similar to: kvm: centos 7 guest on centos 6 host network problems

Maybe my google-fu is failing me, but I have spent the past couple hours looking at how to add a vnet? Device to my KVM host running CentOS 6, and for the life of me I can't get this going. >From all my research if I want to add a device I should just do 'brctl addif br1 vnet14' if I want to add a vnet14 to bridge br1. When I do this, I get: # brctl addif br0 vnet14

Tried that as well, but this has to be something that gets set at the OS level and loaded, as if you look at dmesg output, you can see all the vnet?? nodes as the OS comes online. So the question is, what is virt-install doing that creates the needed vnet interface that is part of the bridge. I really had to kill and reload the VM just to load a second interface.. --- Howard Leadmon

How do you decide what MAC address to use for that VM interface? As I just tried to change the MAC to some other value close, like I made '52:54:00:34:e1:21' into say '52:54:00:34:e1:32', and when I try and load it in, I get the following: error: XML error: Attempted double use of PCI Address '0:0:4.0' Here is one of my network entries: <interface

I would stop the VM, edit its definition file (that's an XML file) and then start it up. But be careful: After you edit the XML file, you need to execute a command so KVM re-reads that file. I forgot that command, but you can look it up on Google. On Dec 9, 2015 7:52 AM, "Howard Leadmon" <howard at leadmon.net> wrote: > > > Maybe my google-fu is failing me, but I have

You most definitely do not need to destroy and re-create a VM just to add a 2nd network interface. I don't think those vnet interfaces got created by the host OS. I believe those are created by KVM (or libvirt) when you start a VM. I could be wrong though. But I just checked on my CentOS 6 KVM host machine and I see as many vnet interfaces as many VMs are currently running (or if one VM

Hi, I'm not sure but I think I suffer under the same problem with a bit different setup with squeeze testing and xen 4.0rc5. In fact I'm using bridges in the dom0 and the connections to the domU get lost sporadically. In don't see where's a solution to the problem... Is it now a bug? When it's an iptables bug, where's the corresponding bug in the iptables bugtracker

BTW, adding a 2nd virtual nic to a guest can also be done with command line tools (I just googled this for you) : https://kashyapc.fedorapeople.org/virt/add-network-card-in-guest.txt ( It came up as 1st result when I searched for: virsh add network interface to existing guest ) But if you look at the bottom of this guide, they also mention that if something goes wrong, they resort to using

Pardon me for a long detailed post but this looks pretty serious. The bottom line is that, when I attempt to shut down or reboot my simple xen-2.0.7 server running FC3 with two domUs, shutting down xendomains appears to send python into an infinite loop. This may be due to a serious misconfiguration on my part but it is certainly a big problem. If we shutdown the domUs manually first, the

I can see from different post that if working with sr-iov, i should work with vlan Is this an obligation to work with vlan if working with sr-iov? If not according to which parameter will the different vf get the traffic. Let's say i declare max_vfs=7, how will the traffic be seperated between the vm? However till i get an answer i tried to work with vlan And i still don't get

Hi, I have an old system. The guest there is defined with: ? <os> ??? <type arch='x86_64' machine='pc-q35-rhel8.2.0'>hvm</type> ? </os> When I try to migrate this guest to a new system I get the error: error: internal error: unable to execute QEMU command 'blockdev-add': Failed to connect socket: Permission denied On the new host I see the

On 9/9/20 7:13 AM, Paul van der Vlis wrote: > Hello, > > I want to do some testing and I have removed two VM's from the bridge > what connects them to internet, and added them to another isolated > bridge what's not connected to internet. Problem is that I cannot reach > the other host in the isolated network. > > Something like this: > > virsh shutdown

Hi, I''m using CentOS 5.5 x86_64 xen 3.43 from gitco.de and I have an Openvox A1200P voip card and am passing it thru to another centos 5.5 DomU, when I 1st start the domain driver loads and everything seems quite nice and the device works, but after a reboor of the DomU, this is shown on my Dom0 dmesg Here''s Dom0 info [root@xen ~]# dmesg Bootdata ok (command line is ro

Hi, I''m using CentOS 5.5 x86_64 xen 3.43 from gitco.de and I have an Openvox A1200P voip card and am passing it thru to another centos 5.5 DomU, when I 1st start the domain driver loads and everything seems quite nice and the device works, but after a reboor of the DomU, this is shown on my Dom0 dmesg Here''s Dom0 info [root@xen ~]# dmesg Bootdata ok (command line is ro

Even more puzzling, I reverted back to the old configuration to confirm what I had seen and found that it works in one direction but not the other: i.e. from 192.168.0.110 to 192.168.0.120, but not the other way around. Must be something with my configuration....which I can follow up on. So, thanks again for your help. Richard On 12/3/19 11:36 AM, Richard Achmatowicz wrote: > Laine >

Hi there :) I would like to submit a use case we are here: our company make network probes with 1 administravia interface and the rest in promiscuous mode to listen traffic. I've made virtualized server with Qemu. All Qemu instances (with 2 tap) listen on: br0 (admin int) br1 (receive traffic) The need is each tap on br1 must listen *all* traffic (unicast, multicast...). For this, I sets

Hi Laine What you have suggested sounds eminently reasonable. Thanks for your advice. I'm going to give it a shot and report back. Richard On 11/27/19 1:38 PM, Laine Stump wrote: > On 11/26/19 11:07 PM, Richard Achmatowicz wrote: >> Hello >> >> I have a problem with attaching VMs to a VLAN interface. >> >> Here is my setup: I have several physical hosts

Hello I have a problem with attaching VMs to a VLAN interface. Here is my setup: I have several physical hosts connected by a physical switch.  Each host has two NICs leading to the switch, which have been combined into a team, team0. Each host a has a bridge br1, which has team0 as a slave. So communication between hosts is based on the IP address of bridge br1 on each host. Up until

Hi, I''m setting up my first xen machine, and I''m trying to setup two Virtual Machines, each mapped to a physical adapter on a different network. The virtual machine mapped to xen-br0 and eth0 works fine. However, when I bring up a VM with this configuration file: ----------------- name = "test77" kernel = "/boot/vmlinuz-2.6.11.12-xenU" root =

[desktop] ----- lan ----eth0 [notebook] eth1 192.168.?.? ` ----- wlan ---- [speedport(hub and router)] -- internet 192.168.2.x So on my laptop I have eth0 beeing lan, eth1 beeing wlan ethernet card. When only using eth0/1 everything is fine. Now I want to be able to use internet from both [desktop] and [notebook]. Typically you set up a bridge with

hi all, (this events ocurred before my previous mail about the uuid incident) so, I installed a vm host: rhel6 guest: centos6 network: bridge (br0, eth1 as slave) but then, I changed the name of the bridge from br0 to br1 (because br1<->eth1 seems pretty than br0<->eth1) so: - mv /etc/sysconfig/network-scripts/ifcfg-br0 /etc/sysconfig/network-scripts/ifcfg-br1 - edited