Questions tagged [bridge]
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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Enabling bridged connections with a single network card with multiple IP addresses
I have a server with one network card in it (eth1). My server is assigned 5 public IP addresses and it is currently configured like this (/etc/network/interfaces):
# The primary network interface
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Can a single physical interface act as a “slave” for multiple bridge interfaces?
Can a single physical interface act as “slave” for multiple bridge interfaces? For example, br0 and br1 would use eno1 physical.
Got KVM host with 4 physical nics, each nic assigned to a different ...
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Network bridging - what's the point?
I'm having hard time trying to understand how bridges work. What's the idea behind them? Most sources say their main role as connecting two LANs. They are layer two devices. But wait a second, how can ...
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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).
https://i.stack.imgur.com/KDUgi.jpg
So on ...
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ubuntu route all client eth0 traffic to openvpn on client tun0
OpenVPN client has 2 physical interfaces:
eth0 = 192.168.10.14/24 gw 192.168.10.1
eth1 = 192.168.10.17/24 gw 192.168.10.1
tun0 = 172.160.1.6/24 gw 172.16.1.5
Server is external somewhere listening ...
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How can I block all traffic to/from an bridged interface while allowing DHCP?
I have a PC (running Fedora 20) that is being used as a "software switch" to control the network connectivity of some external devices. There are eight such devices; the PC has two 4-port Ethernet ...
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how to make this bridge to work?
I have posted a similar question at: https://stackoverflow.com/questions/27873819/customising-docker-network-doesnt-work#
To simplify the question, let me get rid of docker.
This is the network ...
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Bridge configuration on OpenVZ
I have been using an OpenVZ environment left behind by a previous employee. A while ago I needed to use virtual eth devices to try a specific application.
After removing VETH might have misconfigured ...
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Bridge behavior when MAC address is not found
Lets say, a uni-cast packet is sent from one system to another system. The packet passes goes to the bridge. But the bridge does not have any information about the MAC address of the destination.
What ...
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NIC bonding over bridged GRE-TAP: not getting replies... unless I run "tcpdump"?
I'm trying to get Linux bonding working over a VPN (GRE-TAP). The funny thing is, that it only works when I have tcpdump running on both hosts, but more on that later...
There are two machines, ...
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Proxmox with an Openvswitch bridge
All,
I'm trying create a way for me to be able to use the local network within my Proxmox infrastructure.
Currently, everything is running off of NAT from wlan0 and all internal machines have the ...
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Linux bridge not answering arp packets
I'm trying to setup a test scenario regarding linux bridges for which I need a full virtual IP stack. Basically, I'd like to simulate the network between a VM (or container) and its host, just without ...
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Filter mirrored port traffic using iptables
I receive traffic from a mirrored port and I would like to send it into an NFQUEUE for processing. Because of the mirrored port, the packets destination MAC addresses are not my host MAC address. ...
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Dummynet Filtering not working on FreeBSD 10
I am trying to do network emulation using dummynet in FreeBSD 10. I have this working in 9.3 however things must have changed and I cant determine exactly what but my setup no longer works. I have ...
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Equivalent to TYPE=“OVSPort” DEVICETYPE=“ovs” OVS_BRIDGE=br-ex in Ubuntu 14.04?
Is there an equivalent to TYPE="OVSPort" DEVICETYPE="ovs" OVS_BRIDGE=br-ex in Ubuntu 14.04?
The system is OpenStack Icehouse with 3 nodes (controller, network, compute1) each on a VirtualBox Ubuntu ...
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can't ssh into KVM VM despite using bridged network
I'm trying to access a KVM virtual machine running inside my company's network. I am VPN'ed into the network from my laptop and can ssh into other VMs, and I set up my VM to use a bridged network for ...
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Blindly bridging wireless client with MAC NAT
This is the usual "I want to bridge wifi with ethernet" question, but I need something specific here.
