Tagged Questions
0
votes
0answers
63 views
Routed libvirt/KVM network: response packets never reach guest
I'm desperately trying to get a routed networking up and running, but having extreme trouble with the setup.
My Dedicated Server has 2 public IP addresses in the same subnet. I want to use 1 IP for ...
1
vote
0answers
77 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 ...
0
votes
0answers
34 views
how to carp two interfaces on same node?
I have this CentOS machine with 2 interfaces.
eth0--> br0 (.10)
eth1--> br1 (.11)
Although part of the same network, each interface is being fed from a different switch. I use each bridge in ...
0
votes
1answer
72 views
KVM guest can't find gateway
I try to setup a KVM server with bridged networking. I followed the docs, but still can't get it working. The guest system can ping the host system and the host the guest system, so the connection ...
1
vote
1answer
73 views
Changing Linux Layer2 forwarding decision?
Are there tools to define in Linux something similar to Policy-based Routing, but on Layer2 level? Usual Linux bridge uses destination MAC to decide, which interface to send frame to. Can this ...
0
votes
1answer
80 views
KVM guest has a wrong outgoing ip address
I have a KVM host with a bridge configured on eth0 that has a public ip:
auto br0
iface br0 inet static
address xx.xx.aa.111
netmask 255.255.255.0
network xx.xx.aa.0
broadcast xx.xx.aa.255
...
2
votes
1answer
169 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 ...
8
votes
2answers
626 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: ...
1
vote
1answer
480 views
KVM is NOT seeing multiple bridges (only macvtap devices)
I am in the process of doing some thesis research about using ebtables and iptables on a KVM host to perform on-the-fly firewall restrictions to KVM guest VM's.
Here is the problem:
I have a bridge ...
0
votes
1answer
674 views
Use one NIC to create multiple interfaces for Linux KVM
I am working on a thesis research project, and I am having some difficulty figuring out how to make one NIC spawn several "bridge" interfaces such that each KVM VM can be seen on the local network. I ...
0
votes
0answers
67 views
Why do peers at a bridge stop replying to ARPs after massive rsync traffic?
Ok, this is a weird problem I had when pushing data to my server. I shall explain the surroundings a bit, as I'm entirely unsure where the problem can be (I hope this is not off topic, but it ...
0
votes
1answer
294 views
KVM with external IP without NAT?
I have a CentOS 6.3 server with 1 NIC (eth0) and an external IP (lets say 1.2.3.4). On this server I'm running a CentOS 5.6 KVM with the "default settings" (virbr0 on 192.168.122.x).
What I want to ...
1
vote
1answer
871 views
Centos/OVH: public IP on KVM virtual machine
Since a few days, I'm trying to configure my KVM vm to have a public IP address, without any success.
First, I'm on OVH, and you need to know they don't allow networking from different mac addresses. ...
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 ...
0
votes
2answers
159 views
Ubuntu with KVM guest VM and broken bridges
I have an Ubuntu box with a KVM guest VM running. They use bridging so the guest VM attaches to the physical network of its host. The guest VM has 2 NICs in 2 different bridges.
First NIC of the VM ...
0
votes
0answers
288 views
Two servers on the same network can't ping eachother
According to this guide I setup two servers.
Now these two servers can't ping each other, this is arp -n result:
# arp -n
Address HWtype HWaddress Flags Mask ...
2
votes
1answer
359 views
IP Bridge for KVM with multiple subnets
I have a machine set up running KVM and a bridge on eth0 with the ip address for the machine. The machine has an IP address in a range with no more ip adresses free. I am trying to make a second ...
1
vote
1answer
154 views
Multiple IPs on eth0, bridging to VMs and routing
Current situation:
I have a host running 3 virtual machines. One IP for eth0 (xxx.xxx.xxx.239) and one additional for eth0:1 (yyy.yyy.yyy.35). This works fine for me...
Host (eth0) (xxx.xxx.xxx.239) ...
0
votes
2answers
2k views
How to bridge a range of public IPs to KVM virtual machines on Debian/Ubuntu
I've been trying for weeks to figure out the right network configurtion for sharing a range of public IPs with KVM virtual machines running on my server, but so far with little luck and with the help ...
1
vote
0answers
187 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 ...
1
vote
2answers
2k views
KVM/Libvirt bridged/routed networking not working on newer guest kernels
I have a dedicated server running Debian 6, with Libvirt (0.9.11.3) and Qemu-KVM (qemu-kvm-1.0+dfsg-11, Debian).
I am having a problem getting bridged/routed networking to work in KVM guests with ...
2
votes
1answer
500 views
NFS and KVM. Slow Speed
I have a KVM virtualization in Debian with 2 guests (Debian and Windows 2008). I want to have a 'mount point' shared that can be accessed by the 3 system (host and 2 guests) at the same time. So the ...
3
votes
1answer
571 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 ...
1
vote
3answers
714 views
Is there a way to determine which virtual interface belongs to a virtual machine in a kvm host?
I'm using qemu/kvm whith bridged networking. In the host machine there are several "vnetX" network interfaces without IP. I'm looking for a way to know which vnetX belong to a virtual machine.
I ...
2
votes
3answers
944 views
KVM-Guests can't get past bridge - no internet connection
I'm running a backported KVM on a Debian Squeeze. ATM the KVM-Guest can't connect to the internet through the bridge I have set up. The guests can reach each other, the host but nothing outside. I can ...
