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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VMWare networking mode (NAT or Bridged)?

I am running Windows 7 within a virtual Machine from my Mac. I use Windows 7 for Visual Studio primarily and also to host a dev install of IIS. There are two things I need and I am not sure what ...
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2answers
391 views

bridge network between two linux servers

I need to set up following network architecture : Internet ^ +-----------------+ | +------------------+ | Centos6-1 | | ...
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5answers
8k views

ARP replies contain wrong MAC address

I've got a robot running linux with wired and wireless adapters. When I boot up, it connects to the wireless fine. When I assign an IP to the wired (either statically or with DHCP), it looks like it ...
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2answers
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Bridging wlan0 to eth0

On arch Linux, I would like to mainly have eth0 (connected to bridged router) share the connection recieved from wlan0, Ive read tutorials but I'm not command sabby as other users are and don't ...
8
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2answers
2k views

Jumbo frames between KVM guest and host?

I am trying to implement a 9000 byte MTU for storage communication between KVM guests and the host system. The host has a bridge (br1) with a 9000 byte MTU: host# ip link show br1 8: br1: ...
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3answers
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Iptables - Bridge and Forward chain

I have setup ethernet bridge br0 that contains two interfaces eth0 and tap0 brctl addbr br0 brctl addif eth0 brctl addif tap0 ifconfig eth0 0.0.0.0 promisc up ifconfig tap0 0.0.0.0 promisc up ...
7
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2answers
914 views

Linux-KVM networking advice?

Being new to virtualization in general, and somewhat new to Linux (using Debian Squeeze and coming from BSD) I have a hard time understanding what would be the best network bridging option for my host ...
7
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1answer
2k views

How to prevent IP spoofing using MAC and ebtables?

I am trying to create IP-MAC pairing rules in ebtables. There are few tutorials and related questions [1] available but I have kind of specific setting. ENVIRONMENT: I have many physical hosts. Each ...
7
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2answers
490 views

How can I prevent the locally administered bit being set on network bridge MAC addresses in Windows?

When adding network adapters to a network bridge, it generates a new MAC address from one of the unbridged ones but with the locally administered bit set. For example, if the original MAC address is ...
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2answers
239 views

Is this one network or two networks?

I have this simple question and really don't know the answer. Does the drawing below show one network or two networks? This is a question about the definition of a network from the OSI / TCP/IP model ...
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2answers
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OpenVpn bridge interface does not respond to incoming packets from outer network !

We are trying to set up a roadwarrior vpn setup with openvpn. We want the people to be able to connect to our network via openvpn. And we want them to be able to see and connect to the machines in our ...
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0answers
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Why do I need to assign static ip address to the bridge and not to the physical interface? [duplicate]

I have bond0 with two physical interfaces in it. Normally I used to assign static IP address to this bond0 to set up internet connectivity on the server. Now, because of LXC virtual guests, I had to ...
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2answers
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What is bridge_fd?

I'm creating bridge network on Ubuntu 9.04(server) I set up following configuration file /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet manual auto br0 iface br0 ...
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3answers
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Linux bridging not forwarding packets

I am trying to set up a Linux bridge with 2 ethernet interfaces and cannot get it to work correctly. I am using Gentoo Linux and thought it would be quite easy but I end up having trouble getting ...
5
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2answers
306 views

Creating a network link between 2 very close buildings

I have a charity who have two adjacent medium sized modern detached houses (in the UK): the buildings stand next to each other and are less than 5 metres apart. They have DSL connected to a single ...
5
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1answer
548 views

Network bridge and broadcast ethernet frames

Let R1 and R2 be two (wireless) routers. Both R1 and R2 have one wired interface eth0 and one wireless interface wlan0. On each router, both interfaces are bridged on br0. So: R1.br0 = R1.eth0 + ...
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2answers
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Bridging LXC containers to host eth0 so they can have a public IP

UPDATE: I found the solution there: http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#No_traffic_gets_trough_.28except_ARP_and_STP.29 # cd /proc/sys/net/bridge # ls ...
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6answers
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Networking problems in VMWare with wireless bridge

Barebone data: virtualization: VMWare Workstation 6.5 (latest) Host: Windows Server 2008 x64 Guest: Windows Server 2008 x86 Host network adapter: Ethernet (see comment) Host network adapter: ...
4
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1answer
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How can I change the MAC address of a network bridge in Windows?

