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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Need to configure 2008 server with 2 NICs on different subnets

I am working on an application that requires a 2008 server to have 2 NICs for security purposes. NIC 1 will be connected to the customer's enterprise network with a static IP and is routable. It ...
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1answer
93 views

Two Nics, one direct connection and forwarding

I'm designing a system with a Server PC with two nics running Centos 6 and a Sensor Device which runs a web server. The Sensor Device is connected directly to one of the nics of the Server PC. All ...
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1answer
230 views

Layer 2 Load-Balancing on redundant Architecture

Some PCs with 2 NICs are bound on 2 Switches in order to avoid a Single-Point-of-Failure (the switches are interconnected to each other too). Under which cirumstances is it possible that the PCs can ...
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0answers
64 views

if there are 2 NIC on the same machine, can a tcp client on one NIC connect to a tcp server on the other NIC?

I use tun/tap to create a tun NIC tun0 with IP 10.10.10.2, and I have a real NIC eth0 with IP 202.112.34.49 then I run a tcp client which binds its socket to 202.112.34.49 and a tcp server binding ...
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1answer
251 views

How to block outgoing traffic of the mac address of one of the server's own NIC with ip tables?

i have a server with 5 nics connected to a switch, and running GNS3 (cisco router emulator). I need to block, in the server, the packets originated by the nics at layer 2 level (the nics are not ...
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2answers
121 views

Do I need 2 NIC cards to forward public IP to private IP? [closed]

To use NAT do I need 2 nic cards? I want to use my server for my own business (I don't require VPN) and simply need to forward my public IP to the private IP so that websites show up as ...
4
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3answers
6k views

Why did robocopy cause my Windows 2012 server to hang last night?

I'm in the process of decommissioning an old 2003 server, which acts as a file server, and am just attempting a dry-run of migrating the file repository over to a new Windows Storage Server 2012 box. ...
2
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1answer
940 views

FreeBSD Nic Setup - Dual NICs with lagg

I have a server running FreeBSD 9.0. It has two NICs using the igb network drivers. I was given a range of IPs, for example's sake I'm just going to make up some IP addresses, so let's say ...
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1answer
86 views

SetFTP access to 2nd nic

I have a situation where we have our main LAN/Domain that all users connect to and provides access to the WEB. We have a couple of individuals who on occasion will begin an extended FTP download, ...
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1answer
10k views

Setting up routing in CentOS 6.4 as a router/DHCP server with two nics

I am stumped about how to setup centOS 6.4 to route packets. |Local Network| -eth0- |CentOS 6.4 box| -eth1- |Internet| The centOS box has a dhcp server running. Currently it is handing out IP ...
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1answer
1k views

VSphere 5.1 DHCP Server VM routing

I am trying to setup the routing for a VM that is my firewall/dhcp server. I have 3 VMs: router/firewall (centOS) -> VM1 unRAID(unraid) -> VM2 download-server(ubuntu server) -> VM3 2 NICs vmnic0 ...
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1answer
973 views

Intel igb driver building with checkinstall

How to properly compile the latest Intel igb driver (4.1.2) with checkinstall ? When I am trying to do this I got following error: *checkinstall -D root@debian:~/igb-4.1.2/src# ...
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2answers
217 views

How to “dedicate” a 2nd NIC correctly without provoking a storm?

Some parts / aspects of this topic have been discussed here before. Leading up to my question: eth0 is the official nic of my ubuntu 12.04-server eth1 is the "local=yes" port of bridge 'br1' ...
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2answers
379 views

Server 2008 on VMware vSphere 5.1 - nic takes 20-25 mins to connect to the network

I have VM with Server 2008 R2 on it that I just recently installed Exchange 2010 on. It has been working 100% till today. This morning I installed ESET (antivirus) on the machine and then this ...
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1answer
111 views

Difference between GBIC and SFP [closed]

What is the difference between GBIC, SFP, SFP+?
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1answer
109 views

Giving Multiple ip address of same n/w on two virtual nic

running xen with 2 guests i have been trying to assign public ip addresses to two virtual nic, one each which is sharing bridge networking with host. tried this Host x.x.116.2 created two nic ...
0
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1answer
685 views

How do I create a Debian netinst installer that has a 3rd party network driver?

I want to install Debian on a machine, but the kernel and modules in the squeeze netinst module do not support the network driver. I can build a kernel module that works, but: How do I get the same ...
0
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1answer
593 views

Dell r900 and SFP+ HBA

I'm trying to pair up the parts and pieces to get an already purchased Dell Equallogic PS6010E going, with a couple existing Dell r900 servers for ESXi 5.0,and keep running into show-stoppers. The ...
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1answer
22 views

Protocol moves to another ethx Suse

I have a server which has 2 nics eth0 and eth1 eth0 is used for our email traffic server. everything working fine some time later a eth1 was added for backup purposes so this new nic sends data to ...
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0answers
709 views

routing internet via WLAN, but still connect to local LAN

I have 5 computers which are normally connected to an LAN, which is connected to internet access. However, rarely the internet provider has a fault and this causes the LAN to lose internet ...
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1answer
1k views

FTP Error 500 Illegal Port Command - PORT command sending different IP than source of request

The problem I'm experiencing is that I'm getting a "500 Illegal PORT command" Response from an FTP server when attempting to upload a file programmatically. This program is a small c# application ...
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0answers
250 views

linux ethernet card ping problems?

I have a very strange problem with my ethernet card. Here is ethernet card details: description: Ethernet interface product: RTL8169 PCI Gigabit Ethernet Controller vendor: Realtek ...
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1answer
87 views

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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2answers
1k 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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2answers
260 views

Static route to all ips except a defined set

I was wondering whats the best way to do a static route for all ips except a predefined set. For example, I have 2 networks attached to one workstation. I want all ips except 192.168.0.0/24 to go ...
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1answer
59 views

Specify what network connection to use based on IP being accessed [closed]

Basically, we have a number of machines with two network cards. One is wireless, one is not. The wireless is connected to the internet, while the other one is connected to a route and a bunch of ...
0
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1answer
205 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
416 views

Additional external IP address is not reachable when acitvating NAT

I am running a Windows Server 2008 R2 with 3 nics (2 with external IPs, 1 with internal IP). The two external IPs are associated with two web sites running on that server. The third nic is for ...
0
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1answer
120 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
131 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
293 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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1answer
113 views

Email flow issues when additional NICs are activated in Exchange 2007

I am currently working in an Exchange 2007 Environment which is quite basic - an EdgeSync Server and an CASHUB. Both of which have two NICS, ostensibly for an internal and external interface in the ...
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2answers
135 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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0answers
401 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
100 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
145 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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1answer
1k 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 ...
0
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1answer
351 views

openvz dual nic setup from scratch

I have a openvz server that has 2 nics I need 1 for ethernet and the other explisitly for nfs traffic. eth0 goes to the lan/internet currently doesnt have ipv6 but will be getting a static ip soon. ...
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1answer
160 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
1k 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
295 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
452 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 ...
1
vote
1answer
534 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
109 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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2answers
718 views

VMWare vSphere 5: 4 pNICs for iSCSI vs. 2 pNICs

New SAN for me, never used before: it's an IBM DS3512, dual controller with a quad 1GbE NIC per controller that a client bought and needs help setting up. Hosts (x2) have 8 pNICs and while I usually ...
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3answers
94 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
8k 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
538 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
288 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
334 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 ...