Questions tagged [bridge]
Bridging is a forwarding technique used in packet-switched computer networks. Unlike routing, bridging makes no assumptions about where in a network a particular address is located.
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Ubuntu server 2020.4 network bridge for KVM not starting
I'm attempting to configure a bridge to be used for a KVM host on Ubuntu 2020.4 LTS. The basic configuration with netplan works, but the bridge does not work until I manually add the ethernet ...
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Host has no internet access when VMs are running
How do I set up the network, so that both host and VMs can connect to the internet?
I've set up a server to host several virtual machines using KVM. It is intended to serve a library of downloadable ...
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my bridging configuration on freebsd 13 ins't properly configured because any bhyve VM based on Ubuntu 21.04 and Windows 10 can't connect to internet
I've configured the bridging and the tap interface on freebsd 13 because I want to boot and use a bhyve VM based on Ubuntu 21.04 and Windows 10,but unfortunately,after several readings and help ...
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netplan + libvirt - Should I set up virbr0 virtual bridge?
As far as I understand, the interfaces virbr0 and virbr0-nic are created and managed by libvirt.
● 4: virbr0
Link File: /lib/systemd/network/99-default.link
Network File: n/a
...
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How to manually setup Whonix networks for QEMU?
I would like to run Whonix directly using QEMU instead of using libvirt and I want to manually setup internal and external network. Using libvirt I would need to run those commands:
virsh net-define ...
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How to bridge two interfaces while not connecting to it, and use a third interface for network
I am on Linux - Ubuntu 20.04, I am trying to use a 4G USB key that is shown in the interfaces as "ppp0" (created using wvdial) to bridge the secured 4G connection to a sensitive network ...
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Bridge not forwarding the neighbor advertisement
I have a bridge created using libvirt and two VMs. I can ping both VMs using ipv4. However, when pinging using ipv6 addresses, it does not work. I can see the neighbor solicitation leaving VM1 and ...
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Huawei HG8245Q2 connected with other router in bridge mode and WiFi with internet access
I have Huawei HG8245Q2 router with GPON WAN and 4 ethernet ports and powerful WiFi module.
Behind this router I have second (Mikrotik) router and a L2TP server on it.
Unfortunately - Huawei router in &...
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KVM guest in local network using bridge - I can see VM
I create bridge br0 (10.10.10.2) which use phisical eno2 and vnet0 for VM (10.10.10.121).
On Host everything is OK i see VM, VM see Host and Internet. BUT ... I can't See VM from other computers in ...
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Networking start failed on OVH Proxmox 6.4 if a bridge has no interface
We are setting up a new Proxmox 6.4 (based on Debian 10.9) host on OVH (Advance-2) hardware, using the OVH provided template.
In order to create a "virtual" bridge for VMs and LXCs, we added ...
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Docker: How to give container access to network bridge on host? VPN-over-VPN
I'm trying to dockerize a vpn-over-vpn setup that I've been using to bridge two lan segments over another VPN connection, but I'm running into a roadblock that seems like there should be a solution ...
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Use network bridge as default network in libvirt
I created a network bridge virtbr0 with my NIC enp1s0f1. The bridge gets an ip address from the router via dhcp. i would like to use the bridge as default network in libvirt to also get ip addresses ...
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linux ipv6 bridge address does not work when mac address is forced
While playing with linux bridging and ipv6 on ubuntu focal, I met an issue that I would like to understand.
When I manually set the bridge mac address, bridge ipv6 address is not working anymore, why ?...
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veth does not respond to other veth ping requests on same bridge
I created two veth pairs and connected them to the same bridge. However, they do not respond to ping requests. This is ubuntu 20.04.
# create the interfaces and bridge
sudo ip link add br0 type ...
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Debian KVM bridge promiscuous mode still has IP
I had three interfaces working on my Debian KVM box, all three bridged to guest VM's, f0 was mgmt, f1 was public static, and f2 was working promisc bridge. When I reinstalled the OS on larger drive ...
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DHCP not working for bridged QEMU virtual machine
Environment:
A router with DHCP server. This router manages a subnet of 172.16.0.1/16
A host with Ubuntu 20.04 installed, and it has a NIC named eno0.
