A network bridge is a network device which transparently forwards packets between two or more network segments so that they appear as one local area network (LAN).

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Add virtual bridge without the loss of networking?

There is a dedicated server without KVM-over-IP support. The server 'owns' two IP addresses, and one of those is used for eth0 at the moment. The user needs to add a virtual bridge, in order to ...
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12 views

Linux Container LXC Intra Host Networking Issues

I have a problem that I cannot seem to resolve. I have two hosts M and N. A container in host M can ping the gateway, its host and all containers in Host N but cannot ping any co-hosted container in ...
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20 views

Cannot get IP address from WiFi access point (hostapd) with DHCP (dnsmasq) bridged with two ethernet adapters (bridge-utils)

My Android phone is trying to get DHCP address through WiFi connection, but fails. Obviously, I might have messed up something in my settings because I couldn't find a complete guide which would let ...
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0answers
33 views

Packets drops seen in physical interface while using kvm bridge

In ubuntu kvm hypervisor we are seeing packet drops in the physical interfaces once we create the bridge. Below is the output of ifconfig, br1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx ...
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43 views

Creating an open wifi acess point for April Fool's Day which I want the client can only visit the login/splash page, but not working

I bought a Hiwifi J2 (Chinese) router, and sysupgraded to OpenWrt (not official version, but a patched version based on OpenWrt Barrier Breaker: https://github.com/rssnsj/openwrt-hc5761). Then ...
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1answer
24 views

multicast frames in Linux virtual-switch

I have a network topology where in "Dell PE860" runs a Linux virtual-switch br0: Now if I send an Ethernet frame to broadcast address from "IBM ThinkCentre": 17:10:23.569021 00:a1:ff:01:02:05 > ...
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1answer
236 views

Does Linux virtual bridge support VLAN's?

Does Linux virtual bridge(configured with for example ip or brctl) support VLAN's? For example configure access ports in different VLAN's and trunk ports with only certain VLAN's enabled. Only option ...
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31 views

eth0/usb0 bridge breaks after removal and replacing android phone

I'd like some help with a networking bridge issue I've run into. I'm trying to make a bridge with eth0 and usb0 (my android phone). After running the brctl commands the bridge works wonderfully. But ...
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1answer
45 views

How to understand virtual switch in Linux?

I have a following virtual Ethernet switch in Linux: root@vmhost:~# brctl show br0 bridge name bridge id STP enabled interfaces br0 8000.266b04c4a79a no ...
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1answer
118 views

CoreOS in Vagrant - interfaces

I'm trying to understand the networking model in CoreOS but I'm having trouble making the operating system bend to my will. The problem I'm facing is that I want to use weave as an overlay network ...
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0answers
25 views

Outgoing masquerade address changes after adding a second interface to the bridge

In fact I have the following configuration: extrouter(192.168.1.1) <- wifi -> [eth2 (192.168.1.11) Centos 6/6 based host br0 (172.22.5.254)] br0 contains two tap interfaces (tap0/172.22.5.1 ...
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68 views

Unable To Bridge Two Teamed Interfaces - Advice?

Before the wall of code I'll explain the situation. I'm trying to set up two interfaces to be teamed together, and from that team create a bridge. I've been studying for the RHCE and I believe this ...
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0answers
78 views

OpenWRT on embedded device as firewall

I have the following setup in my network: My internet comes in through an ATT Uverse modem/router. The router is in bridge mode because that ATT Uverse modem/router connects to a second higher ...
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0answers
41 views

synproxy on a bridge

I am trying to implement synproxy to my firewall, on a bridge interface (between eth1 and eth2). Here are my rules: /usr/local/sbin/iptables -t raw -i PREROUTING -i br0 -m physdev --physdev-in eth1 ...
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2answers
295 views

How to find MAC or IP address of a device connected to the same Ethernet bridge?

I have the following topology: DeviceX ------ | DeviceX bridge with two Ethernet cards (created with bridge-utils) ---------------- router | ...
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1answer
32 views

Access network of PC2 from virtualbox installed on PC1

I am going to attend one seminar where I need to bring laptop with installed Virtualbox and Windows 7 running inside it. My laptop is too old to handle Virtualbox with Windows 7 and native Linux ...
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0answers
72 views

How to create a wireless-to-ethernet router?

