Networking :: VirtualBox Bridged Adapter + 8021q = [b]ridiculous Performance[/b]
Oct 15, 2010
I'm configuring a CentOS 5.5 2.6.18-194.17.1.el5.centos.plus server in order to have multiple VirtualMachines in it. The throughput of the machine is at least 300KBps (yes KB), I configured two web servers one on the virtual machine and the other in the physical machine, the difference was: 300bps-3 KBps on the virtual machine, 230KBps on the physical machine.
The configuration is as follows:
Code:
If I attach the public ip address to the virtual machine this gets smoothly.
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Jan 23, 2011
I virtualised backtrack on windows 7, and set up the network connection to bridged mode, but my networking still fails.
dhclient eth0, outputs many DHCPDISCOVER but no DHCP offers.
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Jun 8, 2010
I broke down and spent some $$ on a new server for home use. I mostly do technical research and testing, plus store movies and music. My interests are mainly in the IET iscsitarget performance.
Server system consists of an AMD Phenom II 550, 8GB RAM, 1x 80GB system partition, and a LVM-vg0 software raid5, running Ubuntu 10.04 server x64.
The vg0 consists of 3 x 500GB 7200RPM SATA drives (mdadm) sliced up with 100GB for VBox VMs, one slice is an iscsitarget for a Windows 2k3 server, and another slice iscsitarget for a desktop.
With this setup, the win2k3 server is booted from a .vdi image stored on the ext4 lvm raid5 vg0. Here are the DiskTT stats.
Code:
However, with the Win2k3 server and the MS iscsi initiator I get using DiskTT:
Code:
The speeds are incredibly slow considering a non iscsi connection is screaming fast in comparison. Any ideas?
All nics are 1GB.
Here is my ietd.conf
Code:
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Jan 7, 2010
I virtualized XP, and it's rather slow. I allocated 1.5 gb of ram, dynamically expanding storage. When I go to system in control panel, it says my processor is 880 mhz fast. I have an amd64 2.0 dual core.
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Feb 23, 2011
This has been an on going problem since 13.1 was released, but this morning was the last straw. I was printing off pages from a web site and it was taking, seemingly, forever. I finally started up VirtualBox and in that Xp, and went to the same web site and started printing one of the same pages. In Xp it printed in 1/4 of the time it took in Slack. The question is, Why? It is HP 940c and not a windows only printer. It is getting a bit ridiculous to have to run run Xp in a vm to do, with any speed and quality, basic things such as scanning, printing and using Bluetooth to communicate with my cell phone.
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Jun 4, 2010
My brother has a Ubuntu server attached to a LAN with Windows PCs. I set up an openVPN tun service on the server, let's call this VPN1, so that I can connect remotely from my Ubuntu desktop. The server has one NIC and the LAN has a router that is the gateway to the internet.
My brother would like to remotely access his windows network when roaming with his Windows laptop.
Therefore, I would like to set up a second VPN service, this time tap, that is bridged with his LAN. Let's call this VPN2.
The LAN subnet is 192.168.1.0/24. The internet gateway is 192.168.1.1
The NIC has a fixed IP set by the router of 192.168.1.150
How do I set up VPN2 so as not to trash VPN1? That is, if I bridge eth0 with tap0 how will that impact VPN1's tun0 that is using eth0? Do I need a separate NIC for the VPN2 bridge?
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Nov 24, 2010
I am trying to get a bridged connection to work in centos
Here is the network diagram [url]
There are two interfaces in linux system , they are bridged and connected to the windows system I am not sure if I need to enable STP in the bridge or not?
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Nov 20, 2010
I have two eth interfaces bridged in CentOS, one of these interface is connected to a Windows Server, I can do a ifconfig down on both these interfaces and there is no change of status at the windows side, I don't get the message that 'network cable has been unplugged'
Is this behavior normal ? I think when you shut an interface than you get the interface down message at other end ? And what becomes the status of the bridge if I shutdown one of its interface ?
