similar to: Centos 7 KVM questions

hi everybody I have a simple network: <network> <name>default</name> <uuid>1e71fa47-4893-4435-8b60-575d2b51c231</uuid> <forward mode='nat'> <nat> <port start='1024' end='65535'/> </nat> </forward> <bridge name='virbr0' stp='on' delay='0' /> <mac

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Hi list, I searched the web for bug reports regarding this phenomenon I see on *multiple* machines of a customer, however, I didn't find an exact fit. So, I'd like to ask here whether anyone else has run into this. I have multiple CentOS 6 machines running using KVM to virtualize a bunch of machines on them (LVM-based). Software releases

I'm looking for some information regarding the interaction of KVM, VLANs, firewalld, and the kernel's forwarding configuration. I would appreciate input especially from anyone already running a similar configuration in production. In short, I'm trying to figure out if a current configuration is inadvertently opening up traffic across network segments. On earlier versions of CentOS

I have decided to migrate my latest KVM server to CentOS 6.0 and am beginning to get a little frustrated with some issues that worked perfectly in 5.6. Right now I've given up on getting virbr0 and NAT to work, but now I need networking bridging to work, but nothing seems to fix the issue. I have not had much experience with troubleshooting KVM so could really use some pointers on resolving

On Tue, Jun 20, 2017 at 02:26:59AM -0400, Travis S. Johnson wrote: >Hello, > >I came across an interesting problem in my home lab a few weeks ago as I'm >prepping for my RHCE exam using Michael Jang study guide. I've been at this >for days now, and I still can't wrap my head around how two or more virtual >networks in default NAT configuration are even allowed to

Hello CentOS mailinglist I am running CentOS 6.3 with qemu-kvm and libvirt. I was experimenting with bridged VM networking. Usually the VMs run over the network device virbr0. So i created a new bridge with brctl and added my eth0 to that bridge. Not touching virbr0 or it's configuration at all. Then i edited the configuration xml from my VM with 'virsh edit vmname'. After that i

I need some help in understanding libvirt's virtual networking. I have configured bridged networking (shared physical device) on libvirt+KVM system which is working fine. Also, I am using default NAT network on with virbr0 bridge device and virbr0-nic. I would like to get better understanding on virbr0-nic works in this virtual network configuration. I understand that traffic from virbr0

Hello, I came across an interesting problem in my home lab a few weeks ago as I'm prepping for my RHCE exam using Michael Jang study guide. I've been at this for days now, and I still can't wrap my head around how two or more virtual networks in default NAT configuration are even allowed to communicate with each other despite what the libvirt documentation said. Here's the

Am 01.04.2020 um 21:56 schrieb Jerry Geis: > Thanks for the info. > > brctl show virbr0 > bridge name bridge id STP enabled interfaces > virbr0 8000.525400fc34af yes virbr0-nic > > brctl show virbr1 > bridge name bridge id STP enabled interfaces > virbr1 8000.5254009c3902 yes

Hello, I'm a little confused on which networking option I need to choose when setting up a VM. I set up two VMs this past weekend both with NAT. Both able to were access the internet. The first one, I created in my / file system but didn't really have the space so I deleted it. The second one, I created in /home/kvm, but deleted it as well when I couldn't access it FROM the

All of a sudden, Virtual Machine Manager (VMM) on a CentOS 5.7 load will no longer run any VMs. The VM worked A-OK on the morning of 23 Feb, when I brought it up, applied the Microsoft updates, rebooted it, installed an application, rebooted again and ran several tests. Later that day, it wouldn't run. I didn't have time to diagnose, so I did some investigation a few minutes ago. Working

CentOS-6.5 i86_64 qemu-kvm-0.12.1.2-2.415.el6_5.4 MS-Windows v7proSP1 We have installed a MicroSoft Win7 system as a guest and have joined it to our MS AD domain. The system runs and has internet access. However, the IPv4 address it obtains and the gateway it is assigned are both sourced from the virtual machine host system and not from our AD DC DHCP server. To clarify, the virbr0 IP address

Hi, I have an fc14 install and would like to install a few kvm guests but am having difficulty with the networking. On the host I have disabled NetworkManager and configured a bridge which has eth0, the only physical interface on the server. I have a dhcp server on the local lan, and if I add a mac address entry to my dhcpd.conf, the guest will find an IP from there. I think somehow the guest

Good morning, list, I've been trying to get my KVM virtual machines to connect to the Interwebs for the last 3 hours with no success. I'm running Debian Wheezy (fully patched) and building virtual machines using KVM in Virt Manager. With the default, factory settings shown in virt manager, I have a default virtual network with the device name virbr0, which starts on boot and uses the

hi everybody my mind must have gone blank & eyes blind, I'm hoping it's simple and somebody can shed the light on bit I cannot see. a regular default net: <network> <name>default</name> <uuid>4c0a0c44-7e8a-493b-a57c-87cd38eaa0f7</uuid> <forward mode='nat'/> <bridge name='virbr0' stp='on'

I have these interfaces listed. eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.1.8 netmask 255.255.252.0 broadcast 192.168.3.255 inet6 fe80::e2d5:5eff:fe63:abe5 prefixlen 64 scopeid 0x20<link> ether e0:d5:5e:63:ab:e5 txqueuelen 1000 (Ethernet) RX packets 42411243 bytes 4701898681 (4.3 GiB) RX errors 0 dropped 156

Looking at switching over from vmware and need to stand up a kvm install, I really would like to wait for rhel6 but not sure when it may show up....but what I would like to know what is the latest KVM that I can run with 5.5 and what are the best management tools to use, I looked at the wiki but it also referenced the redhat doc's....would like to run the para virt drivers if possible....any

I've got a Centos guest and a Windows 2003 server guest running in Xen under Centos (5.2 in both cases), and they can get out to the network, and I can ping them from dom0. This is my first Xen install, and I haven't used Linux as a router before (I'm very familiar with it as a webserver and development platform) so I'm a bit weak on the bridging code and NAT / IP masquerading.

>> Are you sure the vmware NIC is configured as bridged, not NAT on the host side? Not really. Does it help if I say I'm using the same Network Adapter configuration with which another VM in same subnet works fine? I've added a screen shot if that helps, though I think it shows the guest config and not host which you questioned.PicPaste - Untitled3-cJQlcohB.png | ? | | ? | ? | ? | ?

Hi, I have being try to connect a virtual machine to the outside through a bridge on the host. The following shows that I have a bridge. And I'm able to start a guest. pengy@rigel:~$ brctl show bridge name bridge id STP enabled interfaces br0 8000.c81f66e29049 no em4 br1 8000.c81f66e29045 no bond0 virbr0 8000.000000000000 yes