Hi, This is a weird one. Im, running Lenny with xen 3.4.2 on 2.6.31.6 pv_ops kernel. If I reboot my hvm guests so many times (7 i think) i then lose network connectivity to the main host (dom0) All other DomUs are unaffected. So far the only way i can get it back is to reboot the dom0 but this isn''t obviously not a fix. Has anyone else had this issue? Thanks Ian _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Are you using bridged networking by chance? I had seen something like this on lenny where sometimes when I restarted or shutdown a domain the host networking would drop out for about 15-30 seconds and I always assumed it must be something related to the bridging. - chris On Fri, Mar 26, 2010 at 6:52 AM, Ian Tobin <itobin@tidyhosts.com> wrote:> Hi, > > > > This is a weird one. > > > > Im, running Lenny with xen 3.4.2 on 2.6.31.6 pv_ops kernel. > > > > If I reboot my hvm guests so many times (7 i think) i then lose network > connectivity to the main host (dom0) > > > > All other DomUs are unaffected. So far the only way i can get it back is to > reboot the dom0 but this isn’t obviously not a fix. Has anyone else had > this issue? > > > > Thanks > > > > Ian > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, Yes using bridged networking. Strangely if i ping another host on the same network (pinging router doesn''t work) from the dom0 console and leave it pinging the network stays up even after rebooting domUs. As soon as i stop the ping and reboot the DomU the network stays off but the domU has network. If I reboot the dom0 and reboot a domu say 5 times its fine, anymore and it starts to drop until i start the ping or reboot the dom0. Its very odd, did you find a permanent fix? Obviously i can leave the ping running but its certainly not a solution. Thanks Ian -----Original Message----- From: chris [mailto:tknchris@gmail.com] Sent: 26 March 2010 14:02 To: Ian Tobin Cc: xen-users@lists.xensource.com Subject: Re: [Xen-users] Very Strange network problem Are you using bridged networking by chance? I had seen something like this on lenny where sometimes when I restarted or shutdown a domain the host networking would drop out for about 15-30 seconds and I always assumed it must be something related to the bridging. - chris On Fri, Mar 26, 2010 at 6:52 AM, Ian Tobin <itobin@tidyhosts.com> wrote:> Hi, > > > > This is a weird one. > > > > Im, running Lenny with xen 3.4.2 on 2.6.31.6 pv_ops kernel. > > > > If I reboot my hvm guests so many times (7 i think) i then lose network > connectivity to the main host (dom0) > > > > All other DomUs are unaffected. So far the only way i can get it back is to > reboot the dom0 but this isn''t obviously not a fix. Has anyone else had > this issue? > > > > Thanks > > > > Ian > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
I am experienced pretty much the same thing. I though it was possibly my nic, but more likely the bridging itself. I have a spare machine that''s exhibiting the same symptoms so I will play with it a bit more today and tomorrow and see if I can dig up anything else useful. I''d be open to discussing off list if you want to work together troubleshooting further. - chris On Fri, Mar 26, 2010 at 11:31 AM, Ian Tobin <itobin@tidyhosts.com> wrote:> Hi, > > Yes using bridged networking. Strangely if i ping another host on the same network (pinging router doesn''t work) from the dom0 console and leave it pinging the network stays up even after rebooting domUs. > > As soon as i stop the ping and reboot the DomU the network stays off but the domU has network. If I reboot the dom0 and reboot a domu say 5 times its fine, anymore and it starts to drop until i start the ping or reboot the dom0. > > Its very odd, did you find a permanent fix? Obviously i can leave the ping running but its certainly not a solution. > > Thanks > > Ian > > > > -----Original Message----- > From: chris [mailto:tknchris@gmail.com] > Sent: 26 March 2010 14:02 > To: Ian Tobin > Cc: xen-users@lists.xensource.com > Subject: Re: [Xen-users] Very Strange network problem > > Are you using bridged networking by chance? I had seen something like > this on lenny where sometimes when I restarted or shutdown a domain > the host networking would drop out for about 15-30 seconds and I > always assumed it must be something related to the bridging. > > - chris > > On Fri, Mar 26, 2010 at 6:52 AM, Ian Tobin <itobin@tidyhosts.com> wrote: >> Hi, >> >> >> >> This is a weird one. >> >> >> >> Im, running Lenny with xen 3.4.2 on 2.6.31.6 pv_ops kernel. >> >> >> >> If I reboot my hvm guests so many times (7 i think) i then lose network >> connectivity to the main host (dom0) >> >> >> >> All other DomUs are unaffected. So far the only way i can get it back is to >> reboot the dom0 but this isn''t obviously not a fix. Has anyone else had >> this issue? >> >> >> >> Thanks >> >> >> >> Ian >> >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi Chris, Its very strange. If you manage to fine anything let me know, im sure other people are having the same