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• Virtual NIC on VM couldn't ping externally after Vmotion

  - by ToreTrygg

  Today I vmotioned 5 MS SQL 2005 servers over to a new DRS Cluster. All SQL servers use the "Production_LAN" network and a single virtual NIC of type "VMXNET 3". The first 4 SQL VM (Windows 2003 Standard or Enterprise x32 bit) vmotioned over without a hitch. The last SQL VM I vmotioned (Windows 2003 Standard x64 bit R2) vmotioned over without error, but I upon completion, I could no longer ping the VM. I went into the VM and could not even ping the gateway, however I could ping the loopback. This SQL server is extremely busy in comparison with the previous 4 VM's. I restarted the server and it came back up with the virtual nic working just fine. The build of both servers (vmotioner and vmotionee) is ESX 4.0.0 175625 - So, pre-update 1. Should I suspect the network switch/VM for possibly not updating the mac table on the switch? Anybody else ever have this issue or know what may have caused it? Thank you!

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• CPU load, USB connection vs. NIC

  - by T.J. Crowder

  In general, and understanding the answer may vary by manufacturer and model (and driver, and...), in consumer-grade workstations with integrated NICs, does the NIC rely on the CPU for a lot of help (as is typically the case with a USB controller, for instance), or is it fairly intelligent and capable on its own (like, say, the typical Firewire controller)? Or is the question too general to answer? (If it matters, you can assume Linux.) Background: I'm looking at connecting a device (digital television capture) that will be delivering ~20-50 Mbit/sec of data to a somewhat under-powered workstation. I can get a USB 2 High-speed device, or a network-attached device, and am interested in avoiding impacting the CPU where possible. Obviously, if it's a 100Mbit NIC, that's roughly half its theoretical inbound bandwidth, whereas it's only roughly a tenth of the 480 Mbit/second the USB 2 "High Speed" interface. But if the latter requires a lot of CPU support and the former doesn't...

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• NIC: Changing Link Speed & Duplex to Full Duplex Is Drastically Slower

  - by rism

  I have an old Win Xp box with a 100 PRO/100 VE NIC and connecting to a Win 7 box with gigabit NIC via an ASUS gigabit router and peer to peer. I was getting 76% network utilisation on the XP machine using AUTO as the value for Link Speed and Duplex which is fine. But I decided to see what would happen if i selected Full Duplex 100Mbps on the XP box. I thought at worst it would be as good as auto detect since the Win 7 box it's transferring to is faster. Instead network utilisation dropped to 0.12% (as in a 10th of a percent) and the transfers just timed out. No biggie to reverse back to Auto but my question is why is full duplex such a dog? Im not "stuck" but just dont understand. There are only 2 machines here connecting through a router so i cant see how that would cause alot of collisions etc (if thats the problem).

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• Missing Jumbo and MTU for Broadcom NIC?

  - by Mike

  I have two Broadcom BCM5708C NetXtreme II GigE NICs in my Dell Windows SBS 2008 server. I would like make one them them Jumbo Frames enabled so that I can add it to my SAN whose VLAN on the switch is already using 9000 MTU. Broadcom's own data sheet for this NIC claims that it is Jumbo Frame capable up to a 9000 MTU. The problem is that there is no setting for Jumbo or MTU in the NIC's configurable settings. There are other settings but just not the one I need to change. Am I missing something here? The driver claims to be up-to-date when I allow Windows to search on-line.

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• Failover NIC with Windows 7 running Apache Server

  - by Benjamin Jones

  I have a Apache Server running on a Windows 7 Desktop for a internal website (Intranet). I am trying to figure out how I can make this system as failover safe as possible. One thing I want to do is use the 2nd NIC card that is currently disable. I only have one gateway address to my router. I do not have any computer running a Server O/S. If NIC1 crashes by chance(just humor me!), how could NIC2's IP take on the host name (I have mapped in host file) . I don't really care if the static IP of NIC2 changes seeing that the host name is the only thing I need. Could I add two IP's to the host file, with same host email and maybe create some script that will run IF NIC 1 fails? OR is there any failover software that will do this for me?

