similar to: Network configuration on KVMs

hi, we like to use our server to host many guest system. we use these guests as test for our product testing which can be installed trough pxe install (we reinstall these guest very often). unfortunately it''s not possible to use routed network with pxe boot. so we _need_ bridged setup kvm with config as described in:

Hi, Following the directions for setting up bridged networking in the red hat virtualization guide and libvirt wiki, I set the following kernel parameters to 0 on a RHEL 5.5 server. net.bridge.bridge-nf-call-ip6tables net.bridge.bridge-nf-call-iptables net.bridge.bridge-nf-call-arptables Unfortunately, doing this broke the port forwarding I'd set up for VMs on my NAT networks, e.g.

Hello all, Basically my problem is how can i access a virtual machine from local network. I am able to do so from the host PC put not from other PC's on the same network. here is my what i did so far (http://wiki.libvirt.org/page/Networking#NAT_forwarding_.28aka_.22virtual_networks.22.29) cat '/etc/libvirt/qemu/networks/default.xml' <network>

The network-bridge script fails when setting a few sysctls which are only available if ebtables is present in the host kernel. Fix by ignoring the return value of the sysctl command. Signed-off-by: Avi Kivity <avi@qumranet.com> Index: xen/tools/examples/network-bridge =================================================================== --- xen/tools/examples/network-bridge (revision 991)

I built a CentOS 6 machine to host several CentOS 6 guest servers. As all guests will be Internet facing I set up the host with two bridged NICs and assigned an Internet facing IP address to br0 and a local IP address to br1. Each guest was installed using br0 and br1 with virtio drivers. On each I assigned an Internet facing IP address to eth0 and a local IP address on eth1. So far so good. I

http://bugzilla.netfilter.org/show_bug.cgi?id=751 Summary: IPv6 bridging bug Product: iptables Version: unspecified Platform: x86_64 OS/Version: Gentoo Status: NEW Severity: normal Priority: P3 Component: ip6tables AssignedTo: netfilter-buglog at lists.netfilter.org ReportedBy: david at

I had a major HD failure and need to rebuild my host server and the virtual servers that resided on it. I am moving from CentOS 5.6 to CentOS 6.3. I am using the same configuration, as best as I can tell, that was working only hours ago on 5.6 but does not work on 6.3. My guest server can see network traffic on the bridged network device but I cannot seem to interact with it. Iptables turned

Hi, In RHEL5/6 we have been able to create bridges on our hyper-visor of a number of vlans (eg. em1 -> em1.483 -> br483) We would be able to see this br483 in the virt-manager drop down network choice at the end of creating a new host. On RHEL7 we are not using NetworkManager per the documentation[0] for bridges (and because it is not worth it). So a RHEL7 virt-manager (0.10.0) when

I have a tricky problem. I''m going to use Augeas, like here http://projects.puppetlabs.com/projects/1/wiki/Puppet_Augeas#/etc/sysctl.conf to maintain sysctl.conf. However, since iptables is already disabled, when I add more lines to sysctl.conf with augeas and run sysctl -p, the following lines (which are already there) cause a failure. # Disable netfilter on bridges.

Hi all, I order to reach maximum performance on my centos kvm hosts I have use these params: - On /etc/grub.conf: kernel /vmlinuz-2.6.18-164.11.1.el5 ro root=LABEL=/ elevator=deadline quiet - On sysctl.conf # Special network params net.core.rmem_default = 8388608 net.core.wmem_default = 8388608 net.core.rmem_max = 16777216 net.core.wmem_max = 16777216

On 09/28/2016 08:43 AM, tdukes at palmettoshopper.com wrote: > I have one of those free domains/DNS from no-ip.com, centos7vm.ddns.net > I plan to use as the host name. > > I want to be able to access this VM from the internet. ... > This is what I was seeing. Either it lands on the DSL router's login > page or the host's website. If you only have one address, you'll

Hi So after reading this, felt I should apply the fix to a CentOS6 VPS that I have. http://www.zdnet.com/article/linux-tcp-flaw-lets-anyone-hijack-internet-traffic/ The article doesn't talk about CentOS or Redhat, but I assume the problem is the same, and hoping the solution is the same. However that doesn't seem to be the case. [root at vps ~]# uname -r 2.6.32-042stab108.7 [root at

Hi all: I have some kvm host(rhel 6.4, 2.6.32-358.0.1.el6.x86_64), I ran several windows guest on it(more than 10 guest on one host and the guest os are win7-32/win7-64/win2k8), but the guest network kept down automatically, lost package. I tried virtio drive and e1000 drive,but it didn't work. However, when I run cmd.exe ping some other subnet ip it worked. The host and guest are connected by

On 03/20/2016 08:51 PM, Devin Reade wrote: > In a CentOS 7 test HA cluster I'm building I want both traditional > services running on the cluster and VMs running on both nodes On a purely subjective note: I think that's a bad design. One of the primary benefits of virtualization and other containers is isolating the applications you run from the base OS. Putting services other

Bernd wrote: > -----Original Message----- > From: libvirt-users-bounces@redhat.com [mailto:libvirt-users- > bounces@redhat.com] On Behalf Of Lentes, Bernd > Sent: Thursday, March 19, 2015 5:12 PM > To: libvirt-users@redhat.com > Subject: Re: [libvirt-users] still possible to use traditional bridge network > setup ? > > Laine wrote: > > ... > > Hi Laine,

> -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of Gordon Messmer > Sent: Thursday, September 29, 2016 11:47 AM > To: CentOS mailing list > Subject: Re: [CentOS] Virtualization Networking > > On 09/28/2016 08:43 AM, tdukes at palmettoshopper.com wrote: > > I have one of those free domains/DNS from

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

Hi, I have installed CentOS 6.2 x86_64 and KVM/Qemu and I have some troubles with network. The first case: ----------------- The configuration is: - CentOS 6.2 (hardware machine) has one Ethernet interface with static IP address (eth0). - Virtual machine has bridge network interface with eth0 interface on CentOS 6.2. This bridge is created using wizard integrated with virt-manager. - Bridge

Hi all, i have a xen 4.3 installation and would like to have a bridge bond szenario: *** eth0 eth1 | | bond0 | br0 | vif = [ ''bridge=br0,mac=xx:xx:xx:xx:xx:xx'' ] *** With the network script in debian wheezy *** /etc/network/interfaces auto bond0 iface bond0 inet manual slaves eth0 eth1

dear All, I'm facing this routing problem, the setup is actualy part of ltsp, but I think this problem is Centos-specific. The server is a Dell Poweredge R210. The install is standard 6.4, updated. I have one nic facing the public internet: vi /etc/sysconfig/network-scripts/ifcfg-em1 DEVICE=em1 BOOTPROTO=none HWADDR=d4:ae:52:c1:28:2b NM_CONTROLLED=no ONBOOT=yes TYPE=Ethernet