Questions tagged [openvswitch]

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KVM Networking - assign IP to each VM by outside DHCP

I am new to KVM and am having a problem with setting up the networking. I want each VM to get its IPs assigned by the network's DHCP, not the internal DHCP that the KVM keeps trying to set up. In ...
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-1 votes
1 answer
30 views

Blocking mac spoofing on libvirt guests using openflow

I have a couple of kvm vms running with libvirt and they are using openvswitch bridges. I need a mechanism to prevent mac spoofing on a guest. I tried libvirt filters no-mac-spoofing and clean-traffic ...
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Openstack traffic flow is not showing on patch-tun or patch-int

I´m analyzing OpenStack traffic flow between instances, to understand how the traffic goes from one place to another. I have a provider network with openvswitch configuration. My scenario is depicted ...
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  • 21
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1 answer
130 views

OVN Cluster Health Command

Is there any command-line tool for the OVN Cluster Health check? Or each of its components? and a command or commands which gives stats about the cluster. For example, without a functional test, I ...
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38 views

How to configure openstack-neutron to add floating ips

I have an openstack deployment using kolla ansible. I am unable to configure neutron for floating IPs, Where do I start? I have a router which forwards say, 40 different public IPs onto a single high ...
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ovn-sbctl show returns empty output

I have ovn architecture running on the same node, just to be clear northbound DB and southbound DB, controller everything is running on the same node, now I think the problem can be In my ...
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Can We Use Openstack Neutron as standalone component?

Scenario: We are trying to develop our Virtual Network using Open Virtual Network or OVN, We need our Virtual Network Switches running firstly on the root Virtual Router, and there are some other ...
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1 answer
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How i can assign /32 ip address to openstack nova instance without float ip?

I'm developing a custom panel for my openstack home lab via rest api. I've investigated Hetzner cloud ip (v4) addressing mechanism and i found it is like this: It is assigning /32 valid ip v4 address ...
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Tunnel packets get filtered or stripped off, also certain packets like BGP

I was trying to figure this out for quite some while now. So I am trying my luck here now... I have some VMs that should communicate with non VMs. There are 2 use cases. The first are BareMetal ...
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-2 votes
1 answer
523 views

GRE tunneling using Open vSwitch

I am trying to implement tunneling as described here with the following setup (without any success): ho1 is a host only interface. I want to connect Nested Guest 11 and Nested Guest 21. I have read ...
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1 answer
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Network Discovery wont work over OpenVswitch VXLANs tunnels

I have working Openvswitch VXLANs, Recently i noticed Network Discovery wont work over VXLAN tunnels across different Hypervisors. Virtual machines can use all file sharing etc if accessed through IP ...
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2x Node OpenStack with additional Synology

Dave here I'm building a concept for a customer and they want to build a dev environment for their small business network. This is for pen testing, and as close as they can virtualized version of ...
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kernel BUG at ./include/linux/skbuff.h:4470 leads Server to Hang

Server with linux version 5.5.0-050500-generic and OS version Ubuntu 20.04 LTS I have two interface which are connected to ovs bridge. As per normal flow packets are redirected to one interfcae to ...
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open vswitch and open virtual network in openstack

I have a local lab which does not have a physical switch and consists of 3 servers which are connected to each other Nics. Now I want to implement vlans, want to know is it possible to setup vlans ...
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1 answer
305 views

Open vSwitch and port translation

we've got a very specific requirement which I want to solve with Open vSwitch. It already works somehow - can you show me what I'm missing here? Requirement: a Docker container connected to a mac-vlan ...
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OVS Bridge Inbound broadcast packets dropped when rstp enabled

I have set up the network through OVS. However, communication with other PCs is not working normally. Checking the reason, inbound broadcast packets are dropped. ovs-vsctl show Bridge "vmbr1&...
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131 views

OpenvSwitch PLVAN support

I have looked up the supported feature of OpenvSwitch on the official website. However, I couldn't find any support for PVLAN. I wonder if OVS supports Private VLAN (PVLAN) which is composed of ...
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Multiple private networks across multiple hosts (KVM, OpenVSwitch)

I had asked this question on SuperUser, looks like it wasn't the correct forum. Hopefully ServerFault is the correct one. I am working on a project, running KVM virtualization on 4 different host with ...
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2 answers
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Why does my ethernet interface not get added to my openvswitch bridge on startup, with debian 10.5?

