Questions tagged [10gbethernet]

10 gigabit per second version of Ethernet protocol, using either copper or fiber cables

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how to test 10G NIC in loopback for full throughput?

I am using 10G NIC x520-DA2 (which is x8 Lane) in windows 10 Enterprise 64 Bit on DELL Optiplex 7080 Tower with Intel Core i7-10700 . X520-DA is installed on PCie slot 2 of optiplex 7080 that is PCIe ...
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Use Core Switch as an L2 Access Switch

Can I use a CORE switch as an ACCESS Layer 2 switch? The end goal is to connect all servers through at least a 10Gb network. The servers each have high volumes of data that will be transferring back ...
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Why can I get on <1G on my 10G Network?

I have 4 CentOS 7 boxes with SuperMico 10000BaseT NICs plugged into a Netgear ProSafe XS712T switch with Cat8 cables. Switch is all default settings, but shows NICs at 10G Full. NICs are configured: ...
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Very slow write speed (NVME drive) on 10G network

Setting up an experimental lab cluster, the write speed for data received via 10G fiber connection is 10% of the local write speeds. Testing transfer speed between two identical machines; iperf3 shows ...
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Ethernet bond interface fails after NIC replacement

I've replaced a failing 10GbE adapter in a Dell PowerEdge server running a bonded pair of Cat6 cables to an aggregate switch. The old NIC and its replacement are both Intel Ethernet Controllers (10-...
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Getting 2g speeds on hyper-v VM through a 10g nic

I'm testing my speeds using IPERF as I've recently installed a 10G cisco switch and intel 10g NIC's on some servers to communicate with a nas server. I noticed my reads and write were awful so I've ...
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"Unsupported module type was detected" during boot of Intel X520/I350 card in Dell PowerEdge R630

I've purchased a Dell PowerEdge R630 with an integrated Intel X520/I350 (2x SFP + 2x RJ45) network card. I've setup the server locally (on a 1G RJ45 network) to test that everything worked as expected ...
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VMware ESXI - External PCI Ethernet Card [closed]

I have a beast of a home server and don’t fancy purchasing another device just to learn PFSense on my network. My server only has 1 Ethernet port, I have an external PCI card I bought off from amazon ...
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linux 10gbe ixgbe (intel X550T) slow at 420mbyte/s max, p2p lan cat8 1m, tried ethtool and ifconfig options to no avail

first time dealing with 10gbe. I have two boxes, one is older with i7 2.8ghz from 2009 generation, pcie 2.0 and I just put the Intel X550T there to make use of absolutely similar but builtin adapter ...
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HP NC523SFP no link detected

I have two HP NC523SFP 10Gb 2-port (1 on a HP DL380e Gen8 and the other on Dell PowerEdge 2950) both systems have Centos 7, the cards are detect and are running the same firmware. I have connected ...
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Can this router and motherboard connect via the LAN 10G Port?

So I am a bit confused :) I have this unit, which advertises a "10G Lan SFP+" port http://www.downloads.netgear.com/files/GDC/R9000/R9000_UM_EN.pdf And I am thinking of buying this motherboard ...
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Connect two local networks

I'm trying to connect two local networks together. Network 1 (192.168.1.1) is connected to 10GBe Internet via router with dhcp. I've added switch Netgear XS708T for more 10G ports (Clients 1 and 2). ...
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Why is there a difference in speed of forward and reverse traffic over 10 G network in iperf tool

I have a 10G network setup between my two servers (say, Server1 and Server2) and I'm using iperf tool to measure the bandwidth of the network. Here are test cases that I performed, Test Case 1: (...
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Windows Server 2016 Installation doesn't found Network adpter (Hard Drive Found!)

I have a just bought PowerEdge T640 server and i am trying to install Windows Server 2016 Standard. I have downloaded the Windows Server 2016 ISO and mount a bootable pendrive using Rufus. I boot the ...
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How is 10GBASE-T defined for providing compatibility?

