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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Configuring Container with bridges and vlans (server only?)

I have two groups of lxc contianers on a server and want to isolate their network traffic for security reasons. I will be using port forwarding so the containers much each have separate IP's. I know I ...
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75 views

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 ...
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64 views

Xen networking - dom0 receives ARP requests but no reachability

Both dom0 and domU are Debian 8. Dom0 network configuration is: auto xenbr0 iface xenbr0 inet manual bridge_ports eth1 bridge_stp off bridge_waitport 0 bridge_fd 0 auto xenbr0.4 ...
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98 views

Add a second bridge to a virtual machine

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 ...
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23 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 ...
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121 views

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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492 views

Booting a diskless Debian system using bonding, bridging, and iSCSI

I'm trying to build my personal holy grail: booting my Debian Wheezy KVM server diskless from a iSCSI target and the only configuration needed on the diskless server is the iSCSI parameters in the NIC ...
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593 views

Proxmox Host on OVM Hardware - Guest VM's cannot reach Internet hosts by name

I have setup a Proxmox Host on OVM Hardware and am giving the guest VM's Internet access using the Bridged setup. However, as this requires editing configuration files on the Guest to work correctly, ...
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601 views

access tap interface in network namespace across machines

I want to be able to access services running on a TAP interface within a namespace from outside the machine where it is running. I have setup that looks like this - VM1/Machine1 +eth0 : Public ...
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503 views

Networking with lxc containers with local dhcp and external ipv6 double bridge problems

I want to use both ipv6 externally on all my containers, and ipv4 external only on the hosts. I am using Ubuntu 12.04 64bit. For ipv4 on the container I use the DHCP that came with the lxc ...
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413 views

OpenVPN: Run 'bridge-start' on boot before starting openvpn service (Ubuntu)

I've got OpenVPN working properly on my server, using bridge-start and bridge-stop scripts to create and remove network bridge, respectively. How do I set these scripts up to run bridge-start at boot ...
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151 views

dsl router for bridging two lans

I have two office locations that each have DSL service. I have the routers set up so that the two subnets, 10.0.1.x and 10.0.2.x, correctly keep data on each subnet and or pass across to the other ...
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1k views

bypass ip destination squid tproxy bridge

I have configured a squid transparent tproxy. All works fine. Now I need all the traffic going to an external IP (internet) does not pass through the proxy. Do I need to modify iptables, ebetables ...
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1k views

Site-to-Site IPSec VPN: bridged only

I'd like to setup a site-to-site IPSec VPN tunnel between a head office and a branch office, and for political/security reasons, with the sole purpose of being able to access a "Management" subnet at ...
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33 views

How to correctly set up a bridge interface in GCE

I'm trying to set up a bridge interface as described in many docs, for instance: https://help.ubuntu.com/community/OpenVPN My setup in identical to that one, except obviously I used my GCE internal ...
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114 views

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 ...
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12 views

Dell Switches and Spanning-Tree Route ID Configuration

I am analyzing a network for a colleague. It's a fairly simple topology and all the switches have converged on a common root-bridge, however two of the non-root bridges have identified the root as the ...
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69 views

Adding multiple vlan interfaces into bridge (ovs)

I am adding multiple vlan interfaces (eth3.409, eth3.410, ...) to a bridge, furthermore I also add the eth2 interface (local network) to the bridge. eth3 is a trunk with 13 different vlans. The ...
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29 views

Create 3 virtual interfaces that can ping6 each other

In Linux, how can you create 3 virtual interfaces that are bridged together through a virtual switch so that they can ping6 each other? What I did: tunctl -t tap1i tunctl -t tap2i tunctl -t tap3i ip ...
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214 views

Make LXC containers directly accessable with ipv6

First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc). Now I would like to run LXC containers ...
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195 views

Xen: network between dom0 and domU does not working, while network between particular domUs does

I am unable to establish communication between domU and dom0. I have two domUs and they are able communicate between each other. Dom0 is connected to Internet. I just need network between dom0 and ...
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1k views

Bridge on vlan on teaming for KVM

I have problem to create bridge on vlan on teaming. Why I do something like that? - Kvm needs bridge - Vlans because I need vm’s in different subnets - Teaming in option active-backup (small HA) I do ...
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350 views

Trunk vlans inside openvz container (Proxmox)

I have a node running OpenVZ CT (ProxMox). eth1 on HN are bridged through vmbr1 to veth device on CT101 (eth1 inside container). (Host Node) eth1 -> vmbr1 <- veth101.1 <- eth1 (CT101) No ...
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81 views

Bridging two datacenters

i need to find out what would be best way to bridge current datecenter with new DR datacenter. I have following network configuration (show in picture). http://i.imgur.com/7bohb3I.jpg So on internal ...
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1k views

iptables configuration for squid proxy in bridged mode

I recently set up a squid proxy in bridged mode. But Squid is not caching due to some firewall issues I guess. Manual caching is perfectly ok. Here is what I have set up in /etc/rc.local ifconfig ...
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87 views

