similar to: RX dropped packets on guests subnets

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

I'm trying to migrate my VirtualBox test lab to KVM. In my VB configuration, I have several VM routers with 4 interfaces each. Each router has a bridged interface which connects them all together and to the outside world. I have servers/clients dispersed on each of the other private (Isolated) segments that use the routers as default gateways. In trying to make this work, I used Virtual

On Tue, Jun 20, 2017 at 10:05:19AM +0200, Martin Kletzander wrote: >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

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

Lesson learned. I think I had the same IP address assigned to my VM router as I did the Host. Side question: where are the virtual networks stored when you create them w/VM Manager? -----Original Message----- From: Spanky Horawitz <shorawitz@gmail.com> Reply-to: shorawitz@gmail.com To: libvirt-users@redhat.com Subject: Isolated networks && test lab Date: Tue, 25 Aug 2015 17:17:56

Hello, I would like to set a specify default gateway for my VMs. However I’m not succeeding Here after is the isolated lan, where I added the statement <route address='10.0.0.0' prefix='8' gateway='10.10.0.7’/> where my aim is to route to the 10.10.0.7 What should I do , to make it works ? Thanks <network> <name>prd-private-lan</name>

I think I've hit the same problem that Predrag reported in http://comments.gmane.org/gmane.comp.emulators.libvirt.user/8825. With libvirt-1.3.2-1.fc23.x86_64 on Fedora 23, when I try uploading an image with vol-upload to a user libvirtd (qemu:///session): virsh vol-upload --pool default volume.qcow /path/to/file.qcow2 I am getting: error: Disconnected from qemu:///session due to

Hi, I've been trying to migrate some of my CentOS 7 KVM hypervisors to CentOS 8, and I have encountered the following issue while trying to load my network config: virsh:     error: Failed to start network test1     error: internal error: Network is already in use by interface virbr2 journalctl:     error : networkCheckRouteCollision:123 : internal error: Network is already in use by

I am trying to create a separate private network between the host (domain 0) and the guests. Using virsh, I created a bridge network, virbr1. I can successfully add guest interfaces to the bridge network and communicate between the guests. However, I am unable to communicate between the host and any of the guests. I created eth0:1 on the host and configured virbr1 to forward to eth0:1

Hi everyone. Those are the iptables forwarding rules associated with the two virtual networks on my machine: ----------------------------------------------------------------------------------------- -A FORWARD -d 192.168.100.0/24 -o virbr1 -m state --state RELATED,ESTABLISHED -j ACCEPT -A FORWARD -s 192.168.100.0/24 -i virbr1 -j ACCEPT -A FORWARD -i virbr1 -o virbr1 -j ACCEPT -A FORWARD -o

Hello All- I've looked in several places and haven't found an answer to this question: is it possible to have libvirt add custom rules to iptables for virtual network interfaces? I took a look at the "Firewall and Network Filtering in Libvirt" page and it seems overly complicated for what I want to do. Given an interface virbr2 and its network 192.168.4.0/24, libvirt installs

On Fri, Mar 04, 2016 at 04:57:30PM +0000, Daniel P. Berrange wrote: > What version of libvirt ? We had an unfortunate implementation mistake > which caused us to waste tonnes of time in memmove(). versions since > 1.2.19 have a fix that addresses it Ah, this is on F23, which has: libvirt-1.2.18.2-2.fc23.x86_64 There's nothing more recent right now in either updates or

Hi all, I have 3 guests (2-RHEL4 and 1 RHEL6) and have some issues regarding networking between them. The 2 RHEL4 system's use default bridge virbr0 and get ip's of range 192.168.122.0/24 (192.168.122.207, 192.168.122.167) I created another bridge (virbr1) with NAT forwarding (no dhcp). The network i choose was 192.168.100.0/24. And the third system (RHEL6) was assigned static ip-addres

On 06/20/2017 05:27 AM, Martin Kletzander wrote: > On Tue, Jun 20, 2017 at 10:05:19AM +0200, Martin Kletzander wrote: >> 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

Hi. I have a machine with a local DHCP server and a couple of virtual networks and I've configured the server for each virtual interface, so that I would be able to install VMs on the corresponding subnets using PXE. The problem is that the two DHCP servers (my local server and dnsmasq) are conflicting with each other causing the boot process to either fails or takes ages untill a VM can

hello list, i cant create an isolated network with the virt-manager. installed version virt-manager 3.0.0 installed version libvirt 6.2.0 output in error-message: Error creating virtual network: internal error: Failed to apply firewall rules /sbin/iptables -w --table filter --insert LIBVIRT_INP --in-interface virbr3 --protocol tcp --destination-port 67 --jump ACCEPT: iptables: No

Hi everyone! It's the first time I send a message to this list, I hope it's not the last :) So my issue is that when booting a disk image generated with virt-builder [1] it takes more than 5 minutes, waiting in the boot screen that says: " Booting from disk... press any key to continue. " The press any key message shows up to 5 times. The issue is that it stays in that screen

I just wrote this to assist some Red Hat folks understanding what libvirt does with iptables, and thought it is useful info for the whole libvirt community. When I have time I'll adjust this content so that it can fit into the website in relevant pages/places. Firewall / network filtering in libvirt ======================================= There are three pieces of libvirt

I have created a routed virtual network. From within the routed net, DNS requests to the dnsmasq interface virbr2 work fine. On the libvirt host, DNS requests to the dnsmasq interface virbr2 work fine. I would like to allow external hosts, on the same network as the libvirt host, to query the dnsmasq interface. However external DNS queries to the virbr2 interface time out. The iptables firewall

hasm> Every few minutes windbindd posts an error message like: hasm> winbindd: ../source3/libads/ldap.c:552(ads_find_dc) hasm> winbindd: ads_find_dc: name resolution for realm 'XXX.CO' hasm> (domain 'XXX_01') failed: NT_STATUS_NO_LOGON_SERVERS hasm> How can I shut this thing up? I've also seen, not sure hasm> whether related, winbindd shooting up to