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• vmdk to live cd - VMware vmxnet virtual NIC driver Kernel panic

  - by ronalchn

  Task I am trying to convert a virtual machine to a live CD. Specifically, the virtual machine I am trying to convert is the IOI 2013 Competition Environment. In this task, I am aided by a guide Converting a virtual disk image: VDI or VMDK to an ISO you can distribute. Symptoms However, after getting through all the instructions, the live CD causes a kernel panic on boot on bare metal. In particular, the screen shows: [0.737348] cdrom: Uniform CD-ROM driver Revision: 3.20 [0.737503] sr 3:0:0:0: >Attached scsi CD-ROM sr0 [0.737638] sr 3:0:0:0: >Attached scsi generic sg2 type 5 [0.737771] Freeing unused kernel memory: 756k freed [0.738093] Write protecting the kernel text: 5960k [0.738155] Write protecting the kernel read-only data: 2424k [0.738224] NX-protecting the kernel data: 4280k Loading, please wait... [0.752252] udevd[100]: starting version 175 [0.768708] VMware vmxnet3 virtual NIC driver - version 1.1.29.0-k-NAPI [0.781204] VMware PVSCSI driver - version 1.0.2.0-k [0.789555] VMware vmxnet virtual NIC driver [0.799356] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000200 [0.799356] [0.799472] Pid: 1, comm: init Tainted: G 0 3.5.0-17-generic #28-Ubuntu [0.799549] Call Trace: [0.799603] [<c15bf0ec>] panic+0x81/0x17b [0.799654] [<c104a6a5>] do_exit+0x745/0x7a0 [0.799707] [<c104a9a4>] do_group_exit+0x34/0xa0 [0.799760] [<c104aa28>] sys_exit_group+0x18/0x20 [0.799813] [<c15cff5f>] sysenter_do_call+0x12/0x28 Possible problem I suspect that the problem is the VMware vmxnet virtual NIC driver - however, I do not know how I can uninstall it, and possibly install one for a bare metal machine. If anyone knows which packages needs installing/uninstalling at the .rootfs/ chroot directory stage, please let me know. Details on procedure Do note that after importing the .ova file into Virtualbox, the virtual machine is stored as a .vmdk file already, and not a .vdi file. I would like to point out some results of the procedure followed in case of any questions. This is after extracting the filesystem from the .raw file to the .rootfs/ directory mentioned in the blog. I changed the filesystem table as mentioned in the blog, then looked at the possible "kernel optimized for virtualization". However, I found that linux-image-generic was already installed. Also, when running the command dpkg-query --showformat='${Package}\n' -W 'vmware-tools*' (or dpkg-query --showformat='${Package}\n' -W '*-virtual'), no packages were found. Thus, I did not find any virtualization specific packages. I proceeded to generate the iso following the steps in the blog, and burned it to a DVD.

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• Hyper-V with a single host NIC

  - by Cylindric

  I'm trying to create a simple Hyper-V test machine, and am having more problems than expected with the basic networking. All other hypervisors I've used (vmware server, vmware player, virtualbox) allow me to use the default single NIC in my machine, and then create guests with "bridged" mode so they appear like a normal machine on the network. With the Hyper-V server, when I create a Virtual Switch and set it to "external", I lose all network access from the host. The solutions I've seen online seem to rely on complex configurations requiring multiple vSwitches and RRAS on the host to get it going. Is it really that complex to get a simple, single-NIC Hyper-V server going, in such a way that I can still use the host? The host is Windows 8.

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• Graph representation in Dr Scheme

  - by John Retallack

  I want to represent a graph in Dr. Scheme in the following manner: For each node I want to store it's value and a list of adjacent nodes,the problem which i'm having difficulties with is that I want the adjacent nodes to be stored as references to other nodes. For example: I want node ny to be stored as („NY“ (l p)) where l and p are adjacent nodes,and not as („NY“ („London“ „Paris“)).

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• Multiple IPs on firewall, are these virtual interfaces or what?

  - by Jakobud

  We have 5 static IP addresses from our ISP: XXX.XXX.XXX.180 XXX.XXX.XXX.181 XXX.XXX.XXX.182 XXX.XXX.XXX.183 XXX.XXX.XXX.184 On our firewall box, the NIC that is connected to our cable modem, appears to have all 5 IP addresses set on it. A previous IT guy set this thing up, and I'm not sure exactly what he did. Are these virtual interfaces on this NIC or what? Here is my ip addr output for that NIC: rwd0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether XX:XX:XX:XX:XX:XX brd ff:ff:ff:ff:ff:ff inet XXX.XXX.XXX.180/24 brd XXX.XXX.XXX.186 scope global rwd0 inet XXX.XXX.XXX.181/29 brd XXX.XXX.XXX.186 scope global rwd0:FWB9 inet XXX.XXX.XXX.182/29 brd XXX.XXX.XXX.186 scope global secondary rwd0:FWB10 inet XXX.XXX.XXX.183/29 brd XXX.XXX.XXX.186 scope global secondary rwd0:FWB11 inet XXX.XXX.XXX.184/29 brd XXX.XXX.XXX.186 scope global secondary rwd0:FWB12 inet6 fe80::250:8bff:fe61:5734/64 scope link valid_lft forever preferred_lft forever I'm a bit new to firewalls and networking so I'm just trying to figure out what he had going on here. I know he used Firewall Builder to configure the iptables rules, maybe that has something to do with the "FWB" I see in those names? So my questions are: What is going on here? Virtual Interfaces? Or something else? If we want to put in a second firewall in parallel with this firewall but we only want it to handle traffic to XXX.XXX.XXX.182, how do we get rid of the static XXX.XXX.XXX.182 address on this existing firewall box?

