similar to: How to set the MTU size of VM interface

On Thu, Jul 12, 2018 at 4:46 AM, netsurfed <zhuohaofan@126.com> wrote: > Dear all: > I start a VM with MTU size 1450, and login VM to check the mtu size, but > this setting didn't work. > > [snip] > However, the actual mtu size of VM is still 1500, as following: > > root@ubuntu-zhf:~# ip addr > > [snip] > I use ovs to create vxlan networks and add

Hey there, I hope anyone can bring some light in the following problem. <interface type='bridge'> <source bridge='cloudbr0'/> <mtu size='2000'/> <mac address='02:00:74:76:00:01'/> <model type='virtio'/> <virtualport type='openvswitch'> </virtualport> <vlan trunk='no'> <tag

Hello Libvirt Users, I would like to setup a two node bare-metal cluster. I need to guidance on the network configuration. I have attached a small diagram, the same diagram can be seen here: https://i.imgur.com/SOk6a6G.png I would like to configure the following details: - Each node has a DHCP enabled guest network where VMs will run. (eg, *192.168.1.0/24 <http://192.168.1.0/24>* for

From: Eric Dumazet <edumazet at google.com> Straightforward patch to add GRO processing to virtio_net. napi_complete_done() usage allows more aggressive aggregation, opted-in by setting /sys/class/net/xxx/gro_flush_timeout Tested: Setting /sys/class/net/xxx/gro_flush_timeout to 1000 nsec, Rick Jones reported following results. One VM of each on a pair of OpenStack compute nodes with

From: Eric Dumazet <edumazet at google.com> Straightforward patch to add GRO processing to virtio_net. napi_complete_done() usage allows more aggressive aggregation, opted-in by setting /sys/class/net/xxx/gro_flush_timeout Tested: Setting /sys/class/net/xxx/gro_flush_timeout to 1000 nsec, Rick Jones reported following results. One VM of each on a pair of OpenStack compute nodes with

Hi Michal, Thanks for your answer. I don’t understand why an interface created without mtu gets only 1500 visible in the virtual machine but if I create an interface with mtu higher than 1500 e.g. 2000 the bridge will change too. Before the bridge was e.g. by 9000. I ask because you wrote if I don’t set an mtu of the interface I will get the mtu of the bridge. But it seems so. Can you clarify

Hi all, When I created a virtual machine using virDomainCreateXML, with virtualport type was openvswitch, and virtual machine creation failed. The error message is: internal error: Child process (/sbin/tc filter add dev vnet110 parent ffff: protocol all u32 match u32 0 0 police rate 0kbps burst 0kb mtu 64kb drop flowid :1) unexpected exit status 2: RTNETLINK answers: Invalid argument The

On 10/05/2019 14:44, Michal Privoznik wrote: > On 5/10/19 3:26 PM, lejeczek wrote: >> hi guys >> >> I have a qemu guest and openvswitch bridge and the guest fails to start: >> >> $ virsh start work8 >> error: Failed to start domain work8-vm-win2016 >> error: Cannot get interface MTU on 'ovsbr0': No such device > > Well, this means that

Hi all: Unable to install libvirt v5.5.0 correctly through the source code which clone from git. The error message is shown below. libtool: install: (cd /home/libvirt/src; /bin/sh /home/libvirt/libtool --silent --tag CC --mode=relink gcc -std=gnu99 -I/usr/include/libxml2 -fno-common -W -Waddress -Waggressive-loop-optimizations -Wall -Wattributes -Wbad-function-cast -Wbuiltin-macro-redefined

Hi Peter and other Libvirt-Users, Thank you, I greatly appreciate your response. The diagram I provided may be a little misleading, so I have attached a new diagram (also available here: https://i.imgur.com/X3nFMCz.png ). I think I also need to provide some more detail about my scenario here: These physical nodes are provided to me by "bare-metal cloud" providers like Scaleway / OVH /

On 7/23/19 8:00 PM, Sven Vogel wrote: > Hey there, > > I hope anyone can bring some light in the following problem. > > <interface type='bridge'> > <source bridge='cloudbr0'/> > <mtu size='2000'/> > <mac address='02:00:74:76:00:01'/> > <model type='virtio'/> > <virtualport

On Fri, Feb 14, 2020 at 8:05 PM Andre Goree <agoree@staff.atlantic.net> wrote: > I wanted to know if it's possible to use OVN networking and virtio > simultaneously in the same VM? Or am I wasting my time trying to get it to > work? > > In oVirt 4.x I was able to do it and also to intermix normal vnic and OVN based vnic. I needed to reproduced a problem I had in a

Hello World, I have met tinc a few days ago and started with a simple connection between 2 machines. I have fallen in love witht tinc, it's very simple to configure, although I haven't used tinc in production yet, because of its simplicity I think it's very robust. I also like how the configuration is organized with hosts/ directory, up/down scripts. Thank you for such a great tool.

Dear Michal: I'm sorry. The pasting XML I described earlier is wrong, and the real thing is: <interface type='bridge'> <mac address='52:54:00:0a:2b:2a'/> <source bridge='lcs_br_1'/> <virtualport type='openvswitch'/> <bandwidth> <inbound average='0' peak='0'/>

Commits: fd2a0437dc33 virtio_net: introduce virtio_net_hdr_{from,to}_skb e858fae2b0b8 virtio_net: use common code for virtio_net_hdr and skb GSO conversion introduced a subtle (but unexplained) difference in how virtio_net flags are derived from skb->ip_summed fields on transmit from the guest to the host/backend. Prior to the patches the flags would be set to VIRTIO_NET_HDR_F_NEEDS_CSUM if

Commits: fd2a0437dc33 virtio_net: introduce virtio_net_hdr_{from,to}_skb e858fae2b0b8 virtio_net: use common code for virtio_net_hdr and skb GSO conversion introduced a subtle (but unexplained) difference in how virtio_net flags are derived from skb->ip_summed fields on transmit from the guest to the host/backend. Prior to the patches the flags would be set to VIRTIO_NET_HDR_F_NEEDS_CSUM if

Hi I would like to add rules into the iptables of the Hosted Engine VM in Ovirt. the version is oVirt Engine Version: 4.1.1.8-1.el7.centos I have tried using the normal process for iptables (iptables-save etc), but it seems that the file /etc/sysconfig/iptables this is ignored in the Ovirt Engine VM. How can I add permanent rules into the Engine VM? Kind regards Andrew

Thanks Laine, I will take a look at Open vSwitch, it looks interesting. I am a generalist, I need to know enough about a lot of things to get many different tasks done, but do not have the in depth knowledge required to "patch" anything.  If I manage to wrangle a working solution should I post it? Needless to say I would be supportive of said feature being implemented by those

hi guys I have a qemu guest and openvswitch bridge and the guest fails to start: $ virsh start work8 error: Failed to start domain work8-vm-win2016 error: Cannot get interface MTU on 'ovsbr0': No such device LXC guest which uses the same source network starts just fine. I'm on Centos 7 with openvswitch-2.9.0-3.el7.x86_64 from centos-openstack-pike repo and

In general if no MTU is set on interface creation the default value is 1500. On OVS the bridge MTU is automatically set to the smallest port MTU. So you just have to set the MTU of each port of the bridge. Take a look at: https://bugzilla.redhat.com/show_bug.cgi?id=1160897 It is a bit of a pain to read but seems to confirm the statement about the OVS MTU value being set by the MTU of the