My Linux box has a wlan0 interface which is in station mode, with MAC aa:aa:aa:aa:aa:aa, and a ...
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qemu, kvm: Guest: No DHCPOFFERS received
I'm trying to set up a virtual machine (guest) wich should act as router (ubntu 14.04). The host is a CentOS 7 machine (4x LAN). The guest should get a public ip address over it's eth0 (guest), wich ...
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Sniffing packets coming out of "tap interface" when bridge connects to vlan tagged interface
So, I've a tap interface that's created by kvm which belongs to a VM being managed via libvirt.
The bridge consists of eth0.123 (here eth0.123 is a vlan tagged interface) & the tap device.
[...
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Debian Bridge Network Connection -- Static IP Addresses
I have a PC with 3 Ethernet ports. I am able to share internet to the other two ports with internet coming in on eth1. I use the following setup on /etc/network/interfaces after aptitude bridge-utils ...
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why linux bridge shows 2 mac addresses for one qemu vm?
I am new to qemu networking and pretty confused about the following situation. I launched 5 VMs. Each connects to br0 through a tap device. I also have a dnsmasq listening on br0 for DHCP.
The ...
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High packet loss with kvm, bridge and bonding
I have 2 servers connected through cisco linksys sg500. Both hosts have identical configuration (Ubuntu 14.04 LTS, 4 * 1Gb/s network interfaces with bonding).
When I set up bridge and interface ...
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bridging LXC containers to host network with different IP range
I'm pretty new to linux, and I have been struggling with a problem for the past week or so...
I am trying to setup a cluster of LXC containers on a workstation (host) which is has IP 192.168.10.33 ...
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Can't access KVM Host (network brige)
I have a strange problem since I rebooted my KVM Host running CentOS 7.
I have a network bridge which was going fine, I could access my KVM hosts and guests, but since reboot, I can't access the Host....
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Linux - Disable routing but allow bridging
I have a Linux server that is running the KVM hypervisor. I have multiple bridges on this server (that are on different VLANS).
Is there an "easy" way to make sure that bridge hoping (i.e. routing ...
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CentOS 6.5 Bridged Networking Fails
I have a CentOS 6.5 Server that I wish to host VPS on, as well as installing SolusVM, to do this I need to bridge the network adapters for the Server and the VM's ( so the VM's can connect to the ...
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how to connect/bridge two interfaces on different processes
I have two processes A and B (simulating real hardware device), each with their own TAP interfaces. If I want to send an ethernet packet to A, I send it on interfaceA, and similarly if I want to send ...
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Bridge PPTP VPN with local network
I have configured on my Ubuntu a VPN server using PPTPD. I can connect to it from outside of my LAN, I can use it's internet connection. But I cannot see my LAN clients (because the VPN and the LAN ...
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Guest networking not working on Debian Jessie Host server KVM with br0 bridged network
GUESTS networking not working at all. In other words guest can not ping host or lan gateway.
I have br0 bridge already created, also brctl show that vnet0 was properly added by KVM to br0 on guest ...
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Debian don't forward through L2TPv3 more than mtu l2tp virtual interface
R3--R1--Internet--R90
R3: ip addr 10.123.0.3
R1:
sudo ip l2tp add tunnel tunnel_id 699 peer_tunnel_id 699 encap udp local 5.254.174.8
remote 5.254.174.90 udp_sport 699 udp_dport 699
sudo ip l2tp add ...
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How should I bridge two networks, given each network has its own subnet & DHCP server?
I would like to join/bridge two different networks, network 1 and network 2:
Network 1: A network consisted of a Linux box (with one ethernet) port and multiple clients (connected via LAN switch). ...
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Bridging multiple VLANs in linux
I'd like to clarify some issues I have with bridging tagged traffic on Linux machine.
I have a 2.6.20 (802.1q, bridging, ebtables are enabled) kernel and a device with two
net interfaces (eth0 and ...