issue. I can do some off list troubleshooting, my only issue is that the box is live in a data center so getting console access and rebooting is limited but i will test what i can. Thanks Ian -----Original Message----- From: chris [mailto:tknchris@gmail.com] Sent: 26 March 2010 16:46 To: Ian Tobin Cc: xen-users@lists.xensource.com Subject: Re: [Xen-users] Very Strange network problem I am experienced pretty much the same thing. I though it was possibly my nic, but more likely the bridging itself. I have a spare machine that''s exhibiting the same symptoms so I will play with it a bit more today and tomorrow and see if I can dig up anything else useful. I''d be open to discussing off list if you want to work together troubleshooting further. - chris On Fri, Mar 26, 2010 at 11:31 AM, Ian Tobin <itobin@tidyhosts.com> wrote:> Hi, > > Yes using bridged networking. Strangely if i ping another host on the same network (pinging router doesn''t work) from the dom0 console and leave it pinging the network stays up even after rebooting domUs. > > As soon as i stop the ping and reboot the DomU the network stays off but the domU has network. If I reboot the dom0 and reboot a domu say 5 times its fine, anymore and it starts to drop until i start the ping or reboot the dom0. > > Its very odd, did you find a permanent fix? Obviously i can leave the ping running but its certainly not a solution. > > Thanks > > Ian > > > > -----Original Message----- > From: chris [mailto:tknchris@gmail.com] > Sent: 26 March 2010 14:02 > To: Ian Tobin > Cc: xen-users@lists.xensource.com > Subject: Re: [Xen-users] Very Strange network problem > > Are you using bridged networking by chance? I had seen something like > this on lenny where sometimes when I restarted or shutdown a domain > the host networking would drop out for about 15-30 seconds and I > always assumed it must be something related to the bridging. > > - chris > > On Fri, Mar 26, 2010 at 6:52 AM, Ian Tobin <itobin@tidyhosts.com> wrote: >> Hi, >> >> >> >> This is a weird one. >> >> >> >> Im, running Lenny with xen 3.4.2 on 2.6.31.6 pv_ops kernel. >> >> >> >> If I reboot my hvm guests so many times (7 i think) i then lose network >> connectivity to the main host (dom0) >> >> >> >> All other DomUs are unaffected. So far the only way i can get it back is to >> reboot the dom0 but this isn''t obviously not a fix. Has anyone else had >> this issue? >> >> >> >> Thanks >> >> >> >> Ian >> >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi, Did you get round to trying this? I still have this issue. My work around at the moment is to run a constant ping using screen to a non alive IP on the same subnet, don''t ask me why but it keeps the network stable. Thanks Ian -----Original Message----- From: chris [mailto:tknchris@gmail.com] Sent: 26 March 2010 16:46 To: Ian Tobin Cc: xen-users@lists.xensource.com Subject: Re: [Xen-users] Very Strange network problem I am experienced pretty much the same thing. I though it was possibly my nic, but more likely the bridging itself. I have a spare machine that''s exhibiting the same symptoms so I will play with it a bit more today and tomorrow and see if I can dig up anything else useful. I''d be open to discussing off list if you want to work together troubleshooting further. - chris On Fri, Mar 26, 2010 at 11:31 AM, Ian Tobin <itobin@tidyhosts.com> wrote:> Hi, > > Yes using bridged networking. Strangely if i ping another host on the same network (pinging router doesn''t work) from the dom0 console and leave it pinging the network stays up even after rebooting domUs. > > As soon as i stop the ping and reboot the DomU the network stays off but the domU has network. If I reboot the dom0 and reboot a domu say 5 times its fine, anymore and it starts to drop until i start the ping or reboot the dom0. > > Its very odd, did you find a permanent fix? Obviously i can leave the ping running but its certainly not a solution. > > Thanks > > Ian > > > > -----Original Message----- > From: chris [mailto:tknchris@gmail.com] > Sent: 26 March 2010 14:02 > To: Ian Tobin > Cc: xen-users@lists.xensource.com > Subject: Re: [Xen-users] Very Strange network problem > > Are you using bridged networking by chance? I had seen something like > this on lenny where sometimes when I restarted or shutdown a domain > the host networking would drop out for about 15-30 seconds and I > always assumed it must be something related to the bridging. > > - chris > > On Fri, Mar 26, 2010 at 6:52 AM, Ian Tobin <itobin@tidyhosts.com> wrote: >> Hi, >> >> >> >> This is a weird one. >> >> >> >> Im, running Lenny with xen 3.4.2 on 2.6.31.6 pv_ops kernel. >> >> >> >> If I reboot my hvm guests so many times (7 i think) i then lose network >> connectivity to the main host (dom0) >> >> >> >> All other DomUs are unaffected. So far the only way i can get it back is to >> reboot the dom0 but this isn''t obviously not a fix. Has anyone else had >> this issue? >> >> >> >> Thanks >> >> >> >> Ian >> >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users