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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Can I create a virtual internal network for my virtual machines in ESXi without using a physical nic?

Using ESXi 4.1 Want my Virtual Machines to be able to communicate with each other, share files, etc. I have 2 nics that go from the server to the network (one public and one private) however these ...
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462 views

Does Intel vPro work via add-on NICs?

We're currently using Dell OptiPlex workstations with the Intel vPro feature. A remote location is requiring their computers be connected via fibre for security reasons. This will require us to ...
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1answer
271 views

Dual NICs - Dual LANs

Summary: I need to setup a single PC with two NICs - to access a service on LAN 2 NIC 1 - Data network, web access. Range: 192.168.1.x Sub: 255.255.255.0 Gateway: 192.168.1.1 NIC 2 - No Web access ...
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Linux Ubuntu - Two NICs separate lan

I have this /etc/network/interfaces (IPs on eth1 are fake) auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255 gateway ...
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2answers
196 views

Netword card problem in LInux server - possible interrupt issue

I have a Linux server running CentOS 5.6 (64-bit) that was running fine using the onboard NIC. For testing an HP PCI-e NIC was installed too but the server wouldn't respond on the network through eth0 ...
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1answer
2k views

How to install (old) packages for Ubuntu 9.04?

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 ...
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138 views

Linux FOG Server Memory

I'm a computer tech at my high school, and our technologically-superior head just got fired. He just set up a Linux FOG server before he left, and we have to re-image all the computers in the school ...
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880 views

What is the fall off of subsecond throughput on Ethernet Network Interfaces

On a network interface, speeds are given in term of data over time, in particular, they are bits per second. However, in the uber-fast world of computing -- a second is kind of a really long time. So ...
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1answer
245 views

Precise Method of Failure Detection with Intel's Adapter Fault Tolerance NIC Teaming in Windows Server 2008 R2

What are the details of the method(s) that Intel Adapter Fault Tolerance (AFT) uses for the detection of failed links in Windows Server 2008 R2?
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482 views

NIC bandwidth usage graphing as percent (not kbps/mbps)

I would like to validate a certain thought with you guys. Assuming that: The device whose bandwidth I am measuring is an internal, Linux-based, router. If a NIC is configured to 100mbps, the network ...
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1answer
188 views

What's the best use of 4 nics for Hyper-V?

I'm running several Dell R710's, each of which is outfitted with 4 x Broadcom BCM5709C nics. Two of these R710's are running Hyper-V and a third is running SQL Server 2008, each running Windows ...
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2answers
162 views

Are Multiple NIC Ports Needed for a Cross Connect at a Colocation?

If one is going to run a cross-connect in a data center colocation does that mean that it requires another physical network port in the machine being connected? For example if a machine in a data ...
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What network loads require NIC polling vs interrupts?

Does anyone have some data or basic calculations that can answer when frame coalescing (NAPI) is required and when a single interrupt per frame is sufficient? My hardware: IBM BladeServer HS22, ...
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1answer
1k views

How to use two physical NIC's inside a Xen guest?

I'm trying to make two physical interfaces visible to a Xen machine. I followed the guide (http://idolinux.blogspot.com/2008/08/xen-add-network-bridge-for-eth1.html), and created two Xen bridges for ...
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1answer
457 views

Server NIC: Difference between IntelPro MT and PT

What's the difference between IntelPro MT and IntelPro PT server adapter cards? Would one of them be better for iSCSI? Thanks!
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5answers
755 views

Reading NIC bandwidth usage instantly

I want to create a script that runs on a linux server, that script should read bandwidth usage of NICs installed on other servers and then store them in memcached. So I need a command that reads ...
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2answers
128 views

XP box with 3 NICs on Server 2003 Domain

I have assigned all three NICs IP addresses that are outside the DHCP pool. I have 2 NICs are connected to 1 switch and the 3rd to my second switch. I want to assign one of the two NICs on the 1st ...
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459 views

NLB NIC w/ Static IP permanently “Acquiring Network Address” after adding more IP's to the cluster