I have a Debian machine, which I want to turn into a router. It will connect via wireless to a access-point, where it will get an IP. To its ethernet port, other machines will be connected. It will ...
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1answer
41 views

How can I have a bridge that uses DHCP?

I have set up a linux box (centos 7) to use for virtualizing some servers. I have set up a bridge, but I need to do it with DHCP, but it doesn't seem to like it. The reason I need DHCP is because ...
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0answers
92 views

default route of br0 gets dev eth0 instead of dev br0

On my LinuxMint laptop, i have a recurring problem with my bridge br0. On each start up, the default route does not work. The routing table uses eth0 instead of br0 probably because of dhcp. i roam ...
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1answer
577 views

Bridge does not get IP via DHCP at boot

I'm running CentOS 7. I'm not running NetworkManager, and I've actually uninstalled it. My system is supposed to acquire an IPv4 address via DHCP on br0 at boot. Howver, when I log in, it has no ...
2
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1answer
109 views

Wireless network bridge

I am trying to create a network bridge to allow virtual machines to use my wireless card to connect to my home network. My plan was to do something like: iw dev wlp12s0 set 4addr on brctl addbr ...
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0answers
152 views

Packets switched through Linux bridge have very high packet delay variation and latency? [closed]

I configured a very simple bridge under Debian Wheezy(kernel 3.2.0-4-686-pae). I simply created bridge interface with brctl addbr br0 and added interfaces eth1 and eth2 into this bridge with brctl ...
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0answers
60 views

linux vlan bridge feature backport to 2.6 kernels

The VLAN-aware bridge was introduced to the Linux mainline on the 3.x kernels, according to this article on lwn: VLAN filtering/VLAN aware bridge Has this feature been backported to the 2.x kernels ...
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278 views

rp_filter dropping packets in linux bridges+vlan_tagged interface + tap interfaces configuration

I've a linux bridge which has it's first interface as a eth0.123 (VLAN tagged interface) & one or more tap interfaces created by kvm. (libvirt+kvm VM) [root@compute1 ~]# brctl show bridge name ...
2
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1answer
49 views

How to count the number of interfaces in a bridge

I want to bring a bridge down only when the last port is removed and so I have this somewhat hokey check to do it brctl show looks awkward to parse to get the information out and doesn't feel much ...
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0answers
110 views

How to bridge a VM to public IP

I wish to to assign the IP from my eth1:2 to a VM; I also have no use of this IP for the host, it would be desirable to be exclusive to the VM. I've ended up with a setup just like this (eth1:1, ...
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1answer
59 views

Understanding linux Bridging

I have started learning networking and recently been through bridging in Linux. Bridge in Linux could be set in two ways as far as I have got by reading on internet i.e. either by bridge-utils ...
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36 views

Bridging/Sharing a networkable printer in freebsd

I'm trying to "bridge" a ricoh laser printer to the rest of my network with a freebsd box, I have some other services running on there, such as mediatomb and have been using it as a file/media server. ...
2
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3answers
121 views

Bridge/Router with custom logic

I've a Linux box with 3 network adapaters, which I'd like to configure as follow: Adapter A is connected to computer A Adapter B is connected to computer B Adapter C is connected to the Internet. ...
0
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1answer
79 views

trouble bridging tap0 and tap1

I have a GNS3 router that is connected to tap1 in my host. On the other hand, I have an user application connected to tap0 running locally in my host. I can ping both the router and my application. ...
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1answer
328 views

Allow multicast packages from the bridge to wire in KVM

On a CentOS 6.5 host, I have a couple of guests - Ubuntu 12.04 and CentOS 6.5. The Ubuntu guest is generating mcast traffic that is visible via a tcpdump on the br3 interface. It is also visible on ...
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1answer
127 views

Create virtual network adapter with own MAC and IP?