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• One Comcast Business Gateway, One Router, Two Web Servers

  - by Kevin Scheidt

  I have a Comcast business account with a router and a web server (info) attached. behind the router there are multiple computers and a second web server (info) which also serves as a file server. (info) has two nics in it. One direct to comcast and one connected to the router. It needs to serve the world it's websites. It needs however, to also be able to see all the internal computers and (com)'s served files. With just 1 nic (the one connected to the router, not comcast), (info) works fine but no one outside can see it. (com) services port 80 and (info) needs to handle port 80 as well. I have two domain names registered, and 5 static ip's from comcast. right now h t t p: / /www.graceamazing.com handled by (com) works fine and h t t p: / /www.graceamazing.com:1307 handled by (info) works fine. but as soon as I enable the 2nd nic in (info) h t t p: / /www.graceamazing.info runs extremely slow (Horribly slow). however, h t t p: / /www.graceamazing.com:1307 and .com work fine. (com) has an ip address via the router 70.89.233.41 (info) has a ip addy of 70.89.233.46 via comcast (2nd nic) and a internal ip of 192.168.x.100 via static behind the router. Any suggestions or changes to make that will make h t t p: / /www.graceamazing.info perform with the same speed it has when going through h t t p: / /graceamazing.com:1307 is there a setting I should check / could have misssed?

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• Windows Server 2008 R2 Virtual Network Setup

  - by jpearl01

  Hi all, Some background: I'm very much new to networking in general, and virtualization in particular. I'm trying to set up a series of VMs as we are transitioning to a thin client setup. I have been supplied a limited number of static ip addresses. The server is located in an offsite building which houses the network we use to connect to the internet, share folders etc. The setup I've been trying to go for is this: The host OS (Windows Server 2008 R2) is bound to one nic using one of the static ips (say, Nic1 and ip 10.255.6.61). I've set up another external virtual network attached to another physical nic , and a virtual private network attached to no nic. There is one VM running the same os (as the host). This VM is connected to both the external virtual network (and uses another static ip say Nic2 and ip 10.255.6.62) and also to the virtual private network (I gave it a static random ip 192.168.88.1 subnet mask 255.255.255.0). This virtual private network is connected to all the other VMs. I'd like to share the internet connection with all the other VMs on the private virtual network, and so I installed the RRAS role on the server connected to Nic2, and selected the option to share the internet over the vpn. I've run through the RRAS wizard a few times, trying different configurations, but none of them seem to be letting the other vms connect to the 'net. The vms seem to connect to the virtual private network fine, they are assigned an ip address and everything, but no internet, and no rest of the network either. The other problem is in general I connect to the vms with RDP. Will that be possible with a setup like this? i.e. will the vms show up as computers on the network? If not, what are my other options? Thanks! ~josh

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• Windows Server 2008 R2 Virtual Network Setup

  - by jpearl01

  Some background: I'm very much new to networking in general, and virtualization in particular. I'm trying to set up a series of VMs as we are transitioning to a thin client setup. I have been supplied a limited number of static ip addresses. The server is located in an offsite building which houses the network we use to connect to the internet, share folders etc. The setup I've been trying to go for is this: The host OS (Windows Server 2008 R2) is bound to one nic using one of the static ips (say, Nic1 and ip 10.255.6.61). I've set up another external virtual network attached to another physical nic , and a virtual private network attached to no nic. There is one VM running the same os (as the host). This VM is connected to both the external virtual network (and uses another static ip say Nic2 and ip 10.255.6.62) and also to the virtual private network (I gave it a static random ip 192.168.88.1 subnet mask 255.255.255.0). This virtual private network is connected to all the other VMs. I'd like to share the internet connection with all the other VMs on the private virtual network, and so I installed the RRAS role on the server connected to Nic2, and selected the option to share the internet over the vpn. I've run through the RRAS wizard a few times, trying different configurations, but none of them seem to be letting the other vms connect to the 'net. The vms seem to connect to the virtual private network fine, they are assigned an ip address and everything, but no internet, and no rest of the network either. The other problem is in general I connect to the vms with RDP. Will that be possible with a setup like this? i.e. will the vms show up as computers on the network? If not, what are my other options? Thanks! ~josh

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• How to install (old) packages for Ubuntu 9.04?