A QEMU virtual machine running on host.
Purpose:...
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Can't quite figure Linux VLANs out
I've spent the better part of 3 days trying to get this simple example working, I can't really find any cohesive information relating to my problem, I guess people don't turn Linux hosts into Switches ...
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How to create Bridged connection for Qemu/KVM with Wifi?
I want to create a bridged connection in qemu/kvm.
What I want to do is connect the wifi to a bridge (as a slave), then use this bridge to provide network access to the VM.
Using nmtui, I deleted my ...
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Name resolution for dummy interfaces
I've a virtual NIC of type NAT on my Ubuntu 20.04 virtual machine which connects it to the internet via host. For some processing, I need to route all incoming and outgoing packets via a program I've ...
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How to bridge an internal network interface to an OpenVPN tun/tap device
I'm using a two-VM setup wherein the first VM, machine A, has a closed, private LAN shared with the second VM, machine B, which has a second network interface that is configured to hit the internet.
...
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redirecting udp traffic from one network interface to another on the same host
My host has two network interfaces:
eth0:172.16.125.5
eth1:172.165.8.55
I want to redirect all UDP traffic to eth1 port 1234 to eth0 port 1234, ie:
172.165.8.55:1234 -> 172.16.125.5:1234
After ...
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Routing traffic from a bridge interface (with IP assigned) to another network on a different local interface
I'm on Ubuntu 20.04 and am running virtual machines (KVM) locally that are attached to a bridge interface on the host. The bridge (and all VMs attached to it) are getting their IPs via DHCP from a DSL/...
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Debian: On same NIC, bridge plus distinct IP address, with different MACs
Debian host. I have a single NIC that's supposed to sit on two networks; on 172.16.0.0/24 and 10.0.80.0/24.
On the 172.16.0.0/24 network, there should be a bridge, so that local KVM hosts can attach ...
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Openstack instances cannot access Internet [linuxbridge]
I am having serious issues in the deployment of the Openstack scenario related to the Linux Bridge.
This is the scenario:
Controller machine:
Management Interface enp2s0: 138.100.10.25.
Compute ...
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Why set primary interface to `manual` (off) when adding a bridge network?
I am playing around with KVM and bridge network on a Debian 10 Host
Many tutorials tell to set the /etc/network/interfaces to something like this:
# The primary network interface
auto eth0
iface eth0 ...
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Attach a host network interface to a VM and ping other hosts
I have an Ubuntu 18.04 host with a pr0 interface, that is connected, via a hardware bridge, to other hosts in the network.
I have created a virtual machine (at my host), using KVM (virsh) and I want ...
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VLAN support with libvirt for linux bridge to virtual machines
I'm using systemd-networkd to configure network interfaces managed by libvirt for KVM (Kernel-based Virtual Machine) with Debian Bullseye on all nodes. I want to have transparent VLAN support on the ...
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Linux bridge does not forward packets to TAP interface
I have the following scenario where I run a Docker container which has configured inside of it a Linux bridge br0 and attached to it I have the main interface eth0 of the container and a TAP interface ...
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Cannot communicate from host to container and vice versa
I have a GitLab instance running in docker. But I am unable to ping or curl the port 8000.
CONTAINER ID IMAGE COMMAND CREATED STATUS ...
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Routing with nftables (Fedora33, nmcli, brctl)
A/ Host (Fedora 33) with Ethernet if eth0. ip 192.168.18.11(/24)
and
B1/ Kvm guest with if vnet0 enslaved to virbr101. ip 192.168.101.88(/24) (manual routing, static IP)
or
B2/ Kvm guest with if vnet1 ...
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Using Debian as host for Virtualbox - problems with network
I have been banging my head on this for awhile. Im somewhat new to using Debian as a host/router for virtual machines and Im strugeling to get remote access to my VMs.
My setup is like this:
Server ...
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Debian 10: activating bridge interface on remote host freezes ssh connection
I am working on a fresh installed Debian Buster installation on a remote host located in a data center elsewhere.
I have a script ready to copy the working standard /etc/network/interfaces back in ...
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Bridge created vm not receiving packets + firewalld
I’ve create a bridge into cockpit on the main interface of this fedora server host.