I have a server with 4 different IPs over one real NIC. Now i try to setup different virtual network adapter in debian with this IPs. The Problem is, that each IP needs also a specific MAC. Otherwise ...
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0answers
96 views

I have a firewall bridge in pfSense and I want to log only the allowed packet

I have a bridge0 which has members em0 (wan) and vge0 (lan) I connect via ssh on vge0, when I tcpdump -i pflog0 I get the blocked packets from the bridge0, but when I tcpdump -i bridge0 I get both ...
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0answers
41 views

bridge or iptables or route?

iptables vs bridge-utils vs route I have two network cards in a Linux server and don't know how to make them communicate. After searching a lot I still don't know which method is the one that should ...
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1answer
702 views

How to bridge two WiFi interfaces on raspbian

How can I bridge two WiFi interfaces (wlan0 and wlan1) on raspbian? I tried using brctl but i get the following message can't add wlan1 to bridge br0 operation not supported. Is there any other way to ...
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219 views

Forward multicast between two LAN segments (Chromecast)

I've found some rules but most are inconclusive. Chromecast uses DIAL and discovers via multicast from what I've understood.. I have an Ethernet-connected computer which I would like to route via my ...
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0answers
103 views

Debian, Dibbler, IPv6 and Bridging Woes

I'm currently trying to setup my Dedibox LT as a virtualisation (KVM) server. I've elected to use Debian instead of Proxmox or ESXi for various reasons. Currently I'm having problems with getting ...
6
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4answers
4k views

Docker + Bridges + DHCP

I have a lot of docker containers that I need addressable on the the same LAN as their hosts. Up until now, I have been achieving this by using setting up a bridge and manually assigning them IPs, and ...
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0answers
55 views

No traffic tc class at bridge interface

I make bridge interface like this [root@]# brctl show bridge name bridge id STP enabled interfaces br67 8000.002655e38b20 no eth6 eth7 ...
0
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1answer
112 views

Plain Bridge vs. Open vSwitch

Is there any performance benefit in using Open vSwitch over a plain bridge?
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0answers
311 views

Debian WLAN to LAN bridge, double IP address

Target device is Raspberry Pi, with Debian running kernel 3.12.9-1+rpi1. I want to bridge USB WLAN card with local Ethernet NIC, but I want to have 2 IP addresses on that bridge interface, one from ...
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1answer
549 views

Why IP address for Linux Bridge which is layer 2 virtual device?

Shouldn't bridge (or a switch) be working without having an IP address? I believe I can have a bridge br0 setup with eth0 and eth1 as members both having no IP addresses. I can't understand why an ...
5
votes
1answer
2k views

How can I most simply transparently bridge traffic between wlan0 and eth0?

I am looking to do this on a Raspberry Pi, but I don't mind which operating system I have to install, so the easiest most out-of-the-box solution for Pidora (Fedora 20 Remix), Raspbian (Debian) or ...
0
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0answers
120 views

How to merge two network interface in one?

I have two network interface on my router: wlan0 and wlan1. First for 2.4Ghz and second for 5Ghz. Also i have Coova-chilli with setting HS_LANIF=wlan0. Therefore captive portal (chilli) work for only ...
3
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1answer
439 views

Docker error creating bridge

after installing Docker on a Ubuntu 14.04 minimal system with these commands, apt-get update apt-get install docker.io ln -sf /usr/bin/docker.io /usr/local/bin/docker sed -i '$acomplete -F _docker ...
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0answers
194 views

Bridging lxc vs virtualbox

Something that is confusing me is the difference between "bridging" with a Virtualbox VM, and an lxc container. When you start a start a VM, the VM creates a bridge ( apparently ) as a user. ...
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0answers
32 views

Can we add ports to OVS AFTER the VM is created?

I wanted to write up a program where I can create VMs first using libvirt. Initially they would not be added to any network. Then I want them to be attached to an OVS bridge where I can specify the ...
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0answers
62 views

Bridge-utils installed on ubuntu 13.04 but unable to start the service

I upgraded my laptop Ubuntu 12.04 to 13.04. Before upgraded to Ubuntu 13.04, I installed qemu-kvm, bridge-utils, libvirt-bin & ubuntu-vm-builder. There its worked properly, After upgraded to ...
2
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0answers
697 views

Multiple virtual interfaces all bridged to eth0

I'm following this tutorial for setting up bridged a bridged Ethernet interface using uml-utilities and bridge-utils and it works for 2 interfaces but no more than 2. What I'm trying to achieve is ...
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0answers
105 views

Problem with getting bridge to work when set up with a script

I'm trying to set up a bridge, essentially turning my machine into a switch. I'm running a dhcp server on the same machine with INTERFACES='br0' as the interface setting. /etc/network/interfaces ...