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Aug 20, 2011
Newbie Question: How do I setup networking on openSuSE 11.4 on an HP Proliant DL385 G7 with 4 NICs to host Windows 2008 R2 on Xen? I've installed openSuSE 11.4 with all the patches (and most of the server patterns - Mail and News, LAMP, LDAP, Samba, etc.), and I've installed Windows 2008 R2 in a Xen virtual machine. I'm having problems configuring the 4 NICs eth0, eth1, eth2, eth3 are "bound" without an ip_address as br0
eth0 connects to my ISP - currently through a private LAN - It connects directly to the router with static IP 192.168.0.105 Eventually, one of the other NICs will serve ip_addresses via DHCP to a separate LAN (for use in an office setting), and eth0 will be set with a static IP from the ISP That means, eth0 will be static to the ISP, and the other NICs will attach to a switch serving private ip_addresses in the 192.168.0.xxx range.
Currently, I have br0 unconfigured and eth0 static. I have configured eth0 in the External Zone and br0 in the Internal Zone in the firewall, and all the correct ports are opened (afaik) I have enabled masquerading. Hostname, Domain (workgroup), DNS Server addresses and IPv4 Gateway are configured.
Windows 2008 R2 (Guest VM in Xen) "sees" the other machines on the network, and "browses" the internet, although it will not download patches except intermittently. I have not tried connecting to it from the LAN Eventually, I wish to run Windows Terminal Server. openSuSE cannot "browse" the internet, though it initially did. What am I missing? I "think" I need routing or NAT, or I may have my bridge setup incorrectly, although I've tried almost every combination. Google says Xen should be setup with either NAT or a Bridged Network.
Output of ifconfig:
br0 Link encap:Ethernet HWaddr 3C:4A:92:76:B8:F2
inet6 addr: fe80::3e4a:92ff:fe76:b8f2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:953 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:119849 (117.0 Kb) TX bytes:368 (368.0 b)
[Code].....
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Apr 22, 2010
how to configure a bridged connection in where we are required to enter username and password.I am currently using PPOE type connection of my modem(A Nokia siemens ADSL modem).
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Jun 5, 2011
Setup:
1. Microsoft Windows 7 64-bit Professional HOST Operating System
2. Oracle VirtualBox 4.0.6r71416 on top of Windows 7
3. Ubuntu 10.04 Lucid Lynx 32-bit GUEST Operating System in VirtualBox
I successfully installed the above configuration on May 15, 2011. I had some difficulty getting the Host-Only VirtualBox Adapter to work. I was forced to make a subtle change to the Windows Registry in order to get the Adapter to work correctly. I was successful. I used the Debian Update Manager to update my installation of Ubuntu. Nothing changed on the Windows 7 side. Now, Windows 7 says that the Host-only adapter is enabled, but I don't have a connection to the Ubuntu OS. I can't use PuTTY or WinSCP. When I invoke ipconfig on the Windows side, 192.168.56.101 is the IPv4 address. When I invoke ifconfig on the Ubuntu side, there isn't anything.
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Oct 1, 2010
I've got a Fedora 13 box running a bunch of VM's w/ bridged networking.
For some reason, every 10-15 minutes the vm's networking freezes and the vm's become unresponsive to pings and any other network traffic for 10-15 seconds. It eventually gets restored.
I don't see any error messages other than this occasionally on the host: eth0: received packet with own address as source address
Here's the two interface configs:
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May 28, 2010
Im using fedora 13 x64 install from DVD. Has anyone else found problems using vmware 7.0.1 or 7.1. My bridged networking will not pickup a dhcp address, and even if I configure static my network will still not work, yet NAT works fine. Even configuring bridged to use a dedicated device doesnt work. Workstation worked fine on Fedora 12 but this seems to be a reoccuring problem in every other release.
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Aug 7, 2010
Bridged successfully but cannot access the Internet.I installed VMware in my Fc13,and installed XP sp3 in the VMware.I can access the Internet in XP,I set the network as Bridged with Fc13,but Fc cannot open a page,but I ping google.com,it can display: Code: Pinging google.com [64.233.183.104] with 32 bytes of data:
then nothing.I still cannot access the Internet in my Fc13.
