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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Added a new NIC, can't reach any devices off the interface (ubuntu)

I was wondering if anyone could help me narrow this problem I have a gateway running Ubuntu server 10.04 (LTS) and I have added a new NIC to it which is a Intel PRO 1000PT GbE, bringing the ...
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480 views

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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168 views

How do I calculate the ethernet NIC-to-NIC time to send a MTU packet (1500 bytes)? (OS-excluded) [closed]

I understand it will depend on the speed of the ethernet 10 Mbit to 100 Gbit. Given an ethernet speed, how do I calculate the time spend in the wire from NIC-to-NIC? I am assuming here that the ...
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1answer
98 views

Installing ESXi/ Hyper-V using NIC supporting iBFT

We can install ESXi to a iSCSI target if we have NIC that supports iBFT. But what I am trying to see is if we can install ESXi by booting off an iSCSI target which is a mounted ISO? How about Hyper-V ...
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2answers
115 views

VMWare NIC's on Virtual Machines

I'm running on esxi(which has 2 physical NIC intern -extern) 2 Ubuntu 12.04VM's each connected to internal NIC. How could I bridge theme to have internet on both of theme without to use for each one ...
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1answer
243 views

Assigning two IPs to one NIC in CentOS

I have been following this method described here: http://linuxwave.blogspot.com/2010/01/setting-virtual-ip-in-centos.html To assign a virtual IP to one NIC. Basically I copied ifcfg-eth0 and makde ...
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2answers
125 views

Is Teaming with one Network Card possible? [closed]

If my Network Card has 4 ports can I do teaming (LBFO) ? Or I need to have two Network Cards ?
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287 views

Ubuntu 12.04 LTS NIC Broadcast Multicast (Link is not up)

We have 3 Dell PowerEdge 2950 Servers. 2 x 3.2GHz 5060 Dual Core 16GB RAM 6x146GB Recently, one of the servers experienced a NIC failure so we decided to replace all the NICs on all three servers ...
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1answer
89 views

Onboard Gigabit vs Add-in Server NIC [closed]

If you have server systems running high-end desktop PCs and a few running smaller SQL instances. The systems are time critical so the lower latency we can achieve the better. As it stands we don't ...
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2answers
127 views

Performance Impact of adding more NIC cards to a Linux router box

What would be the impact on performance if more and more NIC cards are added to Linux box for routing traffic to different networks. Lets say i have 10 different networks and i only have a single ...
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640 views

why 5 rx queues per NIC

On my office server, the output of cat /proc/interrupts displays one tx queue and 5 rx queues. Is this due to NIC hardware capabilities or can you configure multiple receive ring buffers in linux per ...
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144 views

Server for virtualization [closed]

HP Proliant DL380 G5 I have looked at this server for some good virtualization. I can get the server for around 450usd 2x xenon (X5355) 2 x 72GB HDD 8GB Ram As my g3 360 and g4 360 and g3 360 are ...
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2answers
944 views

VMWare hypervisor with only 1 network card?

VMWare hypervisor minimum requirements states that the minimum network requirements is: one NIC, plus one for Management interface (source: ...
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2answers
177 views

I need file upload to networkless OS with IPMI

Using an IPMI-mounted iso file, I've installed a simple Ubuntu remote server (no X, no Java, etc). However, the kernel has no driver for the NIC. So, after booting it, I am stuck. I've compiled the ...
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2answers
310 views

VIP and private IP on same NIC

Is it possible to configure in the same NIC a VIP and a private IP (different) and both be enabled/accesible? If yes, is there a guarantee that the communication path for these 2 IPs will be exactly ...
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1answer
295 views

Teamed network cards on a Proliant Server

We have 4 network cards in a Proliant server with Server 2008R2 running Exchange 2010, with 1 card set to a static IP address and the other 3 set to DHCP. I just need some clarification as I have not ...
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2answers
106 views

allowing 2 VM's to communicate RED HAT 64 bit [closed]

My physical PC is running 2 VMs on virtualbox. Both of the VM's are linux 64 bit. I am going through this tutorial: ...
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3answers
88 views

Multiport NICs in servers and clusters [closed]

I wanted to know are multi-port NICs common in server systems? E.g in clustering are they used always?
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2answers
3k views

What is my NIC ID?