  - by wchrisjohnson

  Based on some excellent feedback by Mark here (http://serverfault.com/questions/285598/should-i-clone-a-physical-server-to-create-a-vm-for-a-staging-server), today I was able to use the vmware converter to clone my production server for a staging server. However the nic won't come up no matter what I do. I attempted to inistall vmware tools, as I suspect that the fact that it is not installed might prevent the nic from working. (I have the nic set as a vmxnet3 card in the vm settings). The install failed because there were several dependencies missing as well as the Linux headers. Given that Ubuntu 9.04 has been EOL'd, the packages I need to install to get the vmware tools to install are no longer available. I doubt the ubuntu 9.04 install CD has the packages on it. What are my options? I'd rather not upgrade the version of Ubuntu yet, as the point of the vm right now is to maintain parity with the production server. Might I have better luck resetting the driver to use vmxnet2 instead of the vmxnet3? Thanks in advance! Chris

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• Set up two IP addresses with one gateway?

  - by Ahmed

  I would like to ask if it is possible to set up two static IPs from same subnet through one gateway? and How if it is? What I am interested in is described here Routing for multiple uplinks/providers, but in my case I have two IP addresses from one provider, both are on same subnet and off course I have internet access on both. I have two NICs, but I don't mind to go with one if that makes it possible. Any thought is appreciated!

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• Windows 2003 Domain Controller Very Upset about NIC Teaming

  - by Kyle Brandt

  I set up BACS (Broadcom Teaming) to team two NIC on a Windows 2003 Active Directory Domain Controller. Networking still works okay, I can ping the gateway etc, but both DNS and Active Directory fail to start with various 40xx errors. The team that I created is Smart load Balancing with Failover, with one backup and only one in smart load balancing (So really it is just failover). I have the team the same IP address that the single active NIC had before. Anyone seen this before, or have any ideas what the problem might be? Event Type: Error Event Source: DNS Event Category: None Event ID: 4015 Date: 3/7/2010 Time: 10:33:03 AM User: N/A Computer: ADC Description: The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is "". The event data contains the error. Event Type: Error Event Source: DNS Event Category: None Event ID: 4004 Date: 3/7/2010 Time: 10:33:03 AM User: N/A Computer: ADC Description: The DNS server was unable to complete directory service enumeration of zone .. This DNS server is configured to use information obtained from Active Directory for this zone and is unable to load the zone without it. Check that the Active Directory is functioning properly and repeat enumeration of the zone. The extended error debug information (which may be empty) is "". The event data contains the error. Event Type: Error Event Source: NTDS Replication Event Category: DS RPC Client Event ID: 2087 Date: 3/7/2010 Time: 10:40:28 AM User: NT AUTHORITY\ANONYMOUS LOGON Computer: ADC Description: Active Directory could not resolve the following DNS host name of the source domain controller to an IP address. This error prevents additions, deletions and changes in Active Directory from replicating between one or more domain controllers in the forest. Security groups, group policy, users and computers and their passwords will be inconsistent between domain controllers until this error is resolved, potentially affecting logon authentication and access to network resources.

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• Linux Experts Riddle: Network output of 10MB/s on 10GB/s NIC

  - by user150324

  I have two CentOS 6 servers. I am trying to transfer files between them. Source server has 10GB/s NIC nd destination server has 1GB/s NIC. Regardless to the command used nor the protocol, the transfer speed is ~1 Mega byte per second. The goal is at least couple dozens MB per second. I have tried: rsync (also with various encryptions), scp, wget, aftp, nc. Here's some testing results with iperf: [root@serv ~]# iperf -c XXX.XXX.XXX.XXX -i 1 ------------------------------------------------------------ Client connecting to XXX.XXX.XXX.XXX, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local XXX.XXX.XXX.XXX port 33180 connected with XXX.XXX.XXX.XXX port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 1.30 MBytes 10.9 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 1.28 MBytes 10.7 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 1.34 MBytes 11.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 1.53 MBytes 12.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 1.65 MBytes 13.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 1.79 MBytes 15.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 1.95 MBytes 16.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 1.98 MBytes 16.6 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 1.91 MBytes 16.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 9.0-10.0 sec 2.05 MBytes 17.2 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.68 MBytes 14.0 Mbits/sec I guess HD is not the bottleneck here.

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• PCI Express x4 network card into PCI-Express x16 slot?