We have a 2 node NLB cluster. I recently added more IP's to the cluster range, after which point, the NLB NIC's on both of my nodes ended up in a permanent "acquiring network address" state. The ...
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3answers
2k views

Slow NIC activation - Win2008-R2

I'm having this strange issue with this server (HP Proliant with broadcom NIC) running Windows 2008 R2. The network card takes almost 2 minutes to activate. That is, when you disable/enable the card ...
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5answers
2k views

How to route all traffic to one host trough one of two nic's on linux

Setup as follows: One gateway/firewall One switch Two servers behind firewall with 2 NICs each. Each NIC is connected to the switch. The servers are running Ubuntu server. One of the two NICs ...
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1answer
8k views

NAPI vs Adaptive Interrupts

Could anyone please explain how two following technologies are used to mitigate interrupt overhead under high networking load? Adaptive-rx/Adaptive-tx, and NAPI; I would appreciate an answer that ...
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3answers
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Hyper-V and Broadcom and Intel?

We just received our new server to begin our Hyper-V deployment. It was recommended that we get 4 NICs on the server. The server has 2 onboard BroadCom nics and 2 pci Intel Pro nics. The Broadcom ...
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How fast is 127.0.0.1?

I wonder it it is tied to my NIC at all or if the OS or driver intercepts and immediately returns data sent to the loopback address? Do the electrons actually travel to my NIC then the NIC returns ...
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1answer
997 views

Distribute IP packets accross different NIC queues with MSI (Message Signalled Interrupts)

NetXtreme II BCM5709 Gigabit Ethernet NIC supports MSI feature (Message Signaled Interrupts) and it has 8 queues. Each queue has its own Interrupt handler in /proc/interrupts. What I am trying to ...
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655 views

Sharing IPs between multiple interfaces in VLAN

I've got two servers with 3 interfaces between them all on the same VLAN. Server 1: 1 NIC, 1 IP block (/29) with subnet 255.255.255.248 Server 2: 2 NICs, 2 IP blocks (one /28 and the other /29) with ...
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How GRO (generic receive offload) works on more advanced NICs?

I am interested in particular answers: Does the NIC with GRO edits/creates TCP ACK or any other packets (or is this feature transparent to receiver/sender TCP stacks)? There should be a ...
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2answers
206 views

Server statistics (processor usage and bandwidth usage)

How can I find out how much of a load my webserver is under? I tried top but I don't know how to interpret the information it's showing me for CPU. While top may give me the CPU usage I also need to ...
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1answer
212 views

Disabling port on one dual port NIC interrupts connections to the other dual port NIC

This is using CentOS 5.5. I have two dual port NICs on a server: NIC1: eth0, eth1 NIC2: eth2, eth3 I have an ssh and vnc session open to the ip address on eth2. When I disable eth0 (ifdown eth0), ...
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1answer
550 views

Multiple IP's using one NIC connectivity problem - Windows

I have a frame relay network that is directly connected to a GPRS network. I also have a ADSL high speed network and recently I have been trying to achieve the following network configuration using ...
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3answers
952 views

Two NICs, one server

I have two NICs on a fresh install of Ubuntu 10.04 LTS. Both are config'd be dhcp. Both cards are on the same lan with same gateway. everything about the cards is the same except the IPs they get, ...
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857 views

Debian, 2 NICs load-balancing or agregating with one same gateway

I have one server, with double NICs connected to one switch with the same gateway. Behind the switch we have internet. |Debian| -> eth0 -> switch -> internet -> eth1 -> same I don't understand how ...
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NIC reordering on RHEL5/CentOS 5

I have an HP ProLiant DL360 G6 containing two onboard NICs as well as an HP NC375T (NetXen NX3031 chipset) 4-port PCIe card. The system was running with eth0 and eth1 belonging to the onboard NICs and ...
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698 views

Enabling 8021q on a nic

I'm trying to get a vlan interface on a bonded nic (Centos 5.5) and whilst the interface has been very happily created with vconfig I'm seeing no traffic on it at all. Running tcpdump and tshark on ...
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600 views

One Comcast Business Gateway, One Router, Two Web Servers

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. ...
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So what really makes a server grade NIC?

