Hi List ; I have a server running xen 3.4.2 on Centos 5.7 64 bit , today I tried to upgrade my xen to 4.1.2 using yum and gitco repository : http://www.gitco.de/repo/ yum completed the upgrade successfully , but after I restarted the server I noticed dom0 has no network connectivity. it could ping its own ip address , but could not ping the gateway. there was 3 interfaces up , eth0 , peth0 and lo. peth0 and eth0 had same mac address , eth0 had the ip address and peth0 had no IP address. I guess there was something wrong with the bridge , but I couldnt find the problem as my access was remote by KVM and you know how much kvm is horrible. hopefully I could reboot into normal kernel and downgrade the xen to version 3 again and everything was fixed. is there anything changed in networking of xen 4 ? is there any additional steps required for a successful upgrade from xen 3 to 4 ? Regards -- View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-to-4-upgrade-network-problem-tp5497164p5497164.html Sent from the Xen - User mailing list archive at Nabble.com.
Are you using xl or xm to create our vm ? You need to create bridge first so vif can be attached to it. Newtwork configuration had changed in 4.1.2 an with xl briges must be created first. On Sun, Feb 19, 2012 at 9:48 AM, FiFtHeLeMeNt <farzad.fallah@gmail.com>wrote:> Hi List ; > I have a server running xen 3.4.2 on Centos 5.7 64 bit , today I tried to > upgrade my xen to 4.1.2 using yum and gitco repository : > http://www.gitco.de/repo/ > yum completed the upgrade successfully , but after I restarted the server I > noticed dom0 has no network connectivity. it could ping its own ip address > , > but could not ping the gateway. > there was 3 interfaces up , eth0 , peth0 and lo. peth0 and eth0 had same > mac > address , eth0 had the ip address and peth0 had no IP address. > I guess there was something wrong with the bridge , but I couldnt find the > problem as my access was remote by KVM and you know how much kvm is > horrible. > hopefully I could reboot into normal kernel and downgrade the xen to > version > 3 again and everything was fixed. > is there anything changed in networking of xen 4 ? is there any additional > steps required for a successful upgrade from xen 3 to 4 ? > Regards > > -- > View this message in context: > http://xen.1045712.n5.nabble.com/Xen-3-to-4-upgrade-network-problem-tp5497164p5497164.html > Sent from the Xen - User mailing list archive at Nabble.com. > > _______________________________________________ > 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
as I said I am doing an upgrade from xen 3 to 4 , so I assume the old bridge was created by xm. I didnt create any bridges by myself. when I did the upgrade brctl show command showed a bridge named eth0 already exist on server. xen creates a default bridge on server , doesnt it ? if it was a clean install may be things was much more smoother , I dont think a clean install of xen 4 makes the server to lose its whole network connectivity after booting into xen kernel. seems some leftovers of xen 3 makes xen 4 not to work properly. I need to know what is exactly wrong before I can do the upgrade again , as the upgrade makes the server lose its network connectivity and I really can not work by KVM , it is horrible. any comments ? -- View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-to-4-upgrade-network-problem-tp5497164p5497207.html Sent from the Xen - User mailing list archive at Nabble.com.
Well do you have xend running? xen 4.1.x had switched to xl. can you post brctl show ? If you have brige named eth0 do you have vif = [''bridge=eth0''] in config file ? If you are using xm what xend-config.sxp shows for (network-script (vif-script On Sun, Feb 19, 2012 at 10:19 AM, FiFtHeLeMeNt <farzad.fallah@gmail.com>wrote:> as I said I am doing an upgrade from xen 3 to 4 , so I assume the old > bridge > was created by xm. I didnt create any bridges by myself. > when I did the upgrade brctl show command showed a bridge named eth0 > already > exist on server. xen creates a default bridge on server , doesnt it ? > if it was a clean install may be things was much more smoother , I dont > think a clean install of xen 4 makes the server to lose its whole network > connectivity after booting into xen kernel. > seems some leftovers of xen 3 makes xen 4 not to work properly. > I need to know what is exactly wrong before I can do the upgrade again , as > the upgrade makes the server lose its network connectivity and I really can > not work by KVM , it is horrible. > any comments ? > > -- > View this message in context: > http://xen.1045712.n5.nabble.com/Xen-3-to-4-upgrade-network-problem-tp5497164p5497207.html > Sent from the Xen - User mailing list archive at Nabble.com. > > _______________________________________________ > 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
Yes , I verified xend was running. brctl show : bridge name bridge id STP enabled interfaces eth0 8000.003048f1808c no peth0 If you have brige named eth0> do you have vif = [''bridge=eth0''] in config file ?which config file do you mean ? from xend-config.sxp : (network-script network-bridge) (vif-script vif-bridge) -- View this message in context: http://xen.1045712.n5.nabble.com/Xen-3-to-4-upgrade-network-problem-tp5497164p5497768.html Sent from the Xen - User mailing list archive at Nabble.com.
Am Sonntag, 19. Februar 2012, 15:14:11 schrieb FiFtHeLeMeNt:> brctl show : > bridge name bridge id STP enabled interfaces > eth0 8000.003048f1808c no peth0Ok, because this is confusing as eth0 usually is used for real ethernet interfaces this behaviour of xen is outdated. best regards, Niels. -- --- Niels Dettenbach Syndicat IT&Internet http://www.syndicat.com/ _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users