similar to: Routing setup questions

A CentOS 6.3 box ("host") runs several KVM virtual machines, each of which has two interfaces attached to the two bridges br1 and br2 (and each thus has two IP's; one on 192.168.0.0/22 and one on 192.168.4.0/22); net.ipv4.ip_forward on the host is 1. Simplified diagram: host +---------------+ |

I'm using director on dovecot 2.0 At present, I know that two instances are connected, If I stop of one system, then I can watch how to the connections are closed on port 5000. I defined 5000 as director port. I have one user (user1) connected to kvm1 (192.168.13.100) and kvm2 (192.168.13.101) servers v?a telnet telnet kvm1 143 and then login telnet kvm2 143 and then login If try to

I've spent some hours on this without success - any help greatly appreciated. I've just done a new RHEL6 setup, with a KVM guest (first time). The basic installation works fine until I start libvirtd; at this point, the host machine loses access to the external network: step 1: ping from host to network works; external machine on network can ping both eth0 and br1 on the host step

Adding Paolo and Miroslav. On Sun, Mar 12, 2017 at 11:41 PM, Philip Prindeville < philipp_subx at redfish-solutions.com> wrote: > Hi. > > I have a Supermicro 5018D-FN4T (Xeon D-1541 based SBC) that I use for > virtualization. I?m running Centos 7.3 on it (updated), with the > CentOS-QEMU-EV.repo repository as the source for virtualization packages. > > I run an Ubuntu

Hi. I have a Supermicro 5018D-FN4T (Xeon D-1541 based SBC) that I use for virtualization. I?m running Centos 7.3 on it (updated), with the CentOS-QEMU-EV.repo repository as the source for virtualization packages. I run an Ubuntu 16.04-2 guest VM on it, which is ordinary enough. What?s perhaps less ordinary is that I?ve attached a Lexar Media, Inc. ?Lexar Professional Workflow CR1 CFast 2.0 USB

Hello, I have an NETYS RT 1/1 UPS, which is not fully supported. Starting snmp driver displays: [root at kvm1 ~]# snmp-ups -a local Network UPS Tools - Generic SNMP UPS driver 0.66 (2.6.4) Duplicate driver instance detected! Terminating other driver! No matching MIB found for sysOID '.1.3.6.1.4.1.2254.2.4'! Please report it to NUT developers, with an 'upsc' output for your

Hello, I have an NETYS RT 1/1 UPS, which is not fully supported. Starting snmp driver displays: [root at kvm1 ~]# snmp-ups -a local Network UPS Tools - Generic SNMP UPS driver 0.66 (2.6.4) Duplicate driver instance detected! Terminating other driver! No matching MIB found for sysOID '.1.3.6.1.4.1.2254.2.4'! Please report it to NUT developers, with an 'upsc' output for your

Hi list, i use a centos 7 as virtual host with two guests with windows 2012 standard ( as storage i use RAW files). My problem is that sometime during the bakup my server reboot without leaving information in the log files ( /var/log/messages ). The backup does this steps: 1) Save the state of the virtual guest ( with the command "virsh save " ) 2) Make a snapshot of the filesystem (

There's got to be a simple way to attach an ISO to a KVM guest. I just haven't yet discovered it. I've tried adding the following stanza to my guest XML file, under the <devices> stanza and starting the guest: <disk type='file' device='cdrom'> <driver name='qemu' type='raw' /> <source

1. I run a user domain like this: [root@kvm1 ~]# qemu-system-x86_64 -enable-kvm -m 1G -smp 4 /images/test1.img WARNING: Image format was not specified for '/images/test1.img' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to

Hi, I have a KVM server running on Centos 7.5. [root at kvm2 ~]# cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) Qemu packages are from Centos repository. [root at kvm2 ~]# rpm -qa|grep qemu libvirt-daemon-driver-qemu-3.9.0-14.el7_5.7.x86_64 qemu-img-1.5.3-156.el7_5.5.x86_64 qemu-kvm-common-1.5.3-156.el7_5.5.x86_64 ipxe-roms-qemu-20170123-1.git4e85b27.el7_4.1.noarch

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

Howdy! I have virtual domains running under libvirt. I have a valid xml definition and it starts fine, except when I add the filterref line as below <interface type='bridge'> <mac address='54:52:00:44:36:d7'/> <source bridge='vlan50'/> <target dev='guest_if0'/> <model type='virtio'/>

When I start my script: * - Creating classes on br1 for upload control ... * - tc class add dev br1 parent 2:0 classid 2:46 hfsc ls m1 576.0Kbit d 2000ms m2 192.0Kbit ul m2 384Kbit ... [ ok ] * - tc class add dev br1 parent 2:46 classid 2:47 hfsc sc umax 1500b dmax 30ms rate 80Kbit . [ ok ] * - tc class add dev br1 parent 2:46 classid 2:48 hfsc ls m2 152.0Kbit ul m2 152.0Kbit

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 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

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 =

I have been looking at this problem on and off for a considerable period. Given my lack of knowledge I have been unable to resolve this quickly and in consequence it has been constantly shoved to the background as other issues arise. Here is the situation: I have two dual-homed kvm hosts both running CentOS-6.7 and identically configured. These are connected to the same LAN segment via

Hi all, I'm currently in the process of building a 2-Node libvirt/KVM Cluster and ran into some issues regarding the network connectivity of our virtual machines. Our setup seemed to work fine, we were able to browse to Google and our own company website and some others from within the VM. Then we tried microsoft.com to download some Windows iso images from MS Partner Network. The page