Is there a common source for description (like for "data link layer" and might include electrical specification of "physical layer") of 10GBASE-T as standard for technical devices? Considering ...
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What transceiver can convert 10GBASE-KR or 10GBASE-KX4 to 10GBASE-T or 1000BASE-KX to 1GBASE-T? [closed]

A pci-e network card supports 1000BASE-KX, 10GBASE-KX4 and 10GBASE-KR on SFP connector, but the required mode for twisted pair support on RJ45 (8P8C connector) is 1G- or 10GBASE-T. What type of ...
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2 votes
1 answer
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10G SFP+ Synology NAS to SuperMicro X10

I'm trying to directly connect my Synology NAS to a SuperMicro X10 built PC: Synology DS1618+ 10Gtek MCX312B-XCCT PCIe NIC Using 10Gtek SFP-H10GB-CU1.5M DAC cable Supermicro X10SDV-8C-TLN4F+ mobo w/ ...
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Why is my data throughput only 1G of possible 10G if I setup an ethernet bridge?

My setup is a Windows 10 PC with 10G card (LR-LINK 6880BT) and a Synology DS1618+ NAS with 10G card (Synology E10G18-T1). Both 10G ports are connected directly to avoid buying a 10G switch. A) How ...
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Can you mix 10gb and Infiniband for iScsi storage target

I'm setting up a Fedora server to act as an iScsi storage target. The primary storage network will be 25gb Infiniband. Is it possible and/or safe to also allow the target to be accessed by 10gb ...
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Fastest solution to use FTP/Aspera/MediaShuttle with SAN network

At my postpro studio we have a SAN Network (Stornext 6). There is also a MediaShuttle and FTP server in a VM on the firewall (I know, I know... Not my fault, really xD). The VM is sharing SAN over ...
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6 votes
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Converter for RJ45 port to SFP+

2 of my servers have an Intel X552 network adapter that has 2x 10GbE RJ45 ports. All my other equipment is at least dual RJ45/SFP+. I'm looking at upgrading my core network to 10GbE and I'd like to ...
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Why am I only achieving 2.5Gbps over a 10Gbe direct connection between 2 machines?

I have 2 machines directly connected to each other with a 7 foot Cat6a ethernet cable (included in the box of the NIC cards). The PCIe x4 NIC I bought and in both machines is this: https://www.amazon....
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Intel x550 not negotiating to 10Gb

We have a machine with an Intel x550 and a Cisco Nexus N9K-C9372-PX-E. For whatever reason, it will only negotiate at 1Gb, even though it is 10Gb capable and is being plugged into a 10Gb switch. This ...
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What to expect from a 10Gbs fiber optic network of one server connected directly to 4 clients?

I have a fiber optic network of one server connected directly to 4 clients(they are not connected to each other) The network is suppose to support up to 4x10Gbs, so 10Gbs throughput from each client ...
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1 answer
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Direct attach sfp+ cables (passive) connection issues after power restoration

I have got two servers with SFP+ capable network cards connected to the Unifi Switch uplink ports. Each of the servers has its own UPS and the switch shares the UPS with one of the servers. The ...
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Serializing pcap file into 4B chunks [closed]

Given a previously generated pcap file, how do I serialize the data into 4B (or N byte) chunks. The format/protocol of the pcap data is not relevant here.
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What is a 4x 10gbe QSFP-QSFP cable?

I was looking for QSFP cables on Ebay and came across a Brocade 58-0000033-01 marked as 4x 10GE even though it has one QSFP connector on each end. I don't understand what this cable is for, will it ...
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Using non-FUJITSU 10Gb Ethernet Cards in FUJITSU servers

We are currently trying to upgrade old servers to 10Gb connections. The servers in question are: PRIMERGY RX200 S6 PRIMERGY RX300 S5 Our FUJITSU partner told us that there were no cards available by ...
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Network performance with an i7 6700 Skylake

We're looking into setting up multiple servers with Nginx; the estimated required capacity is 60 Gbps (six-zero gigabit per second) A nearby datacenter offers us servers with "i7-6700 Quad-Core ...
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4 votes
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Not sure I really get 10 Gbit between our servers on the 10 Gbit network

We have a 3 Unix (1 Ubuntu 2 Redhat) servers connected via their 10 Gbit network cards to a 10 Gbit switch (our IT person made sure we got the correct cables). We experience some odd behaviour when ...
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2 votes
3 answers
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How many "joins" allowed for 10GbE copper?

