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.
17
votes
10answers
7k views
What's the difference between a bridge and a switch?
I can't find any authoritative source that can concisely explain the difference between a bridge and a switch. As far as I can tell, most devices commonly referred to as "switches" fit the description ...
10
votes
2answers
329 views
bridge network between two linux servers
I need to set up following network architecture :
Internet
^
+-----------------+ | +------------------+
| Centos6-1 | | ...
9
votes
5answers
5k 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 ...
9
votes
3answers
20k views
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 ...
8
votes
2answers
644 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: ...
7
votes
1answer
11k views
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 ...
7
votes
2answers
835 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
votes
2answers
217 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 ...
6
votes
1answer
1k 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 ...
6
votes
0answers
70 views
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 ...
5
votes
1answer
249 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 + ...
5
votes
6answers
7k views
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: ...
5
votes
3answers
188 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 ...
4
votes
1answer
1k views
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
votes
3answers
216 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
votes
3answers
4k views
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 ...
4
votes
2answers
6k 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
votes
2answers
765 views
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
votes
1answer
696 views
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
votes
1answer
815 views
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
votes
1answer
907 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 ...
4
votes
1answer
680 views
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 ...
4
votes
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
votes
1answer
2k views
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 ...
4
votes
2answers
5k views
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 ...
3
votes
4answers
10k views
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
votes
2answers
10k views
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 ...
3
votes
2answers
1k views
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
votes
2answers
263 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
votes
2answers
110 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
votes
3answers
4k views
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
...
3
votes
2answers
154 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
votes
1answer
573 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
votes
1answer
66 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
687 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
1answer
465 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
444 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
votes
1answer
1k views
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
votes
3answers
2k views
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
votes
2answers
3k views
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 ...
3
votes
1answer
592 views
Any way to make a virtual bridged network adapter in windows? Like VMware has?
is there any way to make a virtual network adapter in windows (that has its own mac address, and lets me bridge it to another connection? So in the end, it'll be like another physical connection ...
3
votes
2answers
2k views
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
...
3
votes
1answer
292 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 ...
2
votes
2answers
2k views
KVM bridge trouble in Ubuntu (server 9.04)
I make virtual environment with Ubuntu+KVM.
It is the following constitution,
but it is lent IP (192.168.1.2) ubuntu02 by DHCPD, and the same IP seems to be lent to ubuntu03
router/dhcpd - ...
2
votes
2answers
2k views
Bridging Network Devices with Multiple IPs
I have a small server with a single NIC that I am trying to get a bridge functioning on so that I can run KVM. On this NIC I have a couple IPs statically assigned to it:
eth0 = 192.168.1.1
eth0:1 = ...
2
votes
4answers
104 views
Differences between bridged and NAT networking
I don't fully understand the differences between NAT and a bridged connection over an virtual machine. As far as I've found, machines which are on the same network with our host machine can access our ...
2
votes
1answer
294 views
DHCP not working through long bridged network
I have setup a hotspot at my local harbor. I have encountered a problem with my setup. The accespoint that creates the hotspot connection is a out door long range antenna from UBNT. The distance from ...
2
votes
3answers
927 views
Same or separate subnets when connecting two buildings via a wireless bridge
We have two buildings about 200 feet apart connected via SMC's outdoor wireless bridge. Currently, both buildings are on the same subnet with one DHCP server in the main building. This seemed to be ...
2
votes
1answer
884 views
KVM second private network (bridged), how to get working?
this seems to be a hard problem. I would therefore be very thankfull for your advice. I spend two days trying to get this running, but with
no success. (The Public IP Stuff is working, but not the ...
2
votes
2answers
4k views
Linux bridge responding to arp on wrong interface?
I'm trying to build a silent bridge for monitoring purpose. My computer is running linux 2.6, brctl 1.4 and has 3 NIC:
eth0, with an assigned IP, used for SSH maintenance
eth1, and eth2 , the 2 ...
