Questions tagged [openvswitch]
The openvswitch tag has no usage guidance.
106
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38
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How to drop arp requests trying to resolve a particular IP address at a logical switch port?
I am using l2gateway port to attach a physical L2 segment to a logical network. But both the logical network and the physical segment has one common IP, say 10.0.0.1. I want to prevent the traffic ...
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21
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When installing neutron ovn from openstack-ansible, ovs will be installed automatically if install_method is set to distro
We are trying to install openstack through openstack-ansible and configure neutron with ovn.
The installation version was yoga/zed, and ovn was configured by referring to the link below.
yoga : https:/...
- 1
0
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1
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26
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Isolate traffic between vswitches but allow l2 traffic from external network
I've two OVS bridges which they are connected to the 3rd v-switch using patch(es).
Bridge br1
Port br1
Interface br1
type: internal
Port br1-ext
...
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0
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37
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Connecting 2 Virtualbox VMs to Open vSwitch running on another Virtualbox VM
I have 3 Ubuntu 22.04 VMs created using Virtualbox. My host machine is Windows 10. One of them is running 5G core emulator, and the other one is running UEransim. I was able to connect UE to 5G ...
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36
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Connecting different interfaces with different IP ranges to Open vSwith OVS
I have a setup with 4 VMs. There are two servers: VM1, VM2, one router: VM3, and one client: VM4.
VM3 is connected directly to all other VMs and routes traffic between them.
VM3 has 3 different ...
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0
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0
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54
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Nothing but DHCP works after testing SR-IOV on Mellanox ConnectX-4 Lx
I was following the Proxmox guide for enabling PCIe passthrough and SR-IOV for my NIC, since I am running Vyos in a VM as a router. However, after undoing all the changes the NIC is not working ...
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66
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OVS switch and Tap interface- Connecting two vm using tap interface-ubuntu
I want to connect 2 VM together using tap interface on Ubuntu.
VM2 will connect to VM1 by a tap interface on VM1.
I will use OVS switch to forward traffic from VM1 to VM2.
Scenario:
Router from ISP ...
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0
answers
24
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Ingress traffic shaping with OVS port
I have a ovs topology like this:
h1
|
|
[SW 1]
/ \
/ \
[SW 2] [SW 3]
\ /
\ /
[SW 4]
|
|
h2
Traffic is sent ...
- 1
0
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0
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21
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Traffic shaping for multipath routing in OVS
I'm working with OVS and tried multipath routing using group tables like in this link: https://github.com/PSIB0T/Multipath-Routing. It splits traffic to buckets with output is different ports.
At ...
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1
answer
135
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No layer 2 traffic in an Open vSwitch bridge
I see no traffic in layer 2 and above in an OVS bridge, but I do see layer 1 traffic.
I have the following setup:
I have created a Linux VirtualBox VM with three adapters: NAT with port forwarding the ...
- 123
1
vote
1
answer
97
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OpenDayLight SDN: Can't get openflow table info via OpenDayLight RESTCONF
I'm trying to connect several openflow OVS instances to OpenDayLight SDN.
My switches succesfully attached and I can get the nodes informations via the following RESTCONF request:
/rests/data/...
- 11
0
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0
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65
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Weave net empty flows for OpenvSwitch
I have 2 containers c1/c2 on 2 separate hosts and I am running Weave Net docker plugin with multicast and fastdp enabled.
Both containers can communicate fine on the underlay network both in unicast ...
0
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0
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161
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Open VSwitch - Connect two virtual networks through two physical networks
I managed to setup the following network configuration :
HOST1 and HOST2 are two physical machines running Debian OS.
They have both two network cards (eth0 and eth1), each of them connected to two ...
- 111
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1
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62
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KVM guest low network speed
I have a KVM guest VM running RHEL 8.7 (12vCPU, 24GB RAM) and a hypervisor with 10Gb NICs.
I'm getting weird results when using iperf3 on my guest machine as a client and a TrueNAS server as a server. ...
- 1
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170
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GTP-U configuration in OVS
I'm trying to configure a virtual GTP-U interface in OVS, however when I try the below command (from https://docs.openvswitch.org/en/latest/faq/configuration/):
Q: Does Open vSwitch support GTP-U?
A: ...
- 478
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1
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210
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simple openvswitch forward demo not work
What are the details of your problem?
Hi, that is my first time try ovs. i am using Arch Linux, and installed openvswitch.
use sudo ip link add v1 type dummy && sudo ip addr add 10.0.0.1/24 ...
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0
answers
81
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Tracing a packet across a DNAT boundary and into OpenVSwitch
I am trying to figure out where a connection is getting dropped in a complex SDN environment that involves a combination of nftables rules and an OpenVSwitch switch with complex flow rules.
I have a ...
- 43.7k
2
votes
1
answer
357
views
LXC container network with OVS not forwarding ARP correctly
Using lxc containers, I want to simulate network components individually. For this, I am trying to embed OVS in an lxc container.
Initially, I started with the following setup, which works properly ...
- 121
2
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1
answer
942
views
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 ...
-1
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1
answer
170
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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 ...
- 29
1
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1
answer
397
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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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1
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133
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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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0
answers
92
views
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 ...
-2
votes
1
answer
916
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 ...
- 107
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votes
1
answer
119
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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 ...
- 61
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0
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99
views
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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0
votes
1
answer
121
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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 ...
- 11
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90
views
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 ...
0
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1
answer
591
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 ...
- 1
0
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0
answers
854
views
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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1
vote
0
answers
177
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 ...
- 37
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0
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273
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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
2k
views
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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1
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743
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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 ...
- 238
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1
answer
3k
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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 ...
- 11
1
vote
0
answers
795
views
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 ...
- 163
2
votes
2
answers
4k
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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 ...
- 629
1
vote
1
answer
2k
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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 ...
- 21
2
votes
1
answer
761
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 ~]# ...
- 43.7k
1
vote
1
answer
725
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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 ...
- 125
0
votes
1
answer
1k
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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
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0
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323
views
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. ...
- 629
3
votes
4
answers
642
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
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0
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142
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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
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1
answer
1k
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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 ...
- 187
2
votes
2
answers
3k
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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 ...
- 583
2
votes
1
answer
5k
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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 ...
- 31
1
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1
answer
690
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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.
...
- 21
0
votes
1
answer
678
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 ...
3
votes
0
answers
955
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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