I am setting up a kvm/qemu/libvirt host (debian buster 10.5) with two ethernet interfaces: eno1 for the host traffic and eno2 for the VM traffic. eno2 is connected to a trunk switch port carrying the ...
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4 votes
1 answer
427 views

In virtual networking, how does a Virtual Switch differ from a linux kernel bridge?

I have seen that in virtual networking, guest VMs/containers can be connected with host and internet either by using kernel bridges(linux) or Virtual Switches. Example - Bridges docker uses linux ...
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How to configure VLANs along with Libvirt/KVM/QEMU and OVS?

I am using Debian 9 machine as a router with two interfaces: eth0 for WAN eth1 for LAN The eth1 has subinterfaces for multiple VLANs (eth1.10; eth1.20; eth1.30) and has trunk connection to managed ...
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Why can't we ping the gateway on our Open-vSwitch network configuration on Proxmox 6.1-3?

We are trying to get open vswitch working on 10 hosts running Proxmox 6.1-3. We think we have a configuration that should work, but it doesn't and we can't ping the gateway. These are hosts with 4 ...
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2 votes
2 answers
3k views

What is the proper way to setup Open vSwitch with NetworkManager in CentOS 8?

How it was before in good old times of network-scripts: I've describing bridge and port in files: /etc/sysconfig/network-scripts/ifcfg-br0 /etc/sysconfig/network-scripts/ifcfg-port0 than restart ...
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1 vote
1 answer
2k views

libvirt & openvswitch VLAN tagging on the fly

I'm working on a project using libvirt with qemu and openvswitch on Debian 10. I would like to be able to modify the configuration of a network card of a domain in bash with the update-device command ...
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2 votes
1 answer
483 views

Setting up DHCP with OVN

I'm trying to set up an environment similar to the one described here in which OVN will provide DHCP service to logical networks. I have a logical switch named `net0 with two ports: [root@ovn0 ~]# ...
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1 vote
1 answer
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oVirt - Running VMs into a Subnet

I am trying to run VMs (and Pools) into a NAT. To reach this target I have: created a new Network in the Cluster; checked "Create on external provider" check box; selected ovirt-provider-ovn; entered ...
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0 votes
1 answer
1k views

libvirt: create a bridged network using openvswitch with dhcp enabled

I am trying to use libvirt + dsnmasq + openvswitch to create a bridged network with dhcp enabled. I created a libvirt network with the following XML: <network connections='1'> <name>ovs-...
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1 vote
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How to isolate traffic between VMs within openvswitch?

I've trying to achieve traffic isolation between VMs inside openvswitch with using VLANs. But I've faced with issue that when I've set VLAN tag on VM's port VM can't access external physical network. ...
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3 votes
4 answers
454 views

Lab of virtual computers connected to virtual switch with port forwarding

I have a lab in which I have three computers connected to a switch. two of the switch's ports are mirrored to a third port so that all the communication between the two computers is mirrored to the ...
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1 vote
0 answers
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Overlay Network on Windows Server 2016 for WSFC + SQL Server HA

I'm trying to create an Overlay Network on Windows Server 2016 to create a separate address space for Windows Server Failover Clustering (WSFC). This cluster will eventually be used to host a SQL ...
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3 votes
1 answer
1k views

How to setup a GRE 3 host mesh without loops and forwards with OpenVSwitch?

I'm setting up a quite simple 3 host Proxmox (Debian) HA cluster. All VMs should be in the same subnet and when one fails over to another host inside the VM no reconfiguration should be required and ...
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1 vote
2 answers
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What flow rules to add to the table for L2 Forwarding in open vSwitch?

I am performing an experiment on 2 Xeon based servers. Both the servers have two dual port NIC, total 4 NICs. OVS is running on one server and DPDK pktgen on the other server. I tried to add flow ...
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  • 553
2 votes
1 answer
5k views

How to configure VxLAN tunnel with ovs bridge?