I use DHCP reservation rather than static IP for convenience, and that relies on the MAC address of my computer. I recently bridged my main adapter with my VirtualBox adapter. When things stopped ...
4
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3answers
228 views

How strict is line of sight?

The college where I work is wanting to expand our network connection out to the field house building, located about 1/2 to 3/4 mile away from the rest of campus. I'm looking at one of these as a ...
4
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2answers
9k views

What is the correct way to setup a bonded bridge on Centos 6 for KVM guests?

What is the correct way to setup a bonded bridge on Centos 6 for KVM guests? I'd currently playing around with a setup of two KVM-hosts which will each host several guests. I have two HP DL380:s with ...
4
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1answer
311 views

New KVM guests cannot access outside LAN

I have a KVM host (at 192.168.0.10) that currently has one working KVM guest (at 192.168.0.12). On attempting to install a new KVM guest today, I reached a problem where the network on the new guest ...
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2answers
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Creating a private network for two VMs

I am trying to create two VMs which are both connected to the same private network. I'm using Linux with qemu-kvm 1.0. My plan of attack has been this: brctl addbr bridge ifconfig bridge up tunctl ...
4
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1answer
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KVM and bridge_stp setting

In which situation one should enable the bridge_stp for the host bridge when using KVM? Is it worth keeping it disabled when not needed?
4
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1answer
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How to use VirtualBox as a router without NAT between two subnets?

My host machine is in a 192.168.2.0/24 subnet and I wanted to set up a 10.0.0.0/8 network with various hosts in VirtualBox that talk to each other. So VirtualBox should act as a router between those ...
4
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1answer
3k views

Stop duplicate icmp echo replies when bridging to a dummy interface?

I recently configured a bridge br0 with members as eth0 (real if) and dummy0 (dummy.ko if). When I ping this machine, I receive duplicate replies as: # ping SERVERA PING SERVERA.domain.local ...
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2answers
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How do I put a bridge on top of a bonded interface?

I'm setting up a Ubuntu Server 11.10 box with multiple Ethernet interfaces that are bonded for redundancy. I'm planning to use it as a KVM host, so I'll need a network bridge. To accomplish this, I ...
4
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1answer
1k views

Is there a better way to do bonded vlan tagged interfaces with XEN

We have a number of XEN servers all running CentOS or RHEL. The VM's that they run are all required to be on their own VLAN for no other reason than the customer expects them to be. Long story short ...
4
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2answers
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KVM network bridge with two NICs

Greetings, I'm trying to set up bridged networking with KVM and am getting nowhere. There are docs and tutorials on the subject, but they all seem to conflict or don't provide enough info. I was ...
4
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2answers
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Bridging VirtualBox over OpenVPN TAP adapter on Windows

I'm trying to configure a virtual machine (VirtualBox guest running Backtrack 4) with a bridged adapter over a VPN connection. The VPN is is hosted by the cybersecurity club at my university, and ...
3
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4answers
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Split your DHCP scope among multiple servers?

I want to implement a redundancy solution. I have two subnets all windows XP machines - each with their own DHCP server - joined by a bridge. Currently - all machines get DHCP leases from the one ...
3
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2answers
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Debian: Should I add vlan interface into bridge for KVM?