I need to get my NIC ID for a temporarily software license to be generated for me. How should I find my NIC ID? I have found contradictory information on the web. Some suggested that I run ...
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1answer
452 views

How to configuring Ubuntu 10.04 server for multiple gateways in a simple way

I have a simple Ubuntu 10.04 server that runs a service. The system has two NIC cards each configured for separate networks. Each NIC needs a separate gateway, but when both are configured, eth1 ...
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2answers
261 views

Why have a server with 6 NICs [closed]

So we are using a pretty powerful server at work, a Dell PowerEdge R710 Server, which comes with 6 1GB NICs. I've searched and thought a lot but am hard pressed as to why one would want a server with ...
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1answer
210 views

networking with one NIC and access to internet and virtual machines

I have installed opennebula and I have followed this tutorial. Unfortunately I cannot ssh to the virtual machines that appear to be in a running state and already have an IP. The problem might be that ...
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385 views

Can I have 2Gbit over 1Gbit Nics [closed]

So this really baffles me. Apparently because 1Gbit can transmit data in both directions simultaneously it should be possible to get 2Gbit of data transfer on a single NIC (1Gbit flow seend and 1Gbit ...
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1answer
243 views

vmware not getting ip on dell r620

Installed a new ESXi 5.1 on a new Dell R620 When connecting to the iDrac (Enterprise) from the dedicated iDrac connection I can see 1 NIC connected (beside the integrated jack) The problem is ...
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300 views

How to use ESXi for testing physical NICs?

I am developing NICs and NIC drivers. My NICs have very distinct behavior : they have custom data rate (10/100/1000/10000/14000/18000), and they have their own drivers. I would like to do QoS tests, ...
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249 views

Dell Equallogic SAN - 4000 series to 6000 series connectivity issues

I have a 4000 series in production with two physical NICs and a group IP. I have a 6000 series in a DR site with four physical NICs and a group IP. 4000 series NIC1: 10.0.12.2 4000 series NIC2: ...
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3k views

Why is ethtool not showing me all the properties for a NIC?

CentOS 5.8 | VMWare ESX 5.1 When I run ethtool eth0 I see the following: [root@foo ~]# ethtool eth0 Settings for eth0: Current message level: 0x00000007 (7) Link detected: yes ...
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160 views

connecting to server with multiple nics in other vlan

I'm sorry to be unclear... I will try to rephrase the problem. I work in a school as IT-administrator and I'm not a specialist, but try to make the best out of it. I hope you guys have a little ...
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1answer
2k views

Intel NIC X540-T1 non-functional in Ubuntu Server 12.04

I have installed three Intel X540-T1's in servers running Ubuntu Server 12.04, but all are non-functional, no link lights, no packets sent or received, and no connection on ip4 or ip6 whether set up ...
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1answer
3k views

Assign individual NIC to KVM guest

I have a server with 6 NICs installed and is running Ubuntu 12.04LTS. I want to setup 4 guest VMs using kvm. Now I want to assign 2 NICs for the host(1 Public IP and 1 private IP), and 1 NIC each to 4 ...
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343 views

can't connect 2 subnets through RRAS 2008 r2

I'm working on a project for a networking class. In VMWare Workstation, I have to set up a 2008 r2 server with DHCP reservations for 2 clients on separate subnets and have them ping each other. Here ...
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129 views

What is the fastest way to connect two machines for a ping-pong test? [closed]

I need to do a latency test between two machines, basically a ping-pong packet test. I wonder what is the fastest connection I can have between those two machines. I imagine my options are: Ethernet ...
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1answer
123 views

I couldn't get 2 NICs working together on Ubuntu 10.04

I've got an Ubuntu 10.04 server with this configuration: eth0: 192.168.10.XXX mask 255.255.255.0 gw 192.168.10.254 eth1: 192.168.0.XXX mask 255.255.255.0 gw 192.168.0.3 eth0 is used for incoming and ...
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3answers
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How to configure 2 NICs with 2 different gateways?

