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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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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Trying to create one ip subnet in two vlans bridged

The question is am i missing something while creating the bridge between two parts of the same ip subnet? What I am trying to do is to limit local services(by firewall) available to one of ssid's of ...
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Running two Ubuntu KVM virtual machines with bridged (tapped?) networking

I have a server that's running Ubuntu 14.04, and I'm trying to run two virtual machines with bridged networking at the same time. The networking of the first VM works, but the second one has no ...
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43 views

OpenVPN bridged mode, cant access private network

I am struggling with this problem and I just can't figure it out. I am using cloud servers and I got a private network from them with ip's 10.99.x.x and netmask 255.255.0.0 I have 2 servers: ...
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195 views

How can I connect my switch to my fibre connection?

Question We just got our ADSL line replaced with a Fibre optic line. Part of the Fibre-install included a Fibre panel (terminator?) and a Huawei switch. I'm not sure how to connect our existing ...
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Multiple IP's on the same bridge

I'm setting up a Ubuntu host machine for a couple of kvm virtual machines. Here is my interface config file: # config block 0 auto lo vmbr0 iface lo inet loopback iface vmbr0 inet static address ...
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34 views

Does the name eth0 matter?

I'm running Debian as the host and have a bridge for the kvm virtual machines. The bridge setup looks something like this: auto vmbr0 iface vmbr0 inet static address 192.168.0.100 netmask 255....
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192 views

how to bring up network-interfaces and bridges in specific order at boot time

Currently, my setup is having many nodes, each having RHEL 7 installed, with each node having only one single interface. I am using ovs-bridge and a vlan-tagged interface within the host. I use vlan-...
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34 views

Debian KVM network setup

I have a server with 4 ethernet ports. I want to use two ports for link aggregation to be used for KVM (virtual guests). How can I go about setting this up properly? Create the link agg first then ...
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73 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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599 views

CentOS, KVM, VLANs and bridging

I need help designing networking for virtualized guests using KVM. My machine is running CentOS 7 and has 2 NICs. I'd like to achieve the following One physical interface (em1) shall be used for ...
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224 views

Debian Linux routing additional IP to LXC

I'm trying to route an additional IP of my server from Hetzner to a LXC instance (on Debian Jessie). I've found this guide http://www.jotschi.de/technik/2012/04/18/hetzner-lxc-linux-subnet-...
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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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44 views

KVM/libvirt: Guest monopolizes bridge

I'm having a problem in which the first guest started on a VM host can send traffic through both of its assigned interfaces, but subsequent guests can only send traffic through one interface. My VM ...
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2answers
66 views

wget only works when tcpdump is listening

I am running two Virtual Machines over the XEN hypervisor both with Ubuntu trusty (Linaro-Developer version) with the following simple bridge networking setup: Backend domain (dom0): br0 ...
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33 views

VPN with VMware Player [closed]

I have 2 domains, prod and dev. Dev has a 1 way trust from prod (dev trusts prod, but prod does not trust dev). My host computer (laptop, win7 sp1) is a member of the prod domain and can VPN in for ...
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169 views

How to create bridged network interface for Xen?

I'm trying to use Xen on an Ubuntu server for the first time and have a really basic question. I'm following the guide in the Ubuntu docs and under the Network Configuration->Using bridge-utils ...
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29 views

L2 Bridging two Locations

I'm not really experienced in Advanced Networking topics, so any help would be much appreciated. We have to temporarily bridge the Network (multiple VLANs) of two Buildings over the Internet for two ...
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17 views

Bridge Mode with fail open

I have a GNU/Linux server running an HTTP reverse proxy (Nginx). The upstream server is well-know (IP address on a subnet). What I would like to "guarantee" is that in case reverse proxy goes down, ...
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61 views

Xen bridge - block traffic from port range - iptables / ebtables

I use Xen with bridge interface : - eth0 - viifbr0 - Name of VM interface : vifv10XX.0 Do you know if it is possible to block output traffic from source port range for a domU please ? If yes, can ...
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113 views

How to make a simple network bridge in Vagrant?

I'm trying do set up the most basic network bridge demo in Vagrant. I have two machines in the same subnet, but on different LANs, and a bridge machine with two interfaces and a network bridge that ...
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395 views

Docker Container can ping, but cannot telnet from Virutal Machine

I have a host (Ubuntu), a docker container (centOS), a virtual machine (centOS). - My Host has 2 interfaces, one is eth0 "192.168.0.4", one is docker0 "172.17.42.1" - My docker container have IP "...
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network configuration (bridging) proxmox

I bought yesterday an proxmox license. All works fine only the network configuration is very complicated. My network configuration: 84.200.50.186 -> hostsystem ip 84.200.50.186 -> VM ip 255.255....
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103 views

kvm network bridge on centos 6

I have a Centos 6 KVM host. I installed the KVM following this manual: https://wiki.centos.org/HowTos/KVM Its network has been configured as a bridge: [root@server ~]# ifconfig br0 Link encap:...
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Bridged VirtualBox VM with individual IP

On Debian hosts I run VirtualBox VM mainly to run WinX software. Some of these VM shall join AD and as such need fixed IP and shall be reachable from the LAN, i.e. NAT is no option. I considered ...
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125 views

iptables setup for bridge, redirect dns traffic

I am trying to forward dns traffic on a bridge to a local dns server and it wasn't working. As a thought exercise I decided to block all traffic and that too isn't working. Here is my setup : #/etc/...
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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 ...
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80 views

Bridge server for connecting two databases?

