search for: vnetx

...of a VM using the following syntax: <filterref filter='server-x'> <parameter name='IP' value='1.2.3.70'/> </filterref> additional iptable-rules are getting created. The problematic rule seems to be the following: -A libvirt-out -m physdev --physdev-out vnetX -g FO-vnetX which should trigger the following rules: -A FO-vnetX -p all -m state --state ESTABLISHED -j ACCEPT -A FO-vnetX -p tcp --dport 22 -m state --state NEW -j ACCEPT But this actually never happens. The FO-vnetX Chain never sees any packets and my syslog says: xt_physdev: using --physdev...

...k, to do a ifdown of virtual bridge it seems the only option. > > Many thanks to all for your answers. > * Definitely look to Juerg Haefliger's solution. It's exactly what you want since you requested a method that can be done from the virsh interface. Thanks Juerg! 1) down the vnetX interface from the host node ip link show dev vnetX ip link set down vnetX ip link show dev vnetX And if using bridged networking, you have one more option. 2) remove the vnetX interface from the bridge brctl delif <bridge_int> vnetX Certainly downing the interface using either Juer...

Hi! I'm aware that (host side) vnetX are created when VM boots. But I'm trying to figure out a way ti create a persistence in vnetX names. What I mean is, say, I want to associate VMs vm0 to vnet0, vm1 to vnet1, vm2 to vnet2 and so forth, no matter which order the VMs are booted. I looked around network XML format, but did't f...

Hi all, I have a two-node HA RHEL 6 setup hosting VMs. These use static/standard bridges and all has worked wonderfully. Now though, I need to adjust the qlen value of the vnetX devices for a given guest VM, which I can do with: ip link set dev vnet0 qlen 6000 The problem with this approach is two-fold though; 1. I need to determine which vnetX is connected to a VM. 2. If the VM live-migrates, the qlen of the vnetX on the new host needs to be updated. This causes a...

On Tue, Feb 17, 2015 at 1:43 PM, Sven Kieske <s.kieske at mittwald.de> wrote: > > > On 17/02/15 09:18, C. L. Martinez wrote: >> Hi all, >> >> How can I stop/disable a nic in a virtual guest using a virsh >> command?? I am searching the same effect like if I unplug network >> cable ... Is it possible?? I have tried with "detach-interface"

...d misleading. Thank you for pointing this out. I just did that. And after a reboot everything is still working as expected (yes. I just DID interrupt the services running in my VMs. So i guess i could even upgrade to a newer libvirt =) ) > > > > -A libvirt-out -m physdev --physdev-out vnetX -g FO-vnetX > > > > which should trigger the following rules: > > > > -A FO-vnetX -p all -m state --state ESTABLISHED -j ACCEPT > > -A FO-vnetX -p tcp --dport 22 -m state --state NEW -j ACCEPT > > > > But this actually never happens. The FO-vnetX Chain nev...

Hi I'm trying to monitor bandwidth usage of a KVM VM but couldn't find <target dev='vnet0'/> on virsh edit domain_name all i get is this <interface type='network'> <mac address='52:54:00:a1:05:b6'/> <source network='vmango'/> <model type='virtio'/> <address type='pci'

...gt; > <filterref filter='server-x'> > <parameter name='IP' value='1.2.3.70'/> > </filterref> > > additional iptable-rules are getting created. The problematic rule seems to be the following: > > -A libvirt-out -m physdev --physdev-out vnetX -g FO-vnetX > > which should trigger the following rules: > > -A FO-vnetX -p all -m state --state ESTABLISHED -j ACCEPT > -A FO-vnetX -p tcp --dport 22 -m state --state NEW -j ACCEPT > > But this actually never happens. The FO-vnetX Chain never sees any packets and my syslog sa...

...ridge it seems the only option. >> >> Many thanks to all for your answers. > > > * Definitely look to Juerg Haefliger's solution. It's exactly what you want since you requested a method that can be done from the virsh interface. Thanks Juerg! > > 1) down the vnetX interface from the host node > ip link show dev vnetX > ip link set down vnetX > ip link show dev vnetX > > And if using bridged networking, you have one more option. > 2) remove the vnetX interface from the bridge > brctl delif <bridge_int> vnetX > > Cert...