Bridging Adapter in Ubuntu 12.04 LTS for KVM

Fresh install of Ubuntu 12.04 LTS with libvert/KVM installed. I have 2 virtual machines that I need need to be on the same LAN as the host. The host has two physical interfaces eth0 and eth1. eth1 is ...
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677 views

debian KVM - network bonding fails with vlan and bridge

i have a Debian 6 system configured with 2 NICs these NICs are used on a bond (bond0) which is used by bridge that require to use VLAN. i can get connection between guests running on VLAN10 but it ...
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1k views

arp reply is not processed

My eth0 interface does not process a legitimate arp reply. When I try to ping a host, I see arp request and reply with tcpdump from the host I try to ping from, but ip neigh says that there is a ...
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106 views

STP on a bridge

I have set up a bridge on an interface em1 and connected 4 vms to the bridge. I disabled stp on the bridge. There is no chance of looping as there is only one bridge in this setup, there occurs a BPDU ...
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621 views

VirtualBox - multiple guests, each with a single bridged adapter?

I am running a dedicated server (located at Hetzner, Germany) that runs VirtualBox in order to virtualize several services accross multiple virtual guests. Those guests are supposed to communicate ...
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834 views

openstack, bridging, netfilter and dnat

In a recent upgrade (from Openstack Diablo on Ubuntu Lucid to Openstack Essex on Ubuntu Precise), we found that DNS packets were frequently (almost always) dropped on the bridge interface (br100). ...
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367 views

kvm bridge network not working

I have several KVMs and using public bridge mode. VMs can talk to each other but VMs can't access real network and the host can't reach VMs. One weird thing is that it used to work before and it ...
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210 views

Problems with umlauts and git-svn

I've got the following problem: I checked out an GIT-repository created by tortoise-git under windows. German umlauts like "öäü" are shown as \x-Codes under my linux. That's basically no problem ...
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13 views

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 ...
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12 views

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 ...
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13 views

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 = ...
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14 views

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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12 views

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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12 views

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 ...
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24 views

IP aliasing to a bridge interface under systemd

With Debian 8.1, how does one add a second IP address to a bridge interface under systems? Like in "IP Aliasing"? I tried it this way... In /etc/systemd/network subdirectory: File 40-br0.netdev ...
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19 views

Without tcpdump running, Linux bridge works selectively

Architecture: Ubuntu 14.04 as a libvirt/KVM host with one VM. There is bridge bri17 on the host, with two interfaces: eth2.17 (uplink to the Internet) and vnet0 (to the VM). Symptoms: all tests ...
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83 views

What's the FreeBSD equivalent for the Linux pointopoint

What's the BSD (FreeBSD) equivalent of pointopoint used in /etc/network/interfaces on Linux (Debian)? I'm following this (Network configuration host system KVM/Routed) guide for how to use Hetzner's ...
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11 views

Two(one OpenVPN) Networks Routed to Two Seperate Interfaces

I currently have a working network configuration. It is setup so that my Debian router connects to my modem, grabs an IP from DHCP using the physical eth0 interface connected to the WAN port on my ...
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50 views

Proxmox VMs with single IP

so I don't know much about the bridges and all, but I looked around and tried to get it still working. I've got one IP for the server itself and I thought to use second IP on the VMs. I thought I did ...
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37 views

openvpn multiple bridged connections

Have problem connecting several physical network segments using openvpn, please help. Have 172.16.0.0/16 network that consists of 3 segments: First one: 172.16.2 with 172.16.2.1 linux router that has ...
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ARP cache getting null mac over a bridge

I have an interface eno1 and a bridge br0 $ ifconfig br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.250.53 netmask 255.255.255.0 broadcast 192.168.250.255 ...
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15 views

Setting up bridge for domU to be accessed from external network(internet)

I am trying to setup virtual guests(PV) using xen 4.4 (xen-tools) on debian 8.3. Problem is that I fail to configure bridge properly I guess ^^. I have setup an interface xenbr0 that uses same IP ad ...
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55 views

How to configure netflow on linux bridges(“docker0” Bridge)

I have Openstack setup which one of the compute node has docker and if I want to monitor the traffic, how to configure netflow on "docker0" bridge/Linux Bridge. I can see the bridge name and ID with ...
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115 views

OpenVPN Access Server Site-to-Site Layer 2 Bridging. DHCP Issues

First of all sorry, my english is a bit sucky or broken at parts. I'm having a little issue with OpenVPN S2S Layer-2 Bridging and DHCP over the bridge. First of all, all clients no matter on which ...
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48 views

Not able to ping ips created inside docker container using namespace in centos7

I have a docker container running inside centOS7. Now docker creates a bridge by default named as docker0 in host system. Inside the docker container, we have created another bridge named as eth2 ...