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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Xen dom0 bridge interface drops a lot of RX packets?

I'm running Gentoo Hardened as Dom0. It also acts as a router/NAT. There's a bridge interface called br0 which contains a pci-e wlan card, ethernet nic & domU. bridge name bridge id ...
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Xen Vif creation xl vs xm

Hi everyone, I switch my server from a xend/xm Xen install to a 4.1 xl Xen install. Therefore Xen does not create vif network interface when I launch xl create /etc/xen/my_server.cfg but does create ...
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Gues mapping to the hypervisors network

I am quite new to KVM, and my hypervisor is a CENTOS 6 machine. It has 4 network ports em1-4. The guest machines are eithe CENTOS 6 or 7. On ports em1-3 I have set up a bond called bond0. I would ...
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Guest networking not working on Debian Jessie Host server KVM with br0 bridged network

GUESTS networking not working at all. In other words guest can not ping host or lan gateway. I have br0 bridge already created, also brctl show that vnet0 was properly added by KVM to br0 on guest ...
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dns server ip address is not written into resolv.conf [migrated]

linux mint 17.3 i have to manually write "nameserver 8.8.8.8" in /etc/resolv.conf on every reboot, it also gets stuck with message "waiting for network" where i press "ESC" button to skip that and ...
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how to make sure modem is truly in bridge mode

I need public ip in pfsense wan interface so I configure my adsl modem as bridge mode But I have little doubt on this "it is truly in bridge mode". What are the steps to make sure about bridge mode ...
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Wan ip always 0.0.0.0 after set bridge mode

I try to set my my modem(unnanti A-300M) as Bridge Mode (set eventhing as a default), After getting wan addr is 0.0.0.0. Easy for your reference note: unnanti A-300M = Modem + Router
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Can ping through wireless bridge but can't route traffic

I'm trying to route packets between a wired-wireless-wired link. I'm using a Spirent test center as a traffic generator which routes traffic to an Access point over a LAN cable(wired link)- This ...
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Can't bridge traffic between a wireless and wired interface of a windows 7 laptop

I'm trying to route packets between a wired-wireless-wired link. I'm using a Spirent test center as a traffic generator which routes traffic to an Access point over a LAN cable(wired link)- This ...
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Bridging host-only subnet on multiple Dom0s

I currently have two XEN-Hosts running a set of virtual machines. These machines can communicate with each other via a host-only network. I want to be able to move virtual machines between both ...
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libvirt IPv6 Guest can't connect outside of the Host

i am trying to get a address from my IPv6-Subnet working in a Virtual Machine(libvirt, qemu). IPv4 over nat works like a charm. The host is a Debian 8.5 with qemu 1.2.9 and a 4.6.3-1~bpo8+1 (2016-07-...
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Blocking STP Traffic

I am using Xen virtualization with a bridged mode netwrk. I noticed that there is a lot of spanning tree (as understand) traffic coming from a network. Such as: STP 802.1d, Config, Flags [none], ...
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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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How can I block all traffic to/from an bridged interface while allowing DHCP?

I have a PC (running Fedora 20) that is being used as a "software switch" to control the network connectivity of some external devices. There are eight such devices; the PC has two 4-port Ethernet ...
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Openstack instance cannot be sshed or pinged, multi node setup

I am using Openstack Mitaka My company has a network: 10.23.77.0/24 So I created a network: External Network: 10.23.77.0/24 My private network : 192.168.123.0/24 My router is between these two ...
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OpenVPN server on Windows 7 - How to route specific IP addresses to clients?

Okay, so I do not have a strong background per se in computing, nor networking, and I'm really just starting to learn this stuff now, for a relatively small family business of ours. It is rather ...
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tap interfaces always disabled in linux bridge

I have a physical interface eth0, and I want to create two virtual interfaces and bridge them with eth0. For this purpose I do: #Create the virtual interfaces tunctl -t tap0 tunctl -t tap1 ifconfig ...
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tcpdump on bridge interface (virbr) does not receive any packets destined for one of its addresses

Here's the configuration for the interface: # ifconfig virbr0 virbr0: flags=4355 mtu 1500 inet 192.168.11.1 netmask 255.255.255.255 broadcast 255.255.255.255 ether 52:54:00:99:e3:...
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Possible for linux bridge to intercept traffic?

I have a linux machine setup as a bridge between a client and a server; brctl addbr0 brctl addif br0 eth1 brctl addif br0 eth2 ifconfig eth1 0.0.0.0 ifconfig eth2 0.0.0.0 ip link set br0 up I also ...
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Iptables not working on a bridged setup [closed]

I am trying to block DNS requests using an Ubuntu machine. I have created a bridge and the packets are being forwarded as expected. Only when I add iptables rules, it is not taken in account. I tried ...
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KVM - Adding public IP over bridge

I am working on setting up a KVM environment and normally I just take it for granted that the networking has been set up. I am running into difficulty getting the public IPs accessible from the VMs. ...
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docker0 bridge status toggles between enabled/disabled, what could be causing that?

