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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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: ...
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39 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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13 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
32 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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1answer
50 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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1answer
23 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
45 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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54 views

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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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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1answer
59 views

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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2answers
103 views

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
54 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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3answers
175 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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23 views

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: ...
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1answer
77 views

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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29 views

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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1answer
28 views

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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73 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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51 views

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
134 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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23 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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2answers
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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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118 views

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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37 views

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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6 views

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
82 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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1answer
18 views

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 ...
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1answer
46 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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94 views

Isn't setting “Number of RSS queues” to “1” pointless?

If I understand RSS (Receive Side Scaling) correctly, the src/dst IP+port combos of incoming UDP and TCP packets get hashed, and the packet gets distributed into the available RSS queues using that ...
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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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1answer
34 views

Setting Up Usable IPS on Debian

I have a dedicated machine that I am renting with 5 usable IP. The only issue is that only one IP is set up to be public and I'm trying to get the others to be public. I've tried following a few ...
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1answer
34 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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1answer
101 views

Frame error on Primary NIC

I have a 25 Node Cloudera cluster and on all the nodes i am getting critical warning Network frame errors account for 0.95 of incoming network packets over the past 15 minute(s) across all monitored ...
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1answer
217 views

Change Xenserver 6.5 MTU

How do I go about change the MTU setting for my management interface in xenserver 6.5? Right now its set to the default 1500 but I want to increase it to 9000. For my setup I have 2 nics on each host ...
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2answers
187 views

How can I configure each Windows user to have unique ip address

We have multiple Windows users on a single Windows 2008 R2 server (Standard edition), say 10 users. We would like each user (or program running in that user session) to utilize a separate IP address ...
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63 views

After copying Xen DomU to another machine, all network config in Windows is lost

Background Our company have about 40 Xen domains installed on single server, installed and managed by suite of proprietary programs. Most of the virtual servers are managed by our customers, and we ...
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188 views

One Web Server Two NIC with Two Different Wan Network

I got one Web Server (IIS), MS windows server 2012 with two nic and want to connect this two nic to different ISP with different public ips address. I got totally seperate set of infrastructure of ...
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1answer
43 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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1answer
291 views

Intel NIC teaming or server 2012 R2?

I'd like to implement NIC teaming on one of my servers and would like to know if it's better to use the Intel NIC teaming from the drivers or to use the NIC teaming from Windows Server 2012 R2.
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1answer
136 views

Windows Server 2012 r2 standard with dual NIC + DHCP

Currently I have a physical host with Windows Server 2012 r2 standard installed and DHCP role enabled. In addition the physical host has two network interface cards. I am planing to connect the ...
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150 views

Disabling bypass mode on Intel NICs

I'm trying to install PFSense on some decommissioned firewall gear. I've installed PFSense just fine, except for the two NICs are stuck in bypass mode. I don't see any options in the BIOS to edit ...
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1answer
346 views

After making my VM highly available I get “Could not find Ethernet switch” error when trying to live migrate

I normally create new VMs from the Failover Cluster Manager GUI. But this time around I went a different route because I had to (due to time constraints and available resources at the time). For ...
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1answer
109 views

Windows Dual NIC - Will this setup cause an ip address conflict?

My company has three subnets total of which two subnets have the same set of ip addresses... 192.168.0.x. This has not been an issue before but we are going to establish a VPN connection between ...
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Cannot connect two different networks on rhel6 on 2 virtual NIC's

I have a RHEL6 machine on VMware with 2 Virtual NIC's. The output of the ip's and networks are as below: $ ip a|grep "inet" inet 192.168.17.128/24 brd 192.168.17.255 scope global eth0 inet ...
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123 views

nic configuration on a linux virtual machine (rackspace)

I am trying to check my nic speed and duplex setting on a vm I have at rackspace. It is centos 6.4. When I run: # ethtool eth0 Settings for eth0: Link detected: yes This is all I get back. ...
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129 views

Force local IP traffic to go through LAN WITHOUT ip address changes

I know there's some topics about forcing local IP trafic of a Linux machine to go through the LAN (over the network where a WireShark is captuting trafic) but all solutions implies IP address ...
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1answer
113 views

NIC seems slow, even on 100Mb/s full duplex [closed]

So I have a server running Centos 6 64bit with cPanel. It's set on eth0 running at 100MB/s full duplex. But, one particular server seems sluggish on its connectivity, despite server load being minimal ...
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1answer
3k views

Nic Teaming Windows Server 2012 R2 - No network connection

I have 2 100Mbps NIC cards installed into PCIe slots and connected each card to it's own desktop 8 port switch. My Settings: Mode: switch-independent Load Balancing: Dynamic / Address Hash VLAN: ...
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58 views

Linux: Same static IP configured for all NICs

I am shipping some servers out to remote colo sites. I want to configure them so at the other end any port can be lit-up and the boxes will be good to go. I had originally been planning on bonding ...
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3answers
142 views

Windows 7 sending all packets to one nic

I have windows 7 with two nics, one default gateway set on nic1, and no default gateway on nic2. Nics are on different subnets. Nic1 is on 192.168.1.0/24 subnet, and nic2 is on 10.60.194.0/28 network. ...