We have a couple servers hosting Citrix VM's. We are planning on adding SAN storage to our network so that we can do the quick migration and high availability thing. The question comes up with ...
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Kickstarting VMWare ESX 4.1 (Error: No NIC with name bootif)

I'm having an issue kickstarting an installation of VMWaare ESX Classic 4.1. I've stripped down my kickstart a bit to just: accepteula keyboard us auth clearpart --firstdisk --overwritevmfs url ...
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3answers
91 views

New server, Old nic

I have a relatively new server that I need to add an interface to. Sitting right next to me I happen to have an old 3Com 905b TX. This card came out of an old Windows 98 machine. It hails from back ...
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681 views

Increase network bandwidth between 2 servers

Is it possible to increase the network bandwidth between 2 servers on Windows Server 2008 and Windows 7 ? For example : Use 2 Gigabit NICs on each computer to have 2 Gigabits/sec between 2 machines ? ...
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1answer
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Multiple NICs with static IP address, default gateway problems

My server is running Ubuntu 10.04 64bit and have 2 NICs, my configuration is one interface for incoming/outgoing traffic of all the KVM guest running on this server, the other interface for different ...
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0answers
543 views

Receive Side Scaling disabled on a NIC Team

OS: Windows 7 Pro I'm working on a HP Compaq 8000 Elite Convertible Minitower PC and I added another NIC, I configured NIC Teaming (Switch Fault Tolerance mode) and I'm getting a pop-up box that ...
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1answer
789 views

Hyper-V multi-homed host NIC?

In Microsoft's Hyper-V virtualization engine, is it possible to have a multi-homed host NIC (i.e. with several different IP addresses) then have several guest VMs, each of which corresponds to one of ...
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1answer
621 views

BSOD on Hyper-V after creating Virtual Network on Intel NIC

I have a home server with a Gigabyte P55M-UD2 motherboard, 16GB of DDR3 RAM, a i5 760 proc and 2 off-board Intel(R) Pro/100+ Management Adapter NICs. I installed a Windows 2008R2 Enterprise on my ...
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1answer
232 views

2 nics, 1 subnet, 1 gateway… is it possible to make that one nic will be for physical server and second nic for Hyper-v only?

We have a WindowsServer2008R2 with Hyper-V with physical 2 nics, 1 subnet, 1 gateway..is it possible to make that one nic will be for physical server and second nic for Hyper-v only? Thanks in ...
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489 views

PCMCIA NIC with 2 ports

I have a laptop which I want to turn into a PFSense router. To do this I need a minimum of two network ports, which is fine, because I have one built in port and I can purchase a PCMCIA NIC with one ...
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broadcom 5722 NIC not installed on Ubuntu Server, although driver present

I just installed Ubuntu Server 10.04 LTS, running kernel 2.6.32-24-server, on a brand new Dell T110 server, supposedly fully compatible with Ubuntu Server. I have two NICs: one ONBOARD, the other ...
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960 views

Dual Port Server Nic Question

I'm speccing out a new server that will need to have two physical network connections. I'm looking at one of these: ...
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2answers
1k views

WMI and adding Multiple IP Addresses?

Is it possible, with WMI, to bind IP addresses to a NIC? I have been able to enable a static IP, but I can't seem to find any information on adding additional IPs. this code helped and after I ...
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1answer
236 views

Strange Network Card Issue (not showing in device manager)

A friend asked if I could have a look at one of their computers because they kept losing all network traffic (local and internet). Unfortunately I forgot to write the motherboard name, but it was an ...
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1answer
293 views

Is there a method to send UDP output to one logical NIC such that it gets sent out two physical NICs on different subnets?

I have an application that needs to send UDP multicast data "from" either one or two physical NICs on a single Windows Server 2008 machine. In the two NIC configuration, every datagram needs to be ...
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2answers
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dual interface NIC with hw bridging?

I'm looking for a PCI NIC with two PHYs that is capable of bridging/switching in hardware but allows the host to monitor the traffic. Does such a thing exist? This would be running on a linux host. ...