Re: Unstable VM network connectivity after upgrade 4.2.8 to 4.3.7
Hi Latcho, Most probably it's a bug. Have you tried virtio and/or rtl-based NIC ? As far as I know, CentOS 5 supports Virtio after Kernel >= 2.6.25 . Best Regards, Strahil NikolovOn Jan 11, 2020 19:54, Latchezar Filtchev <Latcho@aubg.bg> wrote:
Hello Everyone,
I am aware my guest OS is out of support but I experienced the following:
oVirt – 4.2.8 (self-hosted engine)
VM – CentOS 5.2; two VNIC’s ( driver used e1000) connected to different VLAN’s; - no issues with network connectivity
After upgrade to oVirt 4.3.7
The same VM starts normally. Network is available for several seconds (10 – 20 pings) and then it disappears. The machine works but no ping to/from VM. When I am returning the same machine (via export domain) to oVirt 4.2.8 environment – it works as expected.
Can someone advise on this? Any help will be greatly appreciated.
Thank you.
Best,
Latcho
Dear Strahi, I tried rtl8139. The behavior is the same. Best, Latcho From: Strahil <hunter86_bg@yahoo.com> Sent: Sunday, January 12, 2020 1:19 AM To: Latchezar Filtchev <Latcho@aubg.bg>; users <users@ovirt.org> Subject: Re: [ovirt-users] Unstable VM network connectivity after upgrade 4.2.8 to 4.3.7 Hi Latcho, Most probably it's a bug. Have you tried virtio and/or rtl-based NIC ? As far as I know, CentOS 5 supports Virtio after Kernel >= 2.6.25 . Best Regards, Strahil Nikolov On Jan 11, 2020 19:54, Latchezar Filtchev <Latcho@aubg.bg<mailto:Latcho@aubg.bg>> wrote: Hello Everyone, I am aware my guest OS is out of support but I experienced the following: oVirt – 4.2.8 (self-hosted engine) VM – CentOS 5.2; two VNIC’s ( driver used e1000) connected to different VLAN’s; - no issues with network connectivity After upgrade to oVirt 4.3.7 The same VM starts normally. Network is available for several seconds (10 – 20 pings) and then it disappears. The machine works but no ping to/from VM. When I am returning the same machine (via export domain) to oVirt 4.2.8 environment – it works as expected. Can someone advise on this? Any help will be greatly appreciated. Thank you. Best, Latcho
Hi Lacho, Can you run the virtio drivers ? They are the most tested in KVM . Also, can you run a tcpdump (with e1000) and check what is going on when the network disapperead? Best Regards,Strahil Nikolov В неделя, 12 януари 2020 г., 09:22:52 ч. Гринуич+2, Latchezar Filtchev <latcho@aubg.bg> написа: Dear Strahi, I tried rtl8139. The behavior is the same. Best, Latcho From: Strahil <hunter86_bg@yahoo.com> Sent: Sunday, January 12, 2020 1:19 AM To: Latchezar Filtchev <Latcho@aubg.bg>; users <users@ovirt.org> Subject: Re: [ovirt-users] Unstable VM network connectivity after upgrade 4.2.8 to 4.3.7 Hi Latcho, Most probably it's a bug. Have you tried virtio and/or rtl-based NIC ? As far as I know, CentOS 5 supports Virtio after Kernel >= 2.6.25 . Best Regards, Strahil Nikolov On Jan 11, 2020 19:54, Latchezar Filtchev <Latcho@aubg.bg> wrote: Hello Everyone, I am aware my guest OS is out of support but I experienced the following: oVirt – 4.2.8 (self-hosted engine) VM – CentOS 5.2; two VNIC’s ( driver used e1000) connected to different VLAN’s; - no issues with network connectivity After upgrade to oVirt 4.3.7 The same VM starts normally. Network is available for several seconds (10 – 20 pings) and then it disappears. The machine works but no ping to/from VM. When I am returning the same machine (via export domain) to oVirt 4.2.8 environment – it works as expected. Can someone advise on this? Any help will be greatly appreciated. Thank you. Best, Latcho _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/DAPMFAA3XZOUJ2...
