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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ARP response is not present on the other port of linux bridge based on ubuntu 13.10

I recently build linux based bridge for packet monitoring purpose, but there is BIG problem. the environment is, overall env. target of monitoring is VMs on vSphere. two vSwitches are configured on ...
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Assign public and private IP addresses for a KVM guest

I would like to create a KVM guest with two different IPs, like one public IP and another private IP for the same KVM guest. My host is 210.x.x.x. Series and Guest are also configured with the 220.x....
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Can't get network bridging to work

I'm trying to make network bridging to work on a Debian squeeze (I'm experimenting in order to make a QEMU/KVM virtual machine that will be visible to the outside network as if it were a distinct ...
Antonis Christofides's user avatar
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bridging real and virtual wireless network interfaces

I have 2 wireless interfaces, one real (eth1) and one virtual (vt0), running on top of the same physical wireless adapter. Both have separate IP address spaces. eth1 is connected to a laptop, and vt0 ...
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IGMP V3 support in Linux-2.6.35

I am trying to start a bridge connection and force it to use IGMPV3. The following command will explain my issue better : The below is the output of force_igmp_version before issuing brctl commands ...
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Configure Cisco 877 as bridge between Internet and Cisco ASA 5505

ISP ADSL ---- Cisco 877 Router ---- Cisco ASA 5505 I have the above connection. I'd like to avoid using NAT on the Cisco 837 router, and just put the ASA directly on the Internet. However, I have ...
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KVM work with bridge network problems

I try to configure bridge network for KVM(refer to http://www.linux-kvm.org/page/Networking), and it worked for Guest OS, but I have two problems with my Fedora host OS: 1、I can not access internet ...
isware's user avatar
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KVM network bridge with public static IP for both host and guests

I have a Ubuntu 10.04 server with 2 public static addresses. There is a KVM guest (also Ubuntu) installed and running. What i want is to give the guest an IP of the host, so that both machines have ...
Lamnk's user avatar
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openwrt uses a single interface bridge?

My understanding of bridging is that it ties together two interfaces at layer 2. I am looking at a Ubiquiti Nanostation2 running OpenWRT that has an ethernet port 'eth0' and a wifi port 'ath0'. The ...
timbo's user avatar
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macos qemu tap can't ping bridge ip address?

I want to install qemu on macos and use a tap device in the vm. Below is my step. install qemu brew install qemu install tuntap, after installation, I can see tap devices in /dev/tapX brew install ...
Gary Allen's user avatar
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Run docker in an existing network namespace?

Would it be possible to run a docker container inside an existing namespace ? I created a namespace using: ip netns add client Now I want to run a container (with a bridge or host network, whatever is ...
SandiJ's user avatar
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Communicating over bridged interfaces

I would like to communicate to a special IP address on a tiny linux device that has two Ethernet interfaces which are used on a bridge. The bridge is set up like so: # Delete bridge if it exists ip ...
Gabe's user avatar
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bridge0: received packet on bond0 with own address as source address

I have created a bond using netplan (ubuntu 18.04) which shows the same MAC address for the two member physical NICs and the bond itself. I configured a bridge on top of that, for use with KVM/Qemu ...
spoovy's user avatar
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OpenVPN cannot reach other clients, arp replies go to client instead of server

I have OpenVPN configured on three VirtualBox VMs running Ubuntu 16.04. The network configuration is as follows: network config picture. Server config: local 192.168.2.2 port 1194 proto udp dev ...
jaine's user avatar
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/etc/network/interfaces file almost empty

I have a Ubuntu 14.04.1 Server system where the interface em1 is bounded to a bridge: ifconfig em1 em1 Link encap:Ethernet direcciónHW c4:34:6b:ae:ea:a8 ACTIVO DIFUSIÓN FUNCIONANDO ...
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how to associate a Docker network interface to a Linux network interface (eth5) on Linux host?

