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Questions tagged [openvswitch]

106 questions
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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 connection originating from 111.222.73.199 (not a…
larsks
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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 and routing via invalid ip for preventing ip…
Vahid Alimohamadi
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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 Machines on the subnet that the external router is…
thurlimann
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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 addresses But not visible automatically under…
topmop75
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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 their physical infrastructure. They have two pretty…
Dave
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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 another on the bridge while pinging from external…
aldin
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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 only with OVS and without any physical switches?
AliReza NaSRi
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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 interface exposes services on a specific port…
BuzzTee
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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" Port "vmbr1" Interface "vmbr1" …
user212942
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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 public and private network. Currently, this is a…
ASM
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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 VLANs 4,7,221 and 800. The setup of eno1 is done…
Andreas Schuldei
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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 switch. Various devices are connected to the switch…
benetsi
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Hosts cannot ping in two name spaces using Open Vswitch

I have two name spaces red and blue. Red is connected to host1, and blue is connected to host2, but these two hosts cannot ping each other. Here is the commands that I put: ip link add host1 type veth peer name virt1 ip link add host2 type veth peer…
secret
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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 but they only work with linux bridges. I thought…
igalvez
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Is there a way to emulate a DHCP server (overlay network)

I have created an overlay Level 2 network using VLAN tags with Open vSwitch. I want a Level 3 one so I need to give each VM a consistent IP address. I'd like every host on this VLAN to get an IP address from a DHCP server, so I can plug in and out…
user2358943
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