  - by Gallus

  Is it possible to plug in PCIe x4 NIC into PCIe x16 slot?

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• Disable (or switch off) a network interface on windows but keep the "plug and play"

  - by Leandro

  I'm looking for a good workaround to do this on Windows 7 and Windows XP: Disable or make ineffective the network interface (ETH, WIFI, any NIC). If the user connect his ETH cable, the network interface enable again. Important Notes to take care: I'm working with wmic on Win7 (through the command line) I'm working with devcon on WinXP (through the command line) I'm specifically working with the .NET Framework 2.0 on C# but this is just for informational purposes. I know that an event won't help me to detect it (if there is a way or workaround to do this I don't know it). The real problem is that when I disable the NIC, I can't know if the user connects his cable or has a wired network. This is why I am looking for a workaround. I'll treat suggestions as answers if no direct answer exists. I'll provide any extra detail necessary.

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• Broadcom BCM5716 Hangs on CentOS 6 Boot

  - by someotherguy

  I have a fresh CentOS 6 installation on a Dell R310 server with a Broadcom BCM5716. The onboard NIC is causing the boot to hang for some reason. Welcome to CentOS Linux Starting udev: udev: starting version 147 Boardcom NetXtreme II Gigabit Ethernet Driver bnx2 v2.0.23b (Feb 01, 2011) bnx2 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 That's it... then it just hangs / freezes. If I disable the NIC via the BIOS settings, CentOS boots fine. I've downloaded and installed the latest driver from Broadcom's website. Any ideas?

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• Wifilink 5100 AGN mass update

  - by ripwads

  We are using a Meru enterprise wireless network with 180 APs. Recently, many users connections are dropping frequently. After much troubleshooting, we have determined much of the trouble is due to some settings in the advanced properties of the wireless nic on our notebooks. Now we want to send out the changes in a Zenworks bundle, but I cannot find these settings in the registry or anywhere we might be able to send out as a remote package. Does anyone know where to find these settings for an Intel wifilink 5100 card other that the NIC properties itself? We really do not want to manually configure 600 notebooks.

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• 2 Nics - Same Subnet..Route backup traffic through one of them

  - by Matthewhall58

  I have a windows server and a centos linux server. I want the nightly backup file (targz) that copies to the windows machine to use a different nic so that the main nic is not burdenend with moving the large file. Each server has 2 Nics in it. the network is 10.173.10.0 mask 255.255.255.192 Centos Linux Box: Eth0 is configured with 10.173.10.80 mask 255.255.255.192 gw 10.173.10.65 Eth 1 is configured with 10.173.10.71 mask 255.255.255.192 gw 10.173.10.65 Windows Box Eth 0 is 10.173.10.72 mask 255.255.255.192 gw 10.173.10.65 Eth 1 is 10.173.10.70 mask 255.255.255.192 gw 10.173.10.65 I can ping each machine from each machine. On the linux machine I use the command route add -host 10.173.10.70 dev eth1 but then when i ping 10.173.10.70 it is unreachable..... WHY?

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• Dell Vostro 1000 audio and wireless NIC drivers

  - by Ssvarc

  I have a Dell Vostro 1000 laptop with a fresh XP Pro install. I'm trying to track down the correct audio and wireless NIC drivers. I've used this Dell support driver page, but the drivers it gives for the service tag and XP OS don't work. Anyone have links to the correct, working drivers?

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• Windows route two logical networks on one NIC

  - by John Oxley

  I have a Windows 2003 server which has one NIC with two networks configured on it. There are two logical networks sharing the same layer 2 domain. How do I configure the server to route traffic between the two logical networks?

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• Broadcom 440x Ethernet NIC Drivers and Windows Home Server

  - by scottman666

  I have installed Windows Home Server on an older Dell computer, and it uses a Broadcom 440x Ethernet NIC driver. I have tried all of the drivers listed on their drivers page to no luck. The error message I get when trying to install is: "The parameter is incorrect" I know it is a long shot, but anybody have any suggestions? Thanks!

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• HP DL380 using HP NC522SFP NIC shows supported link modes: not reported

  - by MikeS

  When using ethtool on this NIC, the supported link modes show "not reported". Any idea why this is the case? Settings for eth0: Supported ports: [ FIBRE ] Supported link modes: Not reported Supported pause frame use: Symmetric Supports auto-negotiation: No Advertised link modes: Not reported Advertised pause frame use: No Advertised auto-negotiation: No Speed: 10000Mb/s Duplex: Full Port: FIBRE PHYAD: 1 Transceiver: external Auto-negotiation: off Supports Wake-on: g Wake-on: g Current message level: 0x00002000 (8192) hw Link detected: yes

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