Hi, After I live migrate a VM from one Xen host to another, the networking on the VM stops until I do something like arping it from a server on the same network, or login to the console of the VM and use the network in some way (eg. ping another server, start tcpdump, check a host name). I have configured the networking as per: http://sourceware.org/cluster/faq.html#xenclustererrors because of fencing issues. Everything works perfectly, except that until something happens with the networking on the VM, the networking is stopped. Any thoughts? I''m not sure what information to send--this is Redhat EL5.1. Thanks, MO.THER> _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Ross S. W. Walker
2008-Apr-01 18:21 UTC
RE: [Xen-users] Networking stops on vm after live migration
mo ther wrote:> > Hi, > > After I live migrate a VM from one Xen host to another, the > networking on the VM stops until I do something like arping > it from a server on the same network, or login to the console > of the VM and use the network in some way (eg. ping another > server, start tcpdump, check a host name). > > I have configured the networking as per: > http://sourceware.org/cluster/faq.html#xenclustererrors > because of fencing issues. Everything works perfectly, except > that until something happens with the networking on the VM, > the networking is stopped. > > Any thoughts? I''m not sure what information to send--this is > Redhat EL5.1.Did you try upgrading your network drivers to the latest and greatest versions? -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
They have the latest Redhat 5.1 packages available. On Tue, Apr 1, 2008 at 12:21 PM, Ross S. W. Walker <rwalker@medallion.com> wrote:> mo ther wrote: > > > > Hi, > > > > After I live migrate a VM from one Xen host to another, the > > networking on the VM stops until I do something like arping > > it from a server on the same network, or login to the console > > of the VM and use the network in some way (eg. ping another > > server, start tcpdump, check a host name). > > > > I have configured the networking as per: > > http://sourceware.org/cluster/faq.html#xenclustererrors > > because of fencing issues. Everything works perfectly, except > > that until something happens with the networking on the VM, > > the networking is stopped. > > > > Any thoughts? I''m not sure what information to send--this is > > Redhat EL5.1. > > Did you try upgrading your network drivers to the latest and > greatest versions? > > -Ross > > ______________________________________________________________________ > This e-mail, and any attachments thereto, is intended only for use by > the addressee(s) named herein and may contain legally privileged > and/or confidential information. If you are not the intended recipient > of this e-mail, you are hereby notified that any dissemination, > distribution or copying of this e-mail, and any attachments thereto, > is strictly prohibited. If you have received this e-mail in error, > please immediately notify the sender and permanently delete the > original and any copy or printout thereof. > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jayson Vantuyl
2008-Apr-01 23:39 UTC
Re: [Xen-users] Networking stops on vm after live migration
This could happen if the new instance got a new MAC address. Can you connect to the console and run "ip link" to see if the MAC address changes after the migration? Also, are you using bridged or routed networking? On Apr 1, 2008, at 12:37 PM, mo ther wrote:> They have the latest Redhat 5.1 packages available. > > On Tue, Apr 1, 2008 at 12:21 PM, Ross S. W. Walker <rwalker@medallion.com > > wrote: > mo ther wrote: > > > > Hi, > > > > After I live migrate a VM from one Xen host to another, the > > networking on the VM stops until I do something like arping > > it from a server on the same network, or login to the console > > of the VM and use the network in some way (eg. ping another > > server, start tcpdump, check a host name). > > > > I have configured the networking as per: > > http://sourceware.org/cluster/faq.html#xenclustererrors > > because of fencing issues. Everything works perfectly, except > > that until something happens with the networking on the VM, > > the networking is stopped. > > > > Any thoughts? I''m not sure what information to send--this is > > Redhat EL5.1. > > Did you try upgrading your network drivers to the latest and > greatest versions? > > -Ross > > ______________________________________________________________________ > This e-mail, and any attachments thereto, is intended only for use by > the addressee(s) named herein and may contain legally privileged > and/or confidential information. If you are not the intended recipient > of this e-mail, you are hereby notified that any dissemination, > distribution or copying of this e-mail, and any attachments thereto, > is strictly prohibited. If you have received this e-mail in error, > please immediately notify the sender and permanently delete the > original and any copy or printout thereof. > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users-- Jayson Vantuyl Systems Architect Engine Yard jvantuyl@engineyard.com 1 866 518 9275 ext 204 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Tue, Apr 1, 2008 at 5:39 PM, Jayson Vantuyl <jvantuyl@engineyard.com> wrote:> This could happen if the new instance got a new MAC address. Can you > connect to the console and run "ip link" to see if the MAC address changes > after the migration? >It definitely isn''t changing. Does anyone know what script sets up the networking once the vm has been completely transferred?