I have a server with 3 NICs running RHEL6. eth0 is connected to the intranet. eth1 is connected to the Operations and Maintenance Network eth2 is connected to an automated backup network (doesnt ...
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1answer
124 views

Two network cards latency

I'm trying to setup a network architecture where one network is a low-latency low-bandwidth tcp control system (GBit), the other is a high-bandwidth udp (maybe tcp) network that could get saturated ...
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2k views

How do I rename a NIC: eth2 -> eth1

I've installed a new NIC. It shows up as eth2. I'd like it to be eth1. How I can do this?
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1k views

Get detailed network adapter information using PowerShell

Is there an alternative to Get-NetAdapterRss that can be used on Windows Server 08/03/etc.? I'm looking to query NIC information from servers with a powershell script, but cannot seem to find how to ...
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Do Gigabit ethernet single-mode fiber network adapters exist?

I am attempting to set up a server with a total of four single-mode fiber ports - two need to be at least 1Gb and two must be 10Gb. I have found a variety of 10Gb single-mode fiber network adapters ...
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188 views

Cannot browse HTTP to a load balanced VIP from w2k8 boxes, but can get to it from w2k3

I have a strange problem and am looking for suggestions. The environment: several VLANs on the same switch, that all talk to each other via the ASA using hairpin routing: VLAN 500 - Windows 2003 ...
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3answers
1k views

Cisco SG 300-28P PoE switch appears to have damaged my domain server's network IF

I just replaced the old HP ProCurve switch with a new Cisco SG 300-28P managed switch. It has PoE on all ports. Everything works, except for my domain server that went offline and the network ...
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1answer
435 views

MAC address allocation for channel-bonded interface

I've configured Channel-bonding (on RHEL/CentOS) with with balance-alb (mode=6) option: BONDING_OPTS="mode=balance-alb miimon=100 updelay=200 downdelay=200" which is working fine and according to ...
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97 views

Impact of Traffic through the first NIC on the second NIC

I have two NICs on a RHEL 6 server. They are both set at 1GB/sec full duplex. The first NIC has lots of small (< 100 byte) TCP socket writes. The second NIC is used to receive a 50 MB/sec TCP input ...
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701 views

NIC Teaming , Multi-Homed, Active/Passive

I'm fairly new to NIC Teaming.. So I apologize if I’m not making any sense while describing this. I’ve, of course, set up plenty of simple Active/Active NIC teams for our servers without any issues ...
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1answer
297 views

Setup two NICs, one public and one private

I have two servers in a datacenter, both running Windows Server 2008 R2. Both of these servers have 2 NICs. I am trying to setup one NIC to be used for public access and the other for a private ...
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2answers
554 views

bonding NICs w/o switch

(This may not be possible, but I thought I'd ask just in case it is, as it will save a considerable amount of cash.) I'm building cluster of sorts that has one shared storage unit and two computing ...
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4k views

PCIe x8 NIC in PCIe x16 slot

I have a motherboard with only one x16 PCIe slot and no x8 slots. I am buying a NIC with very specific configuration, but it is available for x8 slots only. Can I plug a x8 card in a x16 slot? I have ...
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2k views

interrupt coalescing for high bandwidth packet capture?

I have an application which does packet capture from an ethernet card. Once in a while we see packets dropped (we suspect due to the buffer in the network card or kernel being overrun). I am trying ...
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1answer
498 views

How do I setup a NIC for outgoing connections and the other to serve my Squid proxy?

I have an internal network (192.168.2.0/24) that I'm supposed to connect to a proxy. I've already installed and test(with a little traffic) an Squid 3 cache/proxy server in a Ubuntu 12.04 box with ...
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1answer
604 views

Centos VM serving multiple public IP: how to configure network interface?

I have a Centos 5.6 VM (vSphere client) already responding to two different public IPs on eth0 and eth0:1 and I'm trying to add eth0:2. I copied the eth0 config file and restarted the network service. ...
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2answers
309 views

What are the steps to set up a Hyper-V solution with one NIC

I have successfully installed centos on a virtual machine via Hyper-V on Windows Server 2008 R2. This server has one NIC. I have created a virtual NIC, and virtual subnet, and within the virtual ...