A Network Interface Card is a computer component which connects to a physical network in order to send and receive data.

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Intel Corporation 82540EP NIC and “rx_missed_errors” at 140Mbps

I have an Intel Corporation 82540EP Gigabit Ethernet Controller which uses module e1000 version 7.3.21-k8-NAPI. While it is a GigE NIC, I receive "rx_missed_errors"(ethtool -S eth0) already in case of ...
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791 views

Dedicating Network Adapters [closed]

I am looking for some clear instructions (a blog or something similar) on how one would go about setting up a dual network adapter in such a way so that: One network adapter is used for user traffic....
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42 views

WMI permissions for changing local IP without elevated privileges

I have implemented a tiny tool that allows one to change the IP settings of a selected Network Interface (NIC) by overwriting the values via the WMI. I've noticed that the tool can change the settings ...
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23 views

How to filter outgoing Ethernet packages by Ethertype?

I'm working with Ethernet Powerlink, which is a real-time protocol using standard Ethernet hardware, but forbids any interfering Ethernet communication. Now, when I connect my Linux laptop to the ...
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NIC cards in a LINUX server [migrated]

I have below doubts, Can someone clarify, please? Four interfaces(say eth1, eth2,eth3,eth4) are configured with different subnet IP addresses in my LINUX server, so does that mean are there four ...
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4answers
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ESXi 5.5 NIC teaming for Load balancing using Cisco Etherchannel

I am using Cisco 3750G stacked switch configured with etherchannel and connected to ESXi Server configured with NIC teaming; Load balancing as router based on IP Hash. Cisco Switch configuration: ( ...
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1answer
27 views

Fibre Channel Adapter as a NIC?

Is it possible to use a Fibre Channel PCIe adapter as a network interface? I have Qlogic fc controller and 3com gigabit switch. I use Debian on a DL160 G5.
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1answer
44 views

Can I use a HBA to connect to Internet

I recently got a QLogic QLE2460 network card which seems to be a Host Bus Adapter. Can I somehow use it as a network interface (NIC) between my server/workstation and a Cisco Catalyst switch with ...
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1answer
24 views

Hyper-V unbind NIC from host

I have a server with 2 NICs. NIC1: direct cable from modem (ISP provides 8 public IPs). NIC2: to the internal network. Software is Hyper-V Server. Created 2 Virtual Switches in Hyper-V, one with ...
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1answer
146 views

Is it possible to have a link between a 10GbE NIC and 1GbE Switch with a SFP+ DAC?

I've just installed an Intel 82599 based NIC with 2 SFP+ ports in my server. Right now I have a PowerConnect 2824 switch, which has 2 1Gb SFP ports. I tried linking them with a 10Gb SFP+ DAC (a ...
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26 views

frequent delay of 5-10 sec in sending commands from putty redhat. Why?

When we type a command from putty, it suddenly hangs for a period of 5-10 sec or more, but the commands are sent to terminal later. So seems to be a latency which occurs frequently. But, I might be ...
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e1000e Reset adapter unexpectedly / Detected Hardware Unit Hang

I have a Dell 1U Server with Intel(R) Xeon(R) CPU L5420 @ 2.50GHz, 8 cores running Ubuntu Server Kernel Version 3.13.0-32-generic on x86_64. It has dual 1000baseT networking cards. I have it set up to ...
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1answer
17k views

LOM vs. NIC for iDRAC with Dell PowerEdge R720xd

I'm trying to get going with iDRAC 7 Express (no Enterprise license so we can't use the dedicated port). In the setup menu for iDRAC, it asks to choose which network interface to use for iDRAC. ...
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2answers
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Need a script to add a second IP address to a Windows machine

Does anyone know how to create a .reg registry script that will add a second IP address to a machine that is called 127.0.0.2 ? Here is the "manual" method: Go to the Control Panel > Network ...
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2answers
158 views

Getting NIC speed from Powershell on Win2008 R2 Server

I am trying to get the NIC speed via Powershell on some of my servers. For my lab server I know there is a 1GB NIC in there. However, when I do this via Powershell I get the below weird number: Get-...
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1answer
48 views

Binding multiple IPs to one NIC [closed]

I'm trying to set up an ubuntu 14.04 server to listen on multiple IP addresses. A range has been assigned to the server (X.X.X.146/29) and ip addr show confirms that this is how eth0 has been ...
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3answers
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MDT Deployment Issue-Driver not loading (i217-LM on MDT)

I have been testing a replacement imaging system to replace our limited Ghost deployment system for a good portion of the last year. We bought a new batch of machines (HP Workstation Z230) which have ...
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What is the command to flash a NIC link light?