I wonder how many "jacks" are allowed for running copper (Cat6a and Cat7) link for 10GbE connections. Questions is pretty simple but I am confused about "link segment" term. From specification it ...
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ESXI, pfSense, 10gbE

Good day all! I will try and make this short and sweet. My current setup is: XS708T NETGEAR 10gbE switch ESXi Machine #1: 2x Intel 10gbE pfSense (VM) with WAN on one vSwitch, LAN on other vSwitch, ...
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How to connect MD3800i (iSCSI 10 GbE) to PowerConnect 8132F (SFP+ 10 GbE)

I want to connect a SAN (MD3800i) to a PowerConnect 8132F switch. Both support 10 Gbit Ethernet, but the 1st does it via iSCSI (RJ-45), while the second - via SFP+. Any adapter that could go in ...
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2 votes
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Dell X4012 copper options?

I've been using the Dell X4012 12x 10GbE switches with fibre and DAC cabling in several of our locations for a year now, and their lack of SFP+ ID checking made them easy to integrate. However, now I ...
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4 votes
2 answers
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Do 10GbE SFP transceivers need to match?

I'm looking to connect a Promise SanLink 10GbE SFP NIC to a Cisco 10GbE switch. My general question is whether the transceivers need to match. In other words, do I need to find a transceiver which is ...
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Will adaptive load balancing (ALB) link aggregation causes high cpu usage in a NAS?

I have a NAS which has 2 10Gbe ports, and it provides Adaptive Load Balancing (ALB) link aggregation function. By checking Wikipedia, it seems that in ALB, the bonding driver needs to go through ...
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Mellanox connectX-2 - compatibility

We want to upgrade our network to 10Gbits. On eBay you find a lot of old HP Mellanox connectX-2 SFP+ cards which are capable of 10Gbit/s. We want to give our server one of them and connect it to a HPE ...
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want to build a private 10 Gbps backplane [closed]

I intend to purchase, two servers each containing a Intel 82599 QSFP+ that the vendor says has "supports dual 10Gbe output via a splitter cable". Now I wanted to ideally connect the two servers and ...
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10GBase-T on Cat5e cabling

I accidently connected our new servers with our 10g switches using Cat5e S/FTP instead of Cat6a. Cablelength is 1 meter. There is a failover cluster running on the servers, without any traffic though (...
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How did 10gbe happen without increasing the number of wires in the cable? [closed]

The ethernet cable speed jump from 100Mb/s to 1Gb/s was possible because all of the wires were put to use in a patch cable. The jump from 1Gb/s to 10Gb/s required no such increase. How did they do ...
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LACP bandwidth of multiple connections from single fast link

Is there a way to get multiple TCP connections from the same IP/MAC to use all of the physical links in a LACP configuration? Here's my setup: The central switch (Meraki MS42P) has a 10GbE link to ...
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4 answers
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SFP+ to 10GbE RJ45

We have Intel x520 10Gb SFP+ network adapter. We have RJ45 network cables to connect to a 10GbE network. We have looked into direct attach cables and transceivers but we are struggling to find a ...
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1 answer
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Why the bandwidth is not ~10G?

I originally posted on "Network Engineering", but I was told to ask here. I have 2 servers connected with 10G cable between them directly. I need to know that the connection is good and it has indeed ...
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12 votes
2 answers
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10/20/40Gbps nginx large files caching webserver [20Gbps reached]

I would like to find out the best possible configuration/hardware to deliver 40Gbps from a single server in this question. Situation We have a video share proxy server that offloads peaks from slow ...
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1 vote
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How to connect a Juniper EX4500 to netapp X1107A

What is the best and not expensive way to connect a Juniper EX4500 to a X1107A Chelsio PCI Netapp card? Will these do (10GBASE-SR) for both end? and then connect with fiber cable? How important is it ...
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how to tell if NIC has multiqueue enabled?

Can anyone tell me what command i run to determine if my 10G NIC is running in single RX-TX queue mode or multiqueue? It looks like it only has 1 RX/TX queue according to cat /proc/interrupts root@...
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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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3 votes
0 answers
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SMB3 on centos fluctuating read/write speeds

I recently got two 10GbE cards and have been testing a SMB share from centos 6.4 with it as the SMB server. The SMB client end is a Mac and I don't seem to be maximizing the network speed because it ...
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1 vote
4 answers
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Direct connect 10GBE with fibre

I have two servers that I wish to direct connect with 10GBE. One server has an Oracle Sun 10GBE (Intel 82599) with dual SFP+ pluggable transceivers installed. The other has an HP 10GB MELLANOX ...