Hi Strahil, Unfortunately virtio drives cannot be used. Guest OS is CentOS 5.2, kernel 2.6.18-92.1.17.el5.centos.plusPAE The network connectivity of the VM is very short (please see below). Till I connect the VM (via spice) network connectivity is already gone. tcpdump –I eth0 –v tcpdump: listening on eth0, link-type EN10MB ( Ethernet ), capture 96 bytes 0 packets captured 0 packets received by filer 0 packets dropped by kernel From 172.17.17.7 icmp_seq=60 Destination Host Unreachable From 172.17.17.7 icmp_seq=61 Destination Host Unreachable From 172.17.17.7 icmp_seq=62 Destination Host Unreachable From 172.17.17.7 icmp_seq=63 Destination Host Unreachable From 172.17.17.7 icmp_seq=64 Destination Host Unreachable From 172.17.17.7 icmp_seq=65 Destination Host Unreachable 64 bytes from 172.17.16.16: icmp_seq=66 ttl=64 time=2.19 ms 64 bytes from 172.17.16.16: icmp_seq=67 ttl=64 time=0.567 ms 64 bytes from 172.17.16.16: icmp_seq=68 ttl=64 time=0.339 ms 64 bytes from 172.17.16.16: icmp_seq=69 ttl=64 time=0.337 ms 64 bytes from 172.17.16.16: icmp_seq=70 ttl=64 time=0.288 ms 64 bytes from 172.17.16.16: icmp_seq=71 ttl=64 time=0.305 ms 64 bytes from 172.17.16.16: icmp_seq=72 ttl=64 time=0.293 ms 64 bytes from 172.17.16.16: icmp_seq=73 ttl=64 time=0.346 ms 64 bytes from 172.17.16.16: icmp_seq=74 ttl=64 time=0.359 ms 64 bytes from 172.17.16.16: icmp_seq=75 ttl=64 time=0.479 ms 64 bytes from 172.17.16.16: icmp_seq=76 ttl=64 time=0.391 ms 64 bytes from 172.17.16.16: icmp_seq=77 ttl=64 time=0.302 ms 64 bytes from 172.17.16.16: icmp_seq=78 ttl=64 time=0.327 ms 64 bytes from 172.17.16.16: icmp_seq=79 ttl=64 time=0.321 ms From 172.17.17.7 icmp_seq=125 Destination Host Unreachable From 172.17.17.7 icmp_seq=126 Destination Host Unreachable From 172.17.17.7 icmp_seq=127 Destination Host Unreachable From 172.17.17.7 icmp_seq=128 Destination Host Unreachable Thank you! Best, Latcho From: Strahil Nikolov <hunter86_bg@yahoo.com> Sent: Sunday, January 12, 2020 12:52 PM To: users <users@ovirt.org>; Latchezar Filtchev <Latcho@aubg.bg> Subject: Re: [ovirt-users] Re: Unstable VM network connectivity after upgrade 4.2.8 to 4.3.7 Hi Lacho, Can you run the virtio drivers ? They are the most tested in KVM . Also, can you run a tcpdump (with e1000) and check what is going on when the network disapperead? Best Regards, Strahil Nikolov В неделя, 12 януари 2020 г., 09:22:52 ч. Гринуич+2, Latchezar Filtchev <latcho@aubg.bg<mailto:latcho@aubg.bg>> написа: Dear Strahi, I tried rtl8139. The behavior is the same. Best, Latcho From: Strahil <hunter86_bg@yahoo.com<mailto:hunter86_bg@yahoo.com>> Sent: Sunday, January 12, 2020 1:19 AM To: Latchezar Filtchev <Latcho@aubg.bg<mailto:Latcho@aubg.bg>>; users <users@ovirt.org<mailto:users@ovirt.org>> Subject: Re: [ovirt-users] Unstable VM network connectivity after upgrade 4.2.8 to 4.3.7 Hi Latcho, Most probably it's a bug. Have you tried virtio and/or rtl-based NIC ? As far as I know, CentOS 5 supports Virtio after Kernel >= 2.6.25 . Best Regards, Strahil Nikolov On Jan 11, 2020 19:54, Latchezar Filtchev <Latcho@aubg.bg<mailto:Latcho@aubg.bg>> wrote: Hello Everyone, I am aware my guest OS is out of support but I experienced the following: oVirt – 4.2.8 (self-hosted engine) VM – CentOS 5.2; two VNIC’s ( driver used e1000) connected to different VLAN’s; - no issues with network connectivity After upgrade to oVirt 4.3.7 The same VM starts normally. Network is available for several seconds (10 – 20 pings) and then it disappears. The machine works but no ping to/from VM. When I am returning the same machine (via export domain) to oVirt 4.2.8 environment – it works as expected. Can someone advise on this? Any help will be greatly appreciated. Thank you. Best, Latcho _______________________________________________ Users mailing list -- users@ovirt.org<mailto:users@ovirt.org> To unsubscribe send an email to users-leave@ovirt.org<mailto:users-leave@ovirt.org> Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/DAPMFAA3XZOUJ2...
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Strahil Nikolov