similar to: Re: Isolated bridge does not bridge

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

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

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

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

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

Stephen Hemminger, Yes,I use V2.4.17. Which patch can I use? Or can you tell me the reason,so that i can modify my Kernel.I use this kernel at the embeded system. >Haisen.Zhang wrote: > >>shemminger? >> >> I have a problem with brctl application,following is my operations: >> >> vconfig add eth0 3 >> >> brctl addbr br0 >> >>

Hi, i'm rather new to kvm. now i set up a centos 7 guest on a centos 6 kvm host. when i try to use bridged networking in the centos7 guest this works for the interface that uses eth1/br1 on the host. when i try to use a second interface in the guest with eth0/br0 on the host this brings the host interface down as soon as i do ip configuration in the guest (so it seems). eth0 shall have

I've run into a problem on my KVM host where a single guest will be unreachable to other guests on the same host. This host has 2 bridged devices and guests assigned to each have the same issue. I've noticed that when I can't reach the problematic guest, the ARP entry for that system is incorrect. This issue seems to only be a problem about 75% of the time when making connections

On Mon, Apr 27, 2020 at 10:13:37 +0200, Paul van der Vlis wrote: > Op 27-04-2020 om 09:02 schreef Peter Krempa: > > On Sat, Apr 25, 2020 at 16:40:35 +0200, Paul van der Vlis wrote: > >> Op 25-04-2020 om 16:00 schreef Paul van der Vlis: > >>> Hello, > >>> > >>> I have a qcow2 disk what needs to become increased. > >>> >

[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 there, I'm currently experiencing a minor problem using the bridge module under kernel 2.4.27 part of the Devil Linux distribution (http://www.devil-linux.org). The problem I am having is that when the bridge is unloaded during a reboot I receive the following errors in /var/log/messages: Nov 14 13:22:13 src@Devil kernel: unregister_netdevice: waiting for br0 to become free. Usage count =

On Thu, 2 Dec 2004 14:13:33 +0100 ncrfgs <ncrfgs@tin.it> wrote: > Hi, > > I'm using the great 802.1d Ethernet Bridging support via > brctl along with Universal TUN/TAP devices created with > openvpn on a GNU system with a vanilla 2.6.8.1 Linux > kernel. > > > To start it: > > /usr/sbin/brctl addbr br${X} > /sbin/ifconfig brX

<I apologize if this arrives twice... I sent it first from an non-subscribed address, don't know if that'll get to the list or not --JJ> Hi folks, I have an implementation question regarding bridging on a linux box between a catalyst trunk port and a cisco 26something w/802.1q subinterfaces. So right now, there's no vlan trunking going on on the link my bridging firewall sits

When I start xen dom0 I get that same dhcp address for eth0 and for xen-br0, dom0 can talk to the world. If I start each of my 3 domU''s mannually, each guest gets a xen-br0 vif with a dhcp address and all 3 can talk to the outside world and each other (my "flat network"). What I want is a tiered network with the first domU acting as a firewall with 3 nics vif = [

Hi, I've been encountering some problems with bridging under linux 2.6.12-9 (ubuntu Breezy Badger). Apologies for the newbie-ish email: problem is likely a config issues, but docs appear to be sparse and I can't find much reference to the problem/solution on the 'net; trial and error really isn't working... Am attempting to bridge an offsite network to the central

Laine I made the change and I can now ping across both bridges: br1 (192.168.0.0/24) and br1600 (192.168.1.0/24): br1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500         inet 192.168.0.110  netmask 255.255.255.0  broadcast 192.168.0.255         inet6 fe80::1e98:ecff:fe1b:276d  prefixlen 64  scopeid 0x20<link>         ether 1c:98:ec:1b:27:6d  txqueuelen 1000  (Ethernet)

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 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

I am experimenting with routing tables to obtain a little understanding of how things work. I have a kvm hypervisor host (KVM1) with two physical Ethernet nics configured as bridges (br0 and br1). KVM1 br0 is configured with a public ipv4 address [x.y.z.42/24] and br1 is configured with a private ipv4 address [192.168.216.42/24]. A second kvm hypervisor, KVM2, is similarly configured albeit with