4
votes
2answers
756 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 ...
0
votes
0answers
360 views
Install KVM on VPS how to configure network bridge
I want to install KVM on my VPS server, but I don't know much about setting up network bridges unter Linux (Debian Squeeze).
In /etc/network/interfaces I have no eth0 controller, there is only
# ...
1
vote
1answer
855 views
KVM VMs and virtual network, how to assign external IP addresses?
So, my question is: there is a remote server on Red-Hat with an external IP-address, eth0: inet addr: 87.112.140.53 Bcast: 87.112.140.255 Mask: 255.255.252.0, and is a virtual interface, which raises ...
0
votes
1answer
163 views
configuration of bridge to send traffic to external switch
I created 3 VM on top of KVM/QEMU (RHEL 6.0) using bridged networking. Created one bridge for eth1 and all the VM's are using that bridge for networking. All these VM's have the same subnet address. ...
1
vote
1answer
281 views
Opennebula KVM onevnet
I am experimenting with Open Nebula and KVM and so far I have a frontend and a few hosts (all hosts have two NICs for redundancy).
I know that KVM makes on the hosts a virtual interface virbr0.
...
0
votes
1answer
1k views
Linux storing arp cache entries using wrong interface
I'm trying to get two virtual machines (running CentOS) to talk to host (Ubuntu 10.04) using VDE and the outside network.
So far I'm running into an ARP issue.
On Host I have a physical eth0 and a ...
0
votes
3answers
884 views
KVM bridging for virtual machines not working?
I'm currently setting up a KVM with several VM guests. I created the first one but I ran into the first problem already:
root@vm1:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From ...
4
votes
1answer
689 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?
0
votes
1answer
558 views
Add Two Bridged Interfaces on Ubuntu for KVM
I have ran the following;
sudo /usr/sbin/brctl addbr br0
sudo /usr/sbin/brctl addif br0 eth0
And added the following to /etc/network/interfaces;
auto br0 # for XPProxx86 KVM
iface br0 inet dhcp
...
2
votes
1answer
870 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 ...
0
votes
1answer
612 views
KVM guests lose connectivity after networking restart
we're setting up an ubuntu server 10.04 host with kvm. The host is setup with a bond and bridged interfaces to allow the guests access to the network without natting.
Our current configuration is ...
2
votes
1answer
699 views
Centos KVM Host OS not passing all network traffic Guest OS
I'm running KVM on Centos 5. I have a guest OS, ubuntu 10.04, that has Snort 2.9 installed on it. The guest OS has (2) nic's, eth0 and eth1. One nic, eth0, is configured with an IP and can be ...
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 ...
2
votes
1answer
230 views
Can ufw on a kvm host restrict traffic to guests?
I've set up a number of guests running on kvm on Ubuntu. Network access for the guests is via network bridge with br0 sitting on top of eth0. I have ufw running on the host machine and this is ...
0
votes
0answers
452 views
KVM network in bridge mode with PPPoE
I had successfully installed KVM in Gentoo , and set network in bridge mode as the document described (direct bridging , not NAT). Now my guest and host OS can connect each other via ping , ssh and ...
1
vote
2answers
1k views
Random temporary network freeze on kvm guest machines
I'm running two guest machines under KVM. The host is running Arch Linux (kernel version 2.6.38.2), the guests are both CentOS 5.5 (kernel version 2.6.18). I have the networking set up as a bridge, ...
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 ...
2
votes
1answer
2k views
kvm Bridge issue - no network to guest
I currently have a Proxmox (debian) KVM host running multiple OpenVZ Containers for general usage,
I am looking at creating a KVM VM however I'm unable to get networking to work for the CentOS KVM ...
0
votes
2answers
691 views
Linux KVM virtual machine and UDP transferts
I've got a setup where a windows 2008R2 VM runs under KVM on a bridged network and captures a lot of multicast UDP data (from videosurveillance cameras). Strangely, the VM network drops packets after ...
0
votes
1answer
185 views
KVM wireless bridged networking mode not operational
Why does KVM not support wireless bridge networking mode, whereas VirtualBox and do it very well? parprouted doesn't help.
I want to allow KVM guests to act as if they have a bridged network ...
0
votes
1answer
466 views
Losing unicast traffic with “Input DA reject”
I have a rather complicated issue with an old Cisco 5509 Switch and a few kvm/qemu based virtual machines. First, the setup of the system looks like this:
...
2
votes
1answer
454 views
Configure iptables with a bridge and static IPs
I have my server set up with several public IP addresses, with a network configuration as follows (with example IPs):
eth0
\- br0 - 1.1.1.2
|- [VM 1's eth0]
| |- 1.1.1.3
| \- ...
1
vote
2answers
3k views
ubuntu 10.04; kvm bridged networking not working with public ip addresses
I have a dedicated hosted server box with ubuntu 10.04 64 bit installed. I would like to run kvm with ubuntu 8.04 installed for some php 5.2 compatible apps(they don't work right with php 5.3, the ...
0
votes
2answers
856 views
Hanging of host network connections when starting KVM guest on bridge
I've a KVM system upon which I'm running a network bridge directly between all VM's and a bond0 (eth0, eth1) on the host OS. As such, all machines are presented on the same subnet, available outside ...
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 ...