My Linux host has 8 Ethernet interfaces, eth0 - eth7. I'm running three Docker 1.9 containers on this Linux host. How can I associate a network interface inside one Docker container to a specific ...
Adi's user avatar
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Ping (DUP) with Linux bridges and tap devices

https://i.stack.imgur.com/8XLwU.jpg I have two Linux (Ubuntu 12.04) VM (running on KVM) that networked together using two Linux bridges as shown above. The network interfaces are Linux TAP devices. ...
vishpat's user avatar
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LXC container can only access host via bridge

I have an LXC container with i686 Ubuntu 12.04 running on a x86_64 Ubuntu 12.04 host. I've set up a bridge using instructions here. However the ping from the container only goes through to the host ...
vitaut's user avatar
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KVM is NOT seeing multiple bridges (only macvtap devices)

I am in the process of doing some thesis research about using ebtables and iptables on a KVM host to perform on-the-fly firewall restrictions to KVM guest VM's. Here is the problem: I have a bridge ...
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How to bridge TAP device to overlay network?

I would like to allow OpenVPN users to reach all Docker containers that are part of Overlay network as if they were in the same LAN. The simplest example is 3 containers distributed on 2 hosts, and ...
Mohammed Noureldin's user avatar
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Add persistent bridge and tap in ubuntu 20.04 server

I'm trying to create a bridge whose interface is a tap, both with static IPs, and have them persist across reboots. In Ubuntu 14.04.6 LTS, this could be accomplished by editing /etc/network/interfaces ...
Leshawn Rice's user avatar
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478 views

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 ...
Athul P's user avatar
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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 ...
ptselios's user avatar
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Matrix Synapse matrix-appservice-irc messages only travel from IRC to Matrix

My irc bridge has connected the rooms i wanted, except messages are only passed from irc to matrix! Also the matrix[m] users are not appearing in the irc chatroom. Here are my configs: $ cat config....
PC-Admin's user avatar
3 votes
0 answers
542 views

bridge interface causes boot to hang for many minutes

I have a bridge br0 which is being used as docker's bridge interface and bridges to our vpn with an ipv6 interface. When I set up this bridge manually, everything works fine and I can connect to the ...
GTF's user avatar
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Ubuntu 12.04 - Issue with routing between ethernet and bond/bridge

I have a device which has 3 Ethernet devices and one WiFi-device on board. I'm using eth0 for an internal network (192.168.1.0/24) and eth1, eth2 and wlan0 to connect to an external network (192.168.0....
Spike101's user avatar
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0 answers
560 views

LXC bridge with several IP addresses

While trying to setup a small server with LXC containers, I encountered a problem: I want to assign 4 different IP addresses: 1 address for the host and 3 addresses in a different net for the ...
user2092982's user avatar
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Windows network bridge: STP parameters [closed]

I recently discovered Windows 7 does support STP upon it's own Ethernet bridges. https://reggle.wordpress.com/2011/09/03/hidden-feature-in-windows-7-spanning-tree/ Although the feature is barely ...
Hhut's user avatar
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Add a second bridge to a virtual machine [closed]

We have a ubuntu-12.04 host running another ubuntu-12.04 virtual machine with kvm virtualization and bridged network interface on eth4. This network allows the virtual machine access to the outside ...
krishna's user avatar
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Disable IP on bridge

OK, I'm running libvirt on my server, I have only one interface. In order to use the public IP in my VM I need to set up a bridge, everything OK so far.. But I don't want to setup an IP address on the ...
user158720's user avatar
2 votes
3 answers
6k views

Adding ip address to a bridge interface

Is there really any meaning attached for assigning a IP address to a bridge interface. Note : the bridge is created using brctl and then an IP address is assigned to br0 created. Is there any ...
kumar's user avatar
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KVM bridge trouble in Ubuntu (server 9.04)

I make virtual environment with Ubuntu+KVM. It is the following constitution, but it is lent IP (192.168.1.2) ubuntu02 by DHCPD, and the same IP seems to be lent to ubuntu03 router/dhcpd - ...
freddiefujiwra's user avatar
2 votes
2 answers
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Access another network through a computer that is connected to two networks

I have a 3 windows 7 machines that each have more than one Ethernet port. One of them is one Network A and Network B and the other 2 are only on Network B. Diagram: Network A ...
Evan's user avatar
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2 votes
2 answers
13k views

Bridge interface for KVM VMs with access to Internet?