I have some CoreOS bare metal instances that are displaying unusual behaviour on the docker0 bridge device. On one of the instances where this has been occurring, I'm running couchbase server and it ...
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Docker containers don't have internet access until docker service restarts

I'm creating a bridge manually, with this command: docker network create --driver bridge --internal --subnet=172.20.0.0/24 br0 Then i start containers using that bridge parameter --net=br0 --ip=172....
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libvirt bridge is not forwarding arp replys

I did set up an vm with libvirt but it gets only sometimes network connectivity. I could narrow the problem down to the bridge is not forwarding the arp replys from the vm. From within the VM I can ...
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Connecting two OpenVZ internal networks so containers can see each other

I have two OpenVZ Hosts with containers on them. This is the current layout: Host-A: (eth0 (connected to internet), eth1 (connected to Host-B)) Host-B: (eth0 (connected to internet), eth1 (connected ...
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Routing from docker containers using a different physical network interface and default gateway

Background Information I have a server with two network interfaces that is running Docker. Docker, like some virtualization tools, creates a Linux bridge interface called docker0. This interface is ...
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Linux Bridge (vmbr) has no connection to physical NIC [migrated]

I built myself a new home server and wanted to use Proxmox VE. Its Debian based and I have 3 KVM-machines running. Machine 1: "Sophos UTM" has WAN on vmbr0 and DMZ on vmbr1 (192.168.200.254) Machine 2:...
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FreeBSD bridge ARP replies not forwarded

I have a bridge between two networks using the same address space, and have very strange issues with ARP packets. Interface bridge0 has no IP address assigned, and has two members : em1 and em2. A ...
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72 views

Dual interface PC with one IP address

I would like to set up a machine with 2 network interfaces in the following setup: LAN1 <---> PC <---> LAN2 The tricky part is that the PC should be accessible from both LAN1 and LAN2 with the ...
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3 server point to point bridge loop

I have a setup with 3 servers (A, B and C) running debian jessie which are all directly connected to the other two servers, so it is a ring-like layout. I'd like them to only have ohne IP each like if ...
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Qemu Proxmox VM - Network access to guests for BackupPC backups

Environment I rent a dedicated server from OVH and installed Proxmox 3.3 (which is based on Debian 6 Wheezy) in order to create and manage multiple Virtual Machines on it. Each VM is configured to ...
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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 ...
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bridged LXC: container's mac address learned on wrong interface

Ubuntu host has p2p1.17 physical interface attached to bri17 bridge. LXC container FOO has following net config: lxc.network.type = veth lxc.network.link = bri17 lxc.network.hwaddr = 00:16:3e:aa:aa:...
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linux veth use existing peer interface

I have a sit tunnel interface which I want to transparently connect with one end of a veth pair so that everything that drops out of the tunnel interface flows through the veth interface and vice ...
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Bridge not functioning as expected

I want to put a listening machine in my test network using a bridge setup. I now have the following test setup: PC1 (192.168.40.250/24) --- Bridge (192.168.40.160/24) --- PC2 (192.168.40.132/24) ...
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One way network bridge [closed]

I have two networks, with a single machine sitting on both (two NICs) shown below. That machine is Linux. I was hoping to set up a bridge of some sort so that work stations on the 192.168.1.x ...
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failed to start domain on RHEL 7.1 using KVM

I want to create a domain(guest machine) on my RHEL 7.1 using KVM. The domain is getting defined but when I start it, it shows the following error: virsh # start vm-1 error: Failed to start domain vm-...
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Transparent Bridging of Internal Network in KVM

I am deploying a following topology of virtual Honeynet in KVM.Topology of Honeynet I have two network interfaces eth0 and eth1 ony my System. Problem I am facing is to implement transparent bridge i....
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policy routing to guests on other server

After long searching I've found the answer to my challenge, but the last step fails. I have two identical servers that both serve multiple guests. The servers have two interfaces: one for the ...
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Kvm virtualization packet loss on guest machine

In Ubuntu 14.04(64-bit) by using KVM virtualization and bridging network I have about 10% packet loss in my guest machine and I have no packet loss on host machine. server1@xxxx:~$ uname -a Linux ir1 ...
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How to isolate two containers connected to the same bridge?

I have several LXD containers which are bound to a single bridge (the default lxdbr0 or another one, it does not matter). The host itself has another two interfaces, one ultimately connecting it to ...
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205 views

pfsense bridge of vlan interfaces

Hardware Setup AMD E1-2100 Mini-ITX Motherboard with Onboard Gigabit (re0) Intel PCI Express (x4) 4-port Gigabit Adapter (igb[0123]) Software Setup pfSense v2.3 I'm trying to replicate my ...
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28 views

Bridge networks via Wi-FI

I've bridged networks before using wired bridges but just want to check that this is also possible via Wi-Fi. In the attached diagram on the left there is the pretty common laptop connected via Wi-Fi ...
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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 ...
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Bridging of Internal Network in KVM

I am working on a project regarding deployment of VMs as internal network, which should be accessible from external LAN, in KVM. I am stuck in bridging these virtual machines. My setup consists of ...
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How do I assign a Public IP to a Container in PROXMOX

I initially created vmbr1 and did not assign it an IP. Used it as a bridge for container that had the public IP assigned to it. It did not work. I don't understand what else needs to be done. auto ...
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Xen VM won't come up: could not find bridge device xenbr0 (configured to use routed)

I am using xen 4.4.1 on an Ubuntu 14.04 server, my DomU is running Ubuntu 14.04 Server as well. I've run this DomU in bridge-mode previously no problems. However I want to switch to a routed setup. I ...
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419 views

pfSense bridging Wi-Fi and LAN: allow access between Wi-Fi and LAN

EDIT: Why would I want to do such a thing? This is a test, and there is 1 machine behind pfSense that I wish to manage, and Wi-Fi makes that easy. Carrying on: The auto-suggessted topics by Server ...
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126 views

Intermitent connection issues inside LXC

I am experiencing connection issues inside a LXC that are driving me mad. They are intermitent. They appear during some time, and they suddenly disapear. Scenario A lxc inside a host. Both are ...
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linux bridge with vlans

I have a couple servers that I need to use lacp on that would hook in to the bridge for kvm to tap off of. I need to split out several vlans from there. my cisco switch has 2 ports set to trunk ...