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Feb 1, 2011
I have been trying to set up bridged networking, but I keep failing. I am using Fedora 14 x86_64 KDE as host with qemu-kvm and SPICE. The plan is to install a windows server, a few windows clients and then rawhide as guests on that. Naturally I want to use bridged networking for the windows guests.[URL]..But those both leave the guest without internet access. Is it really this difficult, or am I doing it wrong(tm)?
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Mar 10, 2011
I currently have one of our clients set up to use a routed VPN for their 5 laptops to connect to the server remotley. And this works brilliantly. They are about to bring on a remote office that will need a VPN connection back to the main office, so I was going to set up a bridged connection between the two sites (and possibly more sites in the future).
So my question is whats the best way to go about this? Can I have one instance of OpenVPN running with tun0 set up for a routed connection to the laptops and add a second tun (tun1) to the config that will be for the bridged connection between the sites? Or am I going to have to run multiple instances of OpenVNP, one for the routed and another for the bridged?
If routed and bridged have to run in seperate instances, will I have to add another instance for each new remote site that needs a connection? Can a bridged config connect to multiple sites, or have multiple tuns in the one config?
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Jun 19, 2011
I've set up bridged networking so that I can have KVM virtual machines that are accessible from outside the host. I can access both the Host and my VM from other machines on the local network, and from the VM I can access the internet but from the Host I can only access my local network. Since I can access the local network and the same issue applies regardless of whether I use host names or IP addresses I suspect it's not picking up the gateway properly.
How do I go about allowing the VM host to access the internet while still having bridged networking so I can access my VMs?
What I've checked so far:
Ping Google DNS (8.8.8.8 )
From Host: Destination Host Unreachable
From VM: Suceeds
[Code].....
The issues are only with accessing things outside of my subnet. I can access other machines on the same subnet from the Host just fine.
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Aug 20, 2011
I'm having trouble getting Fedora 15 to work with my em/bond/br configuration as it did in Fedora 14. I've got a bonding interface over em1 and em2, and then individual bond vlans (bond0.2, bond0.10, etc...), I then have a similarly named bridge interface (br0.2, br0.10, etc...) for kvm. Regardless of if I assign bond0.2 or br0.2 the IP address, I am unable to ping the gateway, but the native untagged VLAN (bond0, br0) has no issue at all.
To try to isolate this issue down to the switch or Fedora 15, I went with a plain em setup and configured em1, and em1.2 which works as expected. This issue has been plaguing me since Fedora 15 came out and I'm about to trash it and go back to Fedora 14 (Which didn't have this issue), but some of the new kvm features have kept me trying to get over this incomprehensible hump.
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Jun 19, 2011
I have an Ubuntu 10.10 host running in VirtualBox 4.0.8 r71778, and I need to setup a LDAP authentication network between two VM's: a Maverick-based distro and Ubuntu Server 11.04.
Screenshot of the two running perfectly fine:
[URL]
Using NAT, I can have the two VM's up and running on VBox, but they get the same IP (10.0.2.15).So I googled it and quickly found out that I needed to change the VM's network interfaces to Bridged Networking. So I tried that. Here's two screenshots of the default configurations:
1- Ubuntu Maverick based distro:
[URL]
2- And here is one of the Ubuntu Server:
[URL]
(I'm Portuguese, that's why there are mixed languages in the UI)It's pretty stupid to explain like this, but whenever I try to start one of those two using Bridged Networking, I get a black screen full of errors (I can't take a printscreen of that, so I took a bunch of pictures - yeah, it's lame, I know ). Then, I have to press the power button to shut down my host, and restart the pc.Here they are:
[URL]
Where I think the problem is:
[URL]
My host is currently running Linux kernel 2.6.38-10.I have dkms, linux-header-generic and build-essentials installed (and the VB extension package too)And my host is a laptop, connecting to the internet using the router my ISP provided me.How can I solve this? Is this some kind of bug regarding 2.6.38-10 kernel?I don't have other pc's to test my LDAP authentication, so I needed the two VM's to have different IP's.
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Oct 27, 2010
I have a bridged network setup ifconfig -a gives following output
Code:
br0 Link encap:Ethernet HWaddr 00:26:b9:82:42:38
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::226:b9ff:fe82:4238/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:150779 errors:0 dropped:0 overruns:0 frame:0
[Code]...