I create a bridge interface for my KVM virtual machines: ip link add name br0 type bridge ip addr add 172.20.0.1/24 dev br0 ip link set dev br0 up I create KVM VMs: virt-install --name $VM_NAME1 --...
sina's user avatar
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2 answers
14k views

How to setup IP alias on bridged interface in Ubuntu

How do I setup an IP alias on a bridge (br0) device on Ubuntu ? If I wait for br0 to come up and then do /sbin/ifconfig br0:0 192.168.10.1 netmask 255.255.255.0 then it works fine. If however I ...
Anonymouslemming's user avatar
2 votes
2 answers
6k views

When I restart my LXC environment, the container does not re-bind to the IP address

The IP does no longer respond to a remote ping With restart I mean: lxc-stop -n vm3 lxc-start -n vm3 -f /etc/lxc/vm3.conf -d -- /etc/network/interfaces auto lo iface lo inet loopback up route ...
RoboTamer's user avatar
  • 502
2 votes
3 answers
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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 ...
Ingo's user avatar
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2 votes
1 answer
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Questions about bridging VLANs

If, across the same building, I have two physically separate networks to connect devices together via simple switches, my understanding is that I could save myself some hardware-complexity if I were ...
Markus A.'s user avatar
  • 419
2 votes
2 answers
797 views

Proper way to expose VirtualBox' machine to network via "one MAC" security locked switch port

Say, we need to expose LXC container (LXC) or Virtualbox VM (VBM) to public network with its own IP-adress (within additionaly assigned network — ADD-net) which is to be routed through main host. When ...
cadmi's user avatar
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2 votes
1 answer
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DHCP not working through long bridged network

I have setup a hotspot at my local harbor. I have encountered a problem with my setup. The accespoint that creates the hotspot connection is a out door long range antenna from UBNT. The distance from ...
hogni89's user avatar
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1 answer
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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 ...
David Le Borgne's user avatar
2 votes
1 answer
1k views

Bridging two (a physical ethernet with a virtual ethernet) different subnets on linux?

I am thinking if it's possible to create a bridge while allowing each bridged network to exist in it's own subnet. Network 1 - Say, I have a physical ethernet based network eth01 - with subnet 192....
samshers's user avatar
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2 votes
2 answers
3k views

Meaning of tcpdump P direction

The situation is a VM running under kvm/libvirt/qemu (10.202.7.128) pinging another hardware-based system (10.202.7.4) via the hypervisor's bridge. Everything works OK but 'tcpdump -neli any icmp and ...
Senior Geek's user avatar
2 votes
1 answer
2k views

Why is a physical interface not part of the docker_gwbridge?

When I look at the docker_gwbridge, I see that all containers on that host are members of the bridge. bridge name bridge id STP enabled interfaces docker_gwbridge 8000....
sbrattla's user avatar
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2 votes
1 answer
1k views

How can I bridge a VM to a remote network?

I have a system running QEMU/KVM (via libvirt). One of its VMs needs to have a presence on a subnet that is not local to the VM host. I have a Linux system on the remote subnet. Is there a way to ...
asciiphil's user avatar
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2 votes
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lxc vm access outside the host

On Debian 64bit, I configured a lxc like this : host ip : 172.16.0.25 vm guest on this host : 172.16.0.44 I've done the bridge on my host auto eth0 iface eth0 inet manual up ...
Stef's user avatar
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2 votes
1 answer
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Bridged virtual interface is not available or visible to ifconfig

I'm running Ubuntu 9.04, kernel 2.6.28-18, and vmware-server 2.0.1. I'm attempting to setup a virtual linux machine to use a bridged interface rather than NAT or host-only. Both NAT and host-only ...
Omniwombat's user avatar
2 votes
1 answer
3k views

Wireguard as VM bridge without hypervisor visible on VPN

I'm trying to connect two hypervisors together across the internet. Both hypervisors are running KVM for virtualization and I manually created bridges for the VM networking, which currently works. I ...
Alex's user avatar
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2 votes
2 answers
3k views

I can ping Web, but not browse it -- why are my DNS settings failing?

Update 6 @ 2:56p on Nov 21 I am working on a creating a small network of virtual machines and containers. So far, I am stuck configuring the host though. There is no virtual machine involved in this ...
gbambo's user avatar
  • 21
2 votes
2 answers
6k views

KVM bridge for promisc interface IDS

I have a KVM virtualization server which serves up a br0 bridge, mapped to eth0. I want to add eth2 as a bridge to br2 for a IDS virtual machine I'm testing, but the guest OS doesn't see either br2 or ...
batflaps's user avatar
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