Hello I have a virtual server with 3 existing VMs running on it without issue. The host has 4 NICs installed; em1 for the host, em2 and em3 already in use by other VMs. I would like to dedicate em4 to my new VM however when I create the bridge like I did for the others I do not get a vnet3 device show up in the list as shown below. I tried using the GUI and virsh to create the bridge. I ended

...::ff'/> </dhcp> </ip> </network> # brctl show bridge name bridge id STP enabled interfaces virbr0 8000.5254000be935 yes virbr0-nic vnet0 vnet1 virbr3 8000.525400cbc550 yes virbr3-nic vnet2 My queries are: (i) For each interface that I attach to my guests, will a new vnetX (X=0,1,2,3,...) be created? (ii) Can two different active networks share the same bridge? Example, can the xml of two active networks have the same line <bridge name='virbr0' stp='on' delay='0'/> ? (iii) If the answer for (ii) is false, how can I obtain the interface n...

Hi all, How can I see what vnet is attached to a certain kvm guest?? For example: I have a kvmguest1. When I launch this guest with virsh command, virsh creates a new vnetX interface for this guest. How can I extract this virtual net interface (vnet0, vnet1, vnet2 or so on) using a script?? Thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

...t; </network> > > # brctl show > bridge namebridge idSTP enabledinterfaces > virbr08000.5254000be935yesvirbr0-nic > vnet0 > vnet1 > virbr38000.525400cbc550yesvirbr3-nic > vnet2 > > My queries are: > (i) For each interface that I attach to my guests, will a new vnetX > (X=0,1,2,3,...) be created? Yes. Each guest interface (except those of type='hostdev', which are just host hardware devices passed through to the guest) has a corresponding unique vnetX tap device or macvtapX device. The socket end of this tap/macvtap device is connected to the qemu p...

Can i assign static vnet* device for some guests?

...devices would be statically > allocated, it would be impossible to guarantee certain vnet name. > > However, what you can do is to create the device yourself and then just > tell libvirt to use it: > > <interface type='bridge'> > <source bridge='vnetX'/> > </interface> > > But most likely, the problem you are trying to solve looks for a > different solution. If you need the device name in order to set up some > environment (e.g. apply some FW rules on the device), we have network > hooks and domain hooks - us...

...> Make sure you have: > > /proc/sys/net/bridge/bridge-nf-call-iptables = 1 That doesn't make sense. bridge-nf-call-iptables controls whether or not traffic going across a Linux host bridge device will be sent through iptables, but the rules created by nwfilter are applied to the "vnetX" tap devices that connect the guest to the bridge, not to the bridge itself. > > On 5/26/2014 1:35 PM, Matt LaPlante wrote: >> I'm trying to accomplish what I had hoped would be a fairly simple >> filtering of traffic to my VMs, but I'm hitting a snag. The VMs are &...

hi, I stop libvirsh and I see it removes vnetx interfaces, but those(at least) of bridge type remain in the system after daemon is stopped. Is this intended would you know? thanks, L.

...k-native-1221' is to allow 1221 as untagged/native but rest all VLAN as tagged. The following portgroup definition works, but I don't want to enumerate all the tagged VLANs in the portgroup definition. I understand what libvirt does on the underlying OVS bridge, once a guest interface (say vNetX) is attached to the portgroup is to set the vnetX with tag=1221 and vlan_mode= native-untagged and it sets trunk = [1222,1221,1223,1224]. Now if I go and clear the trunk setting on the OVS bridge for that interface I am able to see both tagged and untagged (1221) packets on the guest. This is exac...

...ost? If not, then you may have something setup incorrectly with the bridge. Send "ifconfig br0; ifconfig eth0; brctl show" (replacing "br0" with whatever bridge device you have, and "eth0" with the host physical ethernet that is attached to the bridge). The guest's vnetX (tap device) and the "eth0" should be attached to br0 (the bridge device), and br0 should have an IP address, but eth0 should *not* have an IP address. Is this host plugged into a switch port that is locked down to a particular MAC address? You may need to get the guest's MAC address...

Hi folks, I posted this question to the KVM list, but I thought I'd try here too--sorry if this is the wrong place to post this, can you please direct me to the correct forum or list if so, thanks! I'm working on a network security project, using KVM installed on CentOS 6.7 through yum. I have a VM with the goal of using this as a network appliance, and two other VMs, one simulating an