I remember using a command line tool to flash a NIC's link light to identify it. I can't remember for the life of me what it was.
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1answer
23 views

Routing traffic coming from specific IP to go through specific gateway

This is my problem. I have a server with 2 nic cards A and B A (10.x.x.1) Default Gateway (10.x.x.254) B (192.x.x.1) Default Gateway (empty) NIC A all outbound traffic goes out through it. NIC B ...
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1answer
34 views

How to disable virtual IP on centOS

I have 5 Centos machines and 2 of them have virtual IP enable on it. This is causing problem for some of the application specifically MapR. Here i need to disable virtual IP address. I have a ...
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1answer
90 views

Troubleshooting NIC Logs by NETDEV WATCHDOG

I have a CentOS 6.6 server (Linux 2.6.32-504) running on a brand new Dell PowerEdge R320. Just the other day, I began noticing problems in /var/log/messages related to one of my NICs. Note: this is a ...
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4answers
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multiple physical interfaces with IPs on the same subnet

I have a linux box with 9 NICs on it, and I want eight of them to have unique addresses on the same subnet, e.g.: ifconfig eth1 192.168.123.1 netmask 255.255.0.0 ifconfig eth2 192.168.123.2 netmask ...
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1answer
46 views

TP-Link TG-3468 on an IBM x3850 M2

I got a networks card from TP-Link. It is the TG-3468. I wanna place it into my IBM server x3850 M2. It has PCIe x8 slots. The slot is a little bit longer than the lenght of the card, but it fits. ...
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85 views

Choosing gateway based on Source IP in Windows

So here is the scenario I have one NIC configured with two ips and two gateways for two diff networks. Consider the gateway/subnet are 192.168.0.1/24 and 192.168.1.1/24. If connection is initiated ...
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Intel S5520HC - onboard NICs U/S, but also an addon QP card?

All We have a server with an Intel S5520HC motherboard, two E5620 processors, 6x2GB memory modules and four 1TB hard drives in RAID 10 connected directly to the board. I'm trying to be as detailed ...
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Finding NIC firmware version

I need to find out the firmware version of the NIC(s) on on IBM Windows Server 2008 using CMD, Powershell or by any other means.I also should note that I can't reboot the server to go to bios or use ...
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Multiple 3G USB dongle conflict

I have 5 Huawei E303 hilink USB 3G dongles attached to my PC. Only the first dongle that is attached is able to get Internet access, all subsequent dongles then attached complain: 'unidentified ...
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1answer
39 views

CentOS, 4 NICs: two teams redandant, each team has 2 NICs, is it possible?

We have one CentOS7 or RedHat 7 "BIG" HP Proliant DL360 Gen 9 server with 4 NICs, two external switches Switch 1 and Switch 2 and many "small" servers. Those small servers have two NICs: those NICs ...
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35 views

Any 3 port NIC's made? [closed]

basically want a 3 ethernet port NIC. is there really none of these available? cause i'm working on a project that only requires 3 ports,and the 4 port ones are ridiculously expensive. Yes,i know ebay ...
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Problems with Supermicro X10DRi-T NICs

I've got a workstation with Supermicro X10DRi-T mainboard. It has three Ethernet ports. One of them (IPMI LAN) is dedicated to IPMI. The other two, LAN1 and LAN2 are general-purpose. This question ...
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1answer
133 views

windows 2012 r2 nic teaming does not aggregate bandwidth

2 X Dell R730 boxes each with Dual 10G broadcom NIC. NetGear 10G 10BaseT switch. LACP set in switch. Boxes config with NIC Teaming (switch dependent, dynamic, all active). - when I copy a file I get a ...
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424 views

Multiple Nics, multiple default gateways on a Server 2012R2 cluster

This is really just a question about best practices as there seems to be a little confusion. The physical hosts of our Hyper-V cluster have 4 Nic interfaces relating to the 4 subnets. Now, when ...
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Assigning 2 IPv4 blocks to one interface

I have been assigned these 2 blocks by my provider Block: x.x.x.184/29 Usable range: x.x.x.186 - x.x.x.190 Gateway: x.x.x.185 Subnet: 255.255.255.248 And Block: x.x.x.192/29 Usable range: x.x.x....
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How many NIC's in relation to processor cores? [closed]

I have server with four cores procesor (non HT) and two NIC's onboard. Is it reasonable to add four additional NIC's (ie. Intel PRO/1000PT) or only two new NIC's will be enough (ie. Intel PCI-E ...
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what are the memory impacts of increasing a NIC's ring buffer?