I want to be able to access VM like any other host and I wanted to proceed step by step and not create a forwarding ...
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Attach a VM to a host TAP or TUN device
I'm working on a project whilst in lockdown in England, and I am hoping someone can offer some advice?
I have a machine with 5 physical eth interfaces on Linux Mint, 20.04. All eth interfaces ...
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Proper way to configuring docker network bridge on the host side
Edit: Note that I'm referring to a single host setup, some local server architecture and not some enterprise-grade backend :D
docker network create with the bridge driver creates an actual bridge ...
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Xen Domain0 Has Network But DomainU does not
After re-installing my domain 0, a guest VM (domain U) is no longer able to connect to the network.
I am using Ubuntu 20.4 on my Domain 0 with Xen 4.11. I am able to successfully connect to internet ...
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How to configure the AT&T (Arris) BGW-210 router for IP Passthrough using static IP(s) and pointing to UniFi Dream Machine Pro?
We are setting up AT&T fiber internet with 5 usable static IPs and the Ubiquity UniFi Dream Machine Pro (UDM-Pro). I would like to configure the BGW-210 to act as a bridge to the UDM-Pro.
I found ...
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Set up KVM host with multiple VLANs, each attached to "its own" external IP address
I'm trying (and having a hard time) to setup a clean KVM environment with: an Ubuntu (20.04) host (with a single NIC), multiple ubuntu KVM guests, 2 public IPs, and one Vlan per IP.
Basically ...
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Multicast not working on macvtap device
I have a problem with my virtual network and IPv6 network discovery (multicast traffic).
(The setup might seem a little bit involved and I don't remember the exact reasons for every design decision. ...
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Are network bridges still in use today?
I've been wondering if bridge is still used by today , because i rarely seen it .Are there any networks thing such as bridge that replace bridge for today? If bridge still used by today what kind of ...
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NetworkManager bridge is not working
I face the same problem on 2 difference machines: A CentOS 8.1 and an openSUSE Leap 15.2
I want to create a bridge on each host that will be used from libvirtfor bridged networking.
On both servers, I ...
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Docker macvlan need to publish ports?
I'm doing a macvlan bridge... now the question comes spontaneously ...
Being that with macvlan, the container is exposed directly to the network, does it need to expose the ports with the -p option at ...
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Adding a VLAN (over bond/lacp) interface to bridge makes physical interfaces to go down
I have a working configuration of a team interface bonding two physical interfaces, with several VLANs.
ens1f1 ----- |--- team0.1826 (172.18.x.y/28)
|--- team0 -----|--- team0....
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Bridge interface with VLAN tagging
I need my Proxmox instance to accept traffic from another VLAN and I'm having trouble with setting the interface correctly. I have 1 NIC, I've configured a port on my switch as a trunk interface, now ...
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Should a bridge device and network interface card share the same IP address?
If I create a bridge device and then set it as the master of my NIC then it appears that both devices have the same IP and two mac addresses. Is this correct?
2: eth0: <BROADCAST,MULTICAST,UP,...
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Bridged OpenVPN Tunnel not working properly
I'm stuck with a problem:
I set up an P2P OpenVPN connection between two sites. I added the VPN TAP Interfaces into a bridge on either side.
Client side:
# brctl show
bridge name bridge id STP ...
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How to connect host only to network bridge with QEMU VMs on linux host
I have a bridge working for qemu. I am able to start multiple copies of the same machine and they can network together. I am not interested in connecting to the outside internet. This is all on ubuntu ...
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MAC address timeing out of the Linux bridge
We stumbled upon a weird behaviour (well, everything works according to specifications but it should be somehow tunable and/or I would like to know how to properly set it up) in linux bridge or ...
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VLAN 'Bridging' for Core on Multiple Networks
I think I have a very unique use-case that I need help with since I am not a network engineer. Here's the layout. I help operate a gaming floor network for a Casino. The thing that I noticed right ...
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Difference between VMWare Bridged network and Docker ipvlan/macvlan?
In Virtual Networking, I have seen two techniques to connect the guest machine with the Host machines network.
In VMWare/VirtualBox - Bridged Networking is used to connect the guest machine with the ...