I'm in a bit of a pickle. I currently have 2 database servers. One is hosted in the US and is online on the internet. The other is local, working only on LAN and external connections are not allowed. ...
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140 views

ensure “switch redundancy” on a network

I'm struggling in connecting two Windows 7 PCs (each with a 2 port Intel NIC) via two complete redundant paths. And I want to make it transparent to the services on that system. I was thinking on ...
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152 views

Restarting network on Ubuntu 14.04 host running lxc

I know /etc/init.d/networking restart isn't supposed to work on Ubuntu 14.04 but I altered the script that it works. It always worked on all the Debian distributions I have used before and I do not ...
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32 views

VPN bridge duplicate routes

I'm trying to establish a VPN bridge between 2 embedded computers. VPN gets established correctly, however once tap0 interface gets created on the client's side, it creates a duplicate route: 192.168....
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54 views

TC - delete exact filter

Im't trying to automate traffic shaping on some system n one interface, using next script. This script adds classes and filters by one per class, width command like: tc filter add dev eth0 parent 1: ...
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130 views

IP conflict on a KVM bridge network connection

We're running a CentOS 7 server, with KVM installed on top of it, and the host has 2 Ethernet interfaces attached to it (em1 and em2). A new windows 7 VM was just created, and we wanted that specific ...
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323 views

pfsense NAT router - “live with” double nat (airport express)

I have a setup that have worked for years with a fiber to a NAT router to clients. Clients are typically cheap NAT routers of any kind. Setup like this Fiber from ISP | Router, pfsense -WAN - x.x.x....
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76 views

Routing issues with bonded VLAN trunk bridged to Xen dom0 on CentOS

I am setting up a new dom0 which has a LACP bond. Connectivity is fine between the network, dom0 and domU's without the trunk enabled. Once I start tagging traffic on the switch and add the ...
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71 views

ganeti network: change bridge name

I try to add an instance to network, first first I need to connect the network to a bridge. I'm using bridge vbr0 instead of standard xen-br0, gnt-cluster info shows that ganeti has the default set ...
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740 views

How to route traffic between 2 VLANs on different subnet

I have the following problem: I have one interface eth0 with IP 172.20.51.61/24 I have configured 2 VLANS on the same machine: eth0.120 : 172.20.52.61/24 eth0.200 : 172.20.54.61/24 I also have a ...
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125 views

OpenVPN Bridged client can't see rest of subnet

I've got an OpenVPN setup using bridging mode, as I need both clients and computers on the network to be on the same subnet. My server has eth0 and tap0 bridged into br0. The server can ping both ...
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164 views

How to get Ipv4 in NAT mode & Ipv6 in bridge mode together in Xen 4.4?

Here is my problem with Xen 4.4 wth Debian 8, i have one Ipv4 address & plenty of Ipv6 addresses. I would like to setup xen for NAT to route IPv4 to a private network and bridge with Ipv6 ...
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263 views

Ipv6 over bridged network stops working after some time (Ubuntu LXC)

i hope you can help me. I am running several Linux Containers on a bare metal server which is provided with an Global Ipv6 address as well as an 64-bit network by my provider. I have configured IPv6 ...
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166 views

DSL modem in bridge mode but router not accessible from the internet

I have a DLink ADSL modem which I have put into bridge mode and connected to a Fortigate 200A firewall. The Fortigate is able to connect through PPPoE and receives the static public IP. I can browse ...
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2answers
362 views

Add a network bridge to Ubuntu and lost internet and lan connection

I'm trying to make network bridging to work on a Ubuntu 15.04 (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 ...
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How can I bridge an HTTP server from an interface to another in Linux?

In a Linux server I have an HTTP server that's available at eth1 with ip1, and I want to make it available to the network in eth2 with ip2. How can I do this? Example: I have an http server on 192....
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592 views

Is there any disadvantage to putting a modem in bridge mode

In order to prevent the need of port forwarding and double natting I plan to put a modem into bridge mode. Are there any side effects or problems that could come of placing a modem into bridge mode in ...
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136 views

Creating several kvm bridges over tagged bond

I have the following configuration in a RHEL6.5 which works great. # ifcfg-em1_2 DEVICE=em1_2 HWADDR=C8:1F:66:D8:77:D2 TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=no MASTER=bond0 SLAVE=yes USERCTL=no #...
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447 views

VMWare ESXI vNetworking - vSwitches bridged by multiple multiple Layer 2 bridge hosts

I want to create a multi-VM pfsense cluster ESXI. For those that are not familiar with pfsense, consider it a Free BSD based router/switch (with many features on top of it, but not necessary for this ...
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584 views

Setting up site-to-site IPsec in bridged mode

I'd like to set up site-to-site IPsec in bridged mode: that is, where the hosts in each site don't need to be modified to use the IPsec gateway, but the IPsec gateway acts as a pseudowire. My plan to ...
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2answers
897 views

Linux Routing with two NICs (LAN vs Internet) with NAT and bridging for VMs

My Setup: There is only one physical machine in this setup, a Host System for Virtual Machines (VMs) with two network adapters. One NIC (eth0) is connected to an internal network (LAN subnet, e.g. ...
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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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1answer
792 views

CentOS 6 ELRepo kernel bridge issues

I'm currently running the following Kernel on CentOS 6.6 from ELRepo [root@de14 ~]# uname -r 4.0.4-1.el6.elrepo.x86_64 Anything related to a bridge doesn't work, what I've come to ...