What impact (if any) does NIC ring buffer tuning (e.g. via ethtool -G eth0 …) have on system memory utilization? For example, does increasing the ring buffer consume more RAM? And if so, how much? Or ...
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QEMU/KVM nic properties

1) What's the use of the addr value when specifying a new network interface on QEMU/KVM ? Example: qemu -hda deb.img -net nic,addr=192.168.1.10 2) Is there a way to specify directly the IP address ...
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104 views

Route Between Two Virtual Interfaces on one NIC Linux

I have an Ubuntu machine that is my firewall The Machine has 2 NIC Cards. eth0 and eth1. eth1 is connected to a modem that gives it an IP of 10.10.1.X eth1 is required to provide DHCP on 192.168.2.X ...
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743 views

Supermicro NICs gone after BIOS update

Just updated the BIOS of two Supermicro 1022G-URFs to R3.5. They've both the mainboard H8DGU-F with two onboard Intel 82576 NICs. One of the two Supermicros doesn't have any visible NICs at all after ...
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IP address change eventlog in Windows System

Domain Controller - Windows Server 2008 R2 Standard Client OS - Windows 7 prof. Recently on one of my Windows Server 2008 R2, the ip address has been changed. So i need to know how it has been ...
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1answer
260 views

Windows Server 2012 NIC Teaming vs. MPIO [duplicate]

I've got a server with Windows Server 2012 R2 installed on it. 1 NIC on the server is used for management purposes and I've teamed the 3 other NICs which communicate with our SAN to carry out VM ...
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27 views

NIC Team, Trunking, WS2012/HP2920

I have another problem. I made a NIC Team on Windows Server 2012 R2 containing 2 Interfaces. It's created as LACP. Also, on Switch HP2920 I have two ports as a trunk (trk1), and also as LACP. When I ...
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3answers
741 views

Where to download the latest 2.4.x Linux kernel while kernel.org is down? [closed]

I need to run the pre-paleolithic (10 years old!) SuSE 7.3 under VirtualBox. (Don't ask. I just do, ok?) I managed to successfully install it. It boots. It recognized the virtual NIC (pcnet32 module) ...
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CentOS 6, 2 NICs, 1 gateway, 1 NIC doesn't work right

I have a CentOS 6 install that had 1 NIC, eth0, working fine I added another NIC, eth1. Both NICs are on the same switch, and same LAN. I copied ifcfg-eth0 to ifcfg-eth1, and then simply changed ...
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How do I troubleshoot slow NIC on R610 Dell?

I recently set up 2 new R610 servers that I purchased. Summary: Both servers 100% same hardware Both installed with Centos 6.7 64bit Tested multiple switch ports, same slowness issue. Both same full ...
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RSS hash tuning for mellanox NICs on windows

I found this document that mentions about changing the RSS hash algorithm for small number of connections. The default RSS hash calculated by the adapter is a Toeplitz function. On some ...
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How can force mailslot to broadcast traffics on all network interfaces of the system?

I have two PCs running on win7 and each one is equipped with two network adapters. Both system can see each other shares on both NICs. I also have written a simple client-server mailslot. Client is ...
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1answer
116 views

QNAP TS-EC1279U with X520-DA2 (10GBe) Loosing NIC conneciton after workstation reboot

=== Configuration=== Your Operating System you are using to access your NAS. Win 7 NAS model: TS-EC1279U-RP Firmware Version/: 4.1.4 Network Setup Single Port Static IP (192.168.1.199) (10GbE) ==...
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Setting up 2 NICs, 1 for Internet 1 for Phones

I have FreePBX setup and it has 2 NICs. I've been trying to configure it out so that: eth0 will continue to be the one used for all the office phones and internal calls; and eth1 is the new NIC ...
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55 views

Server 2008 - 1st NIC's traffic stops when 2nd NIC is plugged in

I have a file server running Windows Server 2008 R2 with 2 NICs in the back. These are their configurations: Connection #1 Local Area Connection 10.1.37.6 255.255.255.0 [No Gateway] Connection #2 ...
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Win 2012 - Create new NIC team only shows me virtual NICs, not the physical NICs, why?

I am setting up a new win2012 server with NIC teaming. The server has two physical NICs and I want to create one NIC team in the management OS that uses both NICs. My problem is that when I installed ...