3) What are these vmnet1,vmnet2,vmnet3,vmne4 which I see above. I used kvm and virt-manager to create a bridged setup.
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Mar 2, 2011
I have installed qemu/kvm and created a Bridged network connection which works just fine(Windows 7 VM won't work in NAT mode.)
But when I try to use NetworkManager it says that I have no network connection because the network isn't managed, (I set the settings in ifcfg-br0 and ifcfg-eth0 to be managed)
The real problem is that now I can't use my VPN connections (I have many) in NetworkManager.
Is there a way to have both of these pieces of functionality?
I am using FC14
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Feb 4, 2010
Im trying to setup multiple domU through the default bridge setup. I am able to access only one of them through the network at a time. If you ping one of the domU it works perfectly but you cannot ping any of the others until you stop pinging the one and even then it takes a bit before you can. Ive looked around for a while and seen similar problems but nothing ever seems quite the same. Im probably missing something really stupid. Or is this the way the bridge is supposed to behave? Do i need to use a routed virtual network?
[Code]....
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Jul 19, 2009
Just something that struck me while working on our virtual servers today.
I have bonded 3 NICs at the host in Ubuntu Server 8.04 LTS. They are using mode 0 for Round-robin. Point is to increase the speed/performance of all the servers, but mainly the fileserver. The fileserver is a virtual server running Ubuntu Server 8.04 LTS on VMware Server 2.0.
1) I noticed the NIC in the slave OS reported link speed as 1000 and Im unable to change it as the NIC (virtual one) doesnt support it. Does this not really matter, as the NIC doesnt exist, and it will run at higher speeds anyway? Or do I have to remove the bond on the host, bridge all 3 interfaces from the host to the slave OS, and then make a bond in the slave OS?
2) While at it, does mode 0 only increase performance on data being sent from the host or does it also increase the available incoming bandwidth?
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Jul 31, 2010
I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.
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Mar 10, 2011
Ubuntu V 10.10, vs Windows 2k server. Comparable hardware. From a XP workstation on the same gigabit switch. Share uses Samba.
I start a copy of a 2GB file from the workstation to my Linux share, and then to my W2k server. The copy to the w2k machine finishes in less than 60 seconds, the copy to my Linux machine takes 4 minutes. I am a windows veteran, but a Linux newbie. Are there settings I should look at, or something faster than Samba?
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Aug 3, 2010
Ok, so I am needing some drivers and I've been googling like hell to find em, however, I can never seem to find any. My adapter model is F6D6050v1.
PS: when I try sudo ndisgtk it comes up with command not found.
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Dec 26, 2009
I have fedora 12 and since I started using firefox I noticed that it performs very slow. Slow when opening, when displaying information etc..I thought that there was something wrong with my wireless device but I installed opera and it works very fast. The strange thing is that before that I installed google chrome and also worked very slow for me.
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Sep 3, 2010
My DSL is working and my computer is on line but I would like to optimize my connection for better speed. I found a utility for this at speedguide.net but it was written for Windows.
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Aug 1, 2011
I have a WinXP virtual box and have setup a Samba server to have it use directly a couple of directories on the Linux side. The Samba performance is definitely better than the built-in shared folders of the virtualbox, but there is nothing to write home about either: transfer seem to top at around 3Mbyte/sec.
The machine is a laptop (Core i5 CPU (M520@2.40GHz) and a 7200RPM HDD) running Kubuntu 10.04.The Samba share uses a dedicated "host-only" network adapter. There is an iptable-based firewall to which i added the required 4 statements to let the Netbios traffic go through (without them nothing works...)So, given the hardware, are the 3MB/s a decent figure? And if not, what should I aceeive, and where can I look improve on the current numbers?
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May 29, 2011
I am enabling GSO via setting dev->features |= NETIF_F_GSO;I am observing that after I enable GSO my FTP get performance reduces.setup:ftp client running on a PC (IPv4 mode)connected across Ethernet interface.Any thought on the possible issues. Note: IPv6 is enabled. System running ftp server is in running 2.6.28 Linux.
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