I am setting up a Debian Squeeze box as a KVM host. I want to add multiple interfaces to each KVM guest so I want them to be on different VLANs. After reading about this, I believe the best method is ...
3
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2answers
319 views

How to bridge multiple wireless access points (and internet entry points) into one network

I have two DSL lines coming in to wireless access points and then running to a RV082 Gateway/Bridge. The gateway then runs to a switch, which runs to multiple PCs and a Printer (See picture below). ...
3
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2answers
133 views

need advice on data center move, communication with both facilities during transition

We are beginning the process of moving to a new facility. Office and warehouse operations will both be moving, and we must get shipping operations up and running at the new location while continuing ...
3
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2answers
1k views

FreeBSD 9.1; bridge0 and default gateway issue

I've got a FreeBSD 9.1-RELEASE-p1 system with three nics, I'm using: igb0, sfxge1 and sfxge2. igb0 used for internet access and is default gateway. Other two nics, I need to use to create bridge0. ...
3
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3answers
774 views

Setting up bridged LXC containers with static IPs

I'm trying to setup multiple LXC containers on a host, each with public static IPs of their own. My host is running the latest Ubuntu. It has a single network interface named eth0. The static IPs ...
3
votes
1answer
976 views

Bridge and OpenVPN with shorewall

I have this scenario and everything it's working OK, but I want to configure my Shorewall and I can't do it. My interfaces are: br0 (bridge of eth0) tun0 (OpenVPN) vnet* (each one of bridged ...
3
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2answers
70 views

VMware two vSwitches Guests can't communicate between them

I have some servers in this configuration: (complete configuration) And I am not able, from VMGuest1, to ping either VMGuest3 or VMGuest4. I can, however, ping Host1 and Host2, which are attached ...
3
votes
1answer
140 views

Server ethernet bridging, fail-safe [closed]

Is there server hardware available with two ethernet ports, that can turn into a fail-safe bridge when offline? My use example is a server that does filtering and traffic monitoring on an ethernet ...
3
votes
2answers
985 views

NATing IPv4 while routing IPv6

I've the following setup: client(s) <---> (eth0) router (eth1) <---> wan I have a static IPv4 address and a /48 IPv6 address block. I need to connect all the clients to (wan). Each ...
3
votes
5answers
5k views

Linux Ethernet/wireless bridging

One of our new requirements for a product I work on is to support Ethernet-to-wireless bridging. Suppose we have two network interfaces: eth0 and ath0 (we're using the Madwifi driver). What sort of ...
3
votes
1answer
485 views

libvirtd kvm networking on Centos5.4

I've got KVM installed on CentOS 5.4, and am attempting to set up a virtual network to allow each VM to communicate with services on the host, namely DHCP to allow PXE boot installations. I'm having ...
3
votes
1answer
414 views

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 ...
3
votes
1answer
647 views

Can I set up two NICs bridged together and still SSH into the bridging machine?

I have a ubuntu box setup with two NICs. I can bridge them together just fine, but I haven't been able to setup a way to SSH into the box once the connections are bridged together. Here's my ...
3
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1answer
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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 ...
3
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3answers
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No IPv4 address assigned to KVM VM

I'm having trouble setting up KVM w. bridged networking in Ubuntu 10.10. I'm starting my VM through virsh, after this I can see the kvm process and vnet device on the host machine, but the new ...
3
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1answer
3k views

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 ...
3
votes
1answer
969 views

eth0 on lxc does not work

I am facing some problems that the eth0 on lxc container does not work. I already tried Bridging LXC containers to host eth0 so they can have a public IP, but it does not help. On my host (Ubuntu on ...
3
votes
1answer
538 views

Network Bridge in dom0 can not ping domU's

I am using Debian wheezy with XEN 4.1. I have two network bridges xenbr0 and xenbr1. xenbr0 is linked to the real-eth0-nic so the domU's can talk to the outside world, which worked fine. xenbr1 was ...
3
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2answers
1k views

Create a bridged network connection using only the command line

I want to bridge two network connections on a Microsoft Hyper-V Server 2008 R2. As I'm essentially using a "Server Core", GUI is not available, so I can't use the usual way. (Right click the network ...