I want to connect VMs located on two different machines with ovs bridge and VxLAN tunnel, suppose the topology as the picture topology shows, my configuration on host A like this(configuration on host ...
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1 vote
1 answer
554 views

Using openvswitch with mpls and tcp

I'm doing R&D in SDN. In this case scenario, we use MPLS labeling, and Open vSwitch as software-switches. We are using 2 server nodes with ovs 2.6.0, with kernel modules loaded, and 2 hosts. ...
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0 votes
1 answer
550 views

Domain names not getting resolved after adding ethernet port to Open vSwitch

For a QoS experiment, I wanted to connect two VMs to Open vSwitch. I created two tap interfaces and attached the VMs to them. I added the two tap interfaces to Open vSwitch. Finally, I added the ...
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3 votes
0 answers
876 views

OpenVSwitch with Libvirt

Here's my situation: I'm running CentOS 7 with Openvswitch and Libvirt/Qemu. My domains are configured to use the virtualport type openvswitch, so when I start a VM it creates a port in the ovs bridge....
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1 vote
1 answer
3k views

Direct Veth Pair vs Linux Bridge

I'm trying different network configurations between LXC containers to learn something and have fun. I've just found out that two containers can communicate with just a veth pair, so I'd like to know ...
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0 votes
2 answers
944 views

OpenNebula (KVM) + OpenvSwitch, high CPU load on high bandwidth use

We are running an OpenNebula 5.0.2 environment on Ubuntu 16.04, using OpenvSwitch 2.5 for bridging the virtual interfaces and LACP trunking the two Gbit ports, which is working perfectly. But when I ...
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1 vote
1 answer
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Running dnsmasq in docker container on Debian - check_dhcp ignores dnsmasq

I'm testing configuration for my dnsmasq DHCP on my Virtualbox Debian machine. On production I want dnsmasq to provide static IP addresses to guest systems running via qemu + libvirt + openvswitch ( ...
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0 votes
0 answers
829 views

Why on network node not create tap* interface when created instance?

OS RHEL 7.2, openstack release - kilo. I have 4 node: controller, network, compute and block storage. I have some problem. When I create instance on Horizon, he get IP, but in network node not create ...
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1 vote
1 answer
2k views

Linux Spanning Tree between Bond and an interface

I try to do something with network virtualisation to get my Proxmox server ready for production in an HA environment i'm using openvswitch 2.5 the Setup that i try to reach: My Server which has 4 ...
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1 answer
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how to direct all the traffic associated with a VM to a separate physical ethernet interface in Xen?

I have 3 VMs running on Xen hypervisor with Ubuntu 14 DomU.I want to configure my network in such a way that traffic to and from Vm1 goes out via eth1, vm2 via eth2 and so on. For this i need to use ...
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1 vote
0 answers
26 views

Bind OVSBridge to an already bound port

I want to enslave a NIC to OVSBridge which is already enslaved to a Bridge. Is that possible, if yes, how ?
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2 votes
0 answers
856 views

Lacp over two linux boxes - something like MC-LAG

I have two linux box'es which are gateways for some kind of virtualized network (Openvswitch, GRE). I am trying to optimize performance - so I decided, that I have to try remove routing part from them ...
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1 vote
0 answers
370 views

Connect Open vSwitch to interface in a VM OpenStack

I have single VM in OpenStack, with a single interface eth0. I want that all the traffic that goes in and out is passed trough a Open vSwitch (where I will have some flow rules). I did the following: ...
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1 vote
1 answer
2k views

how to bring up network-interfaces and bridges in specific order at boot time

Currently, my setup is having many nodes, each having RHEL 7 installed, with each node having only one single interface. I am using ovs-bridge and a vlan-tagged interface within the host. I use vlan-...
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Adding multiple vlan interfaces into bridge (ovs)

I am adding multiple vlan interfaces (eth3.409, eth3.410, ...) to a bridge, furthermore I also add the eth2 interface (local network) to the bridge. eth3 is a trunk with 13 different vlans. The ...
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3 votes
0 answers
958 views

So many retransmission over NSX enabled vDS of vSphere

I'm currently on test of VMware NSX network environment and met some trouble. My Environment is: Management Cluster with 3 Hosts and NSX components on 2 dedicated Hosts Compute Cluster with 2 ...
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  • 264
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2 answers
739 views

Persist OVS mirroring on Xen reboot

I'm running Xen on Debian with five guest VM:s. I've used the following command to setup port mirroring to two of the VM:s ovs-vsctl \ -- --id=@m1 create mirror name=detector \ -- add bridge ...
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network switch features recommended for use with open vswitch

I am looking to setup openvswitch to use with a handful (<10) servers and need a couple of ethernet switches to implement this. Are there any features that are recommended to be present in the ...
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