> > Also, are you using bridged or routed networking? >Bridging, ala http://sourceware.org/cluster/faq.html#xenclustererrors> > On Apr 1, 2008, at 12:37 PM, mo ther wrote: > > They have the latest Redhat 5.1 packages available. > > On Tue, Apr 1, 2008 at 12:21 PM, Ross S. W. Walker <rwalker@medallion.com> > wrote: > > > mo ther wrote: > > > > > > Hi, > > > > > > After I live migrate a VM from one Xen host to another, the > > > networking on the VM stops until I do something like arping > > > it from a server on the same network, or login to the console > > > of the VM and use the network in some way (eg. ping another > > > server, start tcpdump, check a host name). > > > > > > I have configured the networking as per: > > > http://sourceware.org/cluster/faq.html#xenclustererrors > > > because of fencing issues. Everything works perfectly, except > > > that until something happens with the networking on the VM, > > > the networking is stopped. > > > > > > Any thoughts? I''m not sure what information to send--this is > > > Redhat EL5.1. > > > > Did you try upgrading your network drivers to the latest and > > greatest versions? > > > > -Ross > > > > ______________________________________________________________________ > > This e-mail, and any attachments thereto, is intended only for use by > > the addressee(s) named herein and may contain legally privileged > > and/or confidential information. If you are not the intended recipient > > of this e-mail, you are hereby notified that any dissemination, > > distribution or copying of this e-mail, and any attachments thereto, > > is strictly prohibited. If you have received this e-mail in error, > > please immediately notify the sender and permanently delete the > > original and any copy or printout thereof. > > > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > > > > -- > Jayson Vantuyl > Systems Architect > *Engine Yard <http://www.engineyard.com>* > jvantuyl@engineyard.com > 1 866 518 9275 ext 204 > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Jayson Vantuyl
2008-Apr-02 05:33 UTC
Re: [Xen-users] Networking stops on vm after live migration
Interesting. Before and after migration, run "ip link" on the hosts. See what vif device is being created for the move. When it is moved, check /proc/ sys/net/ipv4/conf/<vif device>/proxy_arp. If it is not 0, this could also be related. How smart is the switch that these machines are on? Do you have access to a hub? I know they''re a bit hard to get these days, but if things work with the hub, then it is probably a problem generating the gratuitous ARP for the migration. Generally this is set up in /etc/xen/scripts/vif-bridge. I am unsure how this works for migration, but I suspect it is done the normal way. On Apr 1, 2008, at 7:01 PM, mo ther wrote:> > > On Tue, Apr 1, 2008 at 5:39 PM, Jayson Vantuyl <jvantuyl@engineyard.com > > wrote: > This could happen if the new instance got a new MAC address. Can > you connect to the console and run "ip link" to see if the MAC > address changes after the migration? > > It definitely isn''t changing. > > Does anyone know what script sets up the networking once the vm has > been completely transferred? > > > Also, are you using bridged or routed networking? > > Bridging, ala http://sourceware.org/cluster/faq.html#xenclustererrors > > > On Apr 1, 2008, at 12:37 PM, mo ther wrote: >> They have the latest Redhat 5.1 packages available. >> >> On Tue, Apr 1, 2008 at 12:21 PM, Ross S. W. Walker <rwalker@medallion.com >> > wrote: >> mo ther wrote: >> > >> > Hi, >> > >> > After I live migrate a VM from one Xen host to another, the >> > networking on the VM stops until I do something like arping >> > it from a server on the same network, or login to the console >> > of the VM and use the network in some way (eg. ping another >> > server, start tcpdump, check a host name). >> > >> > I have configured the networking as per: >> > http://sourceware.org/cluster/faq.html#xenclustererrors >> > because of fencing issues. Everything works perfectly, except >> > that until something happens with the networking on the VM, >> > the networking is stopped. >> > >> > Any thoughts? I''m not sure what information to send--this is >> > Redhat EL5.1. >> >> Did you try upgrading your network drivers to the latest and >> greatest versions? >> >> -Ross >> >> ______________________________________________________________________ >> This e-mail, and any attachments thereto, is intended only for use by >> the addressee(s) named herein and may contain legally privileged >> and/or confidential information. If you are not the intended >> recipient >> of this e-mail, you are hereby notified that any dissemination, >> distribution or copying of this e-mail, and any attachments thereto, >> is strictly prohibited. If you have received this e-mail in error, >> please immediately notify the sender and permanently delete the >> original and any copy or printout thereof. >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users > > > > -- > Jayson Vantuyl > Systems Architect > Engine Yard > jvantuyl@engineyard.com > 1 866 518 9275 ext 204 > >-- Jayson Vantuyl Systems Architect Engine Yard jvantuyl@engineyard.com 1 866 518 9275 ext 204 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users