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Azure Site-to-Site VPN with a Linux based router to bridge the VPN ports to a RRAS server while keeping NAT for other traffic
I am trying to get an Azure Site-to-Site VPN up and running using RRAS but require help configuring my router's iptables to bridge the VPN ports and protocols to the RRAS server without using NAT ...
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Can I use a server to employ link aggregation between 2 unmanaged switches [closed]
From everything I read, If I wish to use link aggregation between 2 switches, they need to be managed switches--specifically, they need to support 802.3d spec.
Now that I fully understand the ...
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KVM Bridge with external ip with windows server 2012 guest
I'm currently setting up a guest windows server with kvm/qemu on a unbuntu 14.04 host and a bridged network connection to allow the server to be exposed over the internet.
I'm trying to give my ...
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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 to ...
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Xen Vif creation xl vs xm
Hi everyone,
I switch my server from a xend/xm Xen install to a 4.1 xl Xen install.
Therefore Xen does not create vif network interface when I launch xl create /etc/xen/my_server.cfg but does create ...
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Can I create separate bridges for every lxc user?
I have successfully created unprivileged lxc containers for one user on a system. All of those containers use the default lxcbr0 bridge.
Now I want to allow other users on the system to create ...
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BROUTING's target "redirect" in ebtables behaving in a strange way
Situation
(host A)-------(bridge B)------(host C)
where:
A has MAC A on it's interface
C has MAC C on it's interface
B has MAC BA and MAC BC on it's two interfaces (depending on who it's facing)
B ...
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How does ssh work when client and host are on the same machine?
I illustrate my question with the help of docker containers but this example is orthogonal to the rest of the problem. In fact any program that allows the use of bridge interfaces and ssh would do.
I ...
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Bridge in Debian Linux (Wheezy) cannot access WAN hosts by name
I'm having the same problem as this poster:
bridging two network interfaces in ubuntu linux 12.10 AND being able to access it from that machine
and would be grateful for any help on how to debug it.
...
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Linux virtual bridge not transparent
I'm attempting to set up the Openstack tutorial demo using libvirt VMs on my desktop but I'm having some problems with the virtual bridge on the host desktop.
While debugging this, I noticed that the ...
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Launch an openstack instance with single NIC
I'm totally new to openstack and without much resources I built a cloud with my pc as controller containing a wifi for internet and ethernet for internal connection also with my laptop again with a ...
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Linux router share internet between eth2 to eth3 [closed]
I am not a networking guy, so apologies in advance.
I have a small Linux (Ubuntu) box with 2 ethernet ports.
eth2 is connected to a cable modem that gives it a 192.168.1.x address + internet ...
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CoreOS, Docker networking, more than one bridge?
I have a server with 4 ethernet-cards. With the switching hardware I put all 4 cards in different VLANs. With the default networking on CoreOS I get single bridge for the containers, with a private IP ...
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No IPv6 traffic in bridge mode
Hello happy people o/~
yesterday I had the audacity to reboot a remote Linux server.
This Ubuntu 64, 12.04 installation went from kernel 3.11.0-19-generic to 3.13.0-32-generic and also from being ...
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How can I bridge a VM to a remote network?
I have a system running QEMU/KVM (via libvirt). One of its VMs needs to have a presence on a subnet that is not local to the VM host. I have a Linux system on the remote subnet. Is there a way to ...
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Directed ARP requests do not arrive at bridge interface
I'm baffled by the following weird bridge/arp behavior under Linux. It somehow seems to filter directed ARP requests, whereas it should forward them to the other end of the bridge. To test, I run the ...
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xen project - bridged interface shows 2 MACs
I have a simple xen project 4.1 setup running on debian wheezy dom0. I have noticed during a network scan that a domU gateway returned 2 mac addresses for the same IP. One MAC being the expected, ...
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Linux bridging for KVM
I have a Debian Wheezy machine on which I tried to setup KVM with bridged networking. Unfortunately, the bridge does not appear to forward traffic correctly.
My setup is the following:
The physical ...
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