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

learn more… | top users | synonyms

2
votes
1answer
126 views

Virtual interfaces with different MAC addresses

I try to figure out how to set up two logical network interfaces (at one physical interface) with separate MAC addresses on a Linux machine. My first attempt was to use macvlan which seemed to work ...
1
vote
1answer
58 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) ...
3
votes
0answers
24 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 ...
3
votes
0answers
151 views

KVM NIC passthrough “device already in use”

I have a server with 2 NICs 01:00.0 Ethernet controller: Intel Corporation Ethernet Controller 10-Gigabit X540-AT2 (rev 01) 01:00.1 Ethernet controller: Intel Corporation Ethernet Controller ...
2
votes
0answers
112 views

What are the advantages NAPI before the IRQ Coalesce?

As known there are two approach to avoid some overheads of hardware interrupts in highload networks, when there are too many hardware interrupts, that switching to them takes too much time. It is very ...
2
votes
0answers
914 views

Cannot set 1G speed on 10G nic using ethtool

I have a linux server with 10G fibre nics: xyz@xyz48:~$ sudo ethtool p1p1 Settings for p1p1: Supported ports: [ FIBRE ] Supported link modes: 10000baseT/Full Supported pause frame use: ...
2
votes
0answers
241 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 ...
1
vote
0answers
29 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 ...
1
vote
0answers
118 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 ...
1
vote
0answers
57 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 ...
1
vote
0answers
261 views

How to force/fake linux eth0 in 'up' status even without cable connected?

One of my testing script is eth0 status related, when eth0 goes down(cable unplugged), the script exit, and i need to unplug and plug cable many times due to test needs. is there anyway can fake ...
1
vote
0answers
460 views

Missing NICs in a HP ProLiant DL380 G6 running RHEL 5.5 64-bit

I have 2 twin boxes HP ProLiant DL3680 G6 running RHEL 5.5 64-bit. In one of them, two network interfaces (eth2 and eth7) are missing, i.e., they are not available: # ifconfig eth2 eth2: error ...
1
vote
0answers
196 views

HP ConnectX cards identifying as ConnectX EN

I bought a lot of four HP branded ConnectX card on Ebay. The cards are : HP InfiniBand 4X DDR ConnectX PCI-E Gen2 Dual-Port HCA 483514-B2 My problem is that two out of four cards identify themselves ...
1
vote
0answers
3k views

vagrant fails to bring up additional adapter for centos vm using virtual box provider

this is in continuation of the question asked here about host only adapter on dhcp I upgraded to vagrant 1.6.3 and the updated Vagrantfile to following setting for multiple adapters # add additional ...
1
vote
0answers
388 views

Very high RX errors dropped and frame in eth1 interface

I'm seeing a NIC hang-up/crash on my server and every time i check ifconfig output, it gives me very high errors, dropped and frame: $ ifconfig eth1 eth1 Link encap:Ethernet HWaddr ...
1
vote
0answers
385 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: ...
1
vote
0answers
399 views

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 ...
1
vote
0answers
1k 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 ...
1
vote
0answers
485 views

Intel PRO/1000 PT LP Jumbo Frames in Ubuntu 12.04 LTS

I am having issues getting jumbo frames enabled in Ubuntu using an Intel PRO/1000 PT LP NIC with two bonded 1Gb lines. Following the readme that comes with the Linux driver, Ubuntu will not allow me ...
1
vote
0answers
151 views

Multiple NICs config, disconnecting eth0 disconnects all other interfaces

Good Day, I'm using hardware that streams data, it has 4 Lan ports and is running Linux 2.6.23. I've run into some strange behavior with ARP tables reporting multiple IP addresses to single MAC ...
1
vote
0answers
152 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 ...
1
vote
0answers
542 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 ...
0
votes
0answers
10 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 ...
0
votes
0answers
18 views
+50

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 ...
0
votes
0answers
21 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: ...
0
votes
0answers
32 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 ...
0
votes
0answers
22 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 ...
0
votes
0answers
24 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 ...
0
votes
0answers
4 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 ...
0
votes
0answers
57 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 ...
0
votes
0answers
54 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 ...
0
votes
0answers
34 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. ...
0
votes
0answers
17 views

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 ...
0
votes
0answers
106 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 ...
0
votes
0answers
334 views

Route Traffic For Specific IP Range Through Specific Network Interface

On Ubuntu 14.04. I need to route the traffic to specific IP ranges though a specific interface. route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref ...
0
votes
0answers
87 views

Make local subnet clients get redirected like public clients, when requesting a redirected outside port on the firewall

I have a server that also functions as a firewall for the 192.168.1.0/24 subnet via iptables. It also double as a VM Server. Both the VM's and the local machines share the subnet. The servers ...
0
votes
0answers
132 views

Network Interfaces Cards and rx_short_length_errors and Linux Kernel

My machine (Linux OS) is counting packets with wrong length, it is a huge environment (GW's, Routers, Switches...) , so I would like to understand how NIC's behaving with these packets. -Does NIC's ...
0
votes
0answers
157 views

HP NC364T on CentOS 7

i am trying to install a quad port network card (HP NC364T) into a machine I have running CentOS 7. The issue is that during boot, the OS hard crashes and reboots the machine. This is after all boot ...
0
votes
0answers
162 views

Does Ubuntu with Linux 3.5 having TX RX ring buffers or BQL

My linux uname -a command outputs: Linux Davinci001 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux So, does NICs with this Ubuntu machine is ...
0
votes
0answers
264 views

Linux router with multiple gateways and port forwarding

I want to use a Linux VM to act as several routers at once. I have multiple servers hosting different services and dedicated public IP for each of them. Super simplified setup example: Ubuntu ...
0
votes
0answers
52 views

Directory Listing Denied Message

Understand that this is the common error for a missing index.* in the location being pointed to by Apache, however I know it to be the case that there is an index.php in the location specified as the ...
0
votes
0answers
340 views

adding a 2nd network card to linux

I'm on linux mint. I've just installed a PCIe gigabit network card (from eBay!) into my linux machine. I've already had to follow this guy's instructions to get the onboard NIC working correctly. I ...
0
votes
0answers
3k views

Issue with Intel i350 NIC

We are frequently facing an issue where one of the network interface(Intel Ethernet Controller i350) goes down often with the kernel log having some call trace and an error saying: [202323.307358] ...
0
votes
0answers
65 views

Two network interfaces access from the third subnet

I faced the following problem. There is server (Ubuntu 12.04) with two NIC that have IPs 192.168.40.147 (eth0) in 192.168.40.128/27 subnet and 192.168.40.165 (eth1) in 192.168.40.160/27 subnet. Now we ...
0
votes
0answers
264 views

Unexplained Packets being dropped

I have two servers one sending large amounts of data to the other, we are noticing that one server is sending data to the other but the receiving server is missing some of the data or packets. I am ...
0
votes
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 ...
0
votes
0answers
710 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 ...
0
votes
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 ...
0
votes
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 ...
-1
votes
0answers
19 views

How do I force specific interface to use different driver in RHEL?

We have Dell Poweredge 630 server which has 2 NIC Interface. We bought Intel's FTLX85.. module for those 10Gbit ethernets. 2 interfaces were using bnx2x driver of Broadcom. I installed Intel's ixgbe ...