which > was released about 18 months ago), and the ones that may be affecting > you are related to router advertisement timing and expiry. The latest > stable NM version upstream is 0.9.10 and should contain all of those > fixes. I've flagged it with our management, they'll decide what to say about IPv6 support in various Linux distros. David > Since I'm pretty sure this isn't a kernel problem, would you mind > discussing this over on the NM lists here: > > https://mail.gnome.org/mailman/listinfo/networkmanager-list > > If you don't want to subscribe that's fine, I'll moderate your message > through and we can just use "reply all". > > Thanks, > Dan > > > I can rerun the test, but don't know what to look for. > > 'eth0' is the only ethernet interface in the system that is actually > > connected to a network. > > > > Some indications of where to look would be appreciated. > > > > David > > > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe netdev" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Does NetworkManager kill IPv6 connections? 2014-09-05 14:18 ` David Laight @ 2014-09-05 18:42 ` Dan Williams 0 siblings, 0 replies; 5+ messages in thread From: Dan Williams @ 2014-09-05 18:42 UTC (permalink / raw) To: David Laight; +Cc: netdev@vger.kernel.org On Fri, 2014-09-05 at 14:18 +0000, David Laight wrote: > From: Dan Williams > > On Thu, 2014-09-04 at 14:47 +0000, David Laight wrote: > > > I was running a overnight test that failed because an (almost idle) IPv6 connection > > > unexpectedly disconnected. > > > 30 seconds before the disconnect syslog contains (retyped): > > > NetworkManager[pid]: <info> policy set 'Wired connection 2' (eth0) as default for IPv6 routing and DNS. > > > The same message appeared exactly 70 minutes earlier - with no ill effect. > > > A second connection between the same pair if addresses (carrying a lot of traffic) > > > was unaffected. > > > > > > Any idea what/why NetworkManager is doing? > > > (Yes I know it is userspace, but it seems to be breaking the kernel....) > > > > > > The system is an ubuntu 13.04 desktop (3.8.0-19 kernel), that recent, but > > > newer than the ones a lot of our customers use. > > > > Is the version of the Ubuntu "network-manager" package on your systems > > 0.9.8.0-0ubuntu6.1? > > It is actually the slightly older 0.9.8.0-0ubuntu6.0 > > > If so, I know we've fixed a ton of issues with IPv6 since 0.9.8.0 (which > > was released about 18 months ago), and the ones that may be affecting > > you are related to router advertisement timing and expiry. The latest > > stable NM version upstream is 0.9.10 and should contain all of those > > fixes. > > I've flagged it with our management, they'll decide what to say > about IPv6 support in various Linux distros. Ok, keep me (and the NM upstream) in the loop depending on what gets decided. Like I said, subsequent stable versions of NetworkManager in recent distros have much improved IPv6 support, and if you have a chance to try it out and let me know how it goes, that would be awesome. Dan > David > > > Since I'm pretty sure this isn't a kernel problem, would you mind > > discussing this over on the NM lists here: > > > > https://mail.gnome.org/mailman/listinfo/networkmanager-list > > > > If you don't want to subscribe that's fine, I'll moderate your message > > through and we can just use "reply all". > > > > Thanks, > > Dan > > > > > I can rerun the test, but don't know what to look for. > > > 'eth0' is the only ethernet interface in the system that is actually > > > connected to a network. > > > > > > Some indications of where to look would be appreciated. > > > > > > David > > > > > > > > > > > > -- > > > To unsubscribe from this list: send the line "unsubscribe netdev" in > > > the body of a message to majordomo@vger.kernel.org > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-09-05 18:42 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2014-09-04 14:47 Does NetworkManager kill IPv6 connections? David Laight 2014-09-04 17:43 ` Daniel Borkmann 2014-09-04 18:17 ` Dan Williams 2014-09-05 14:18 ` David Laight 2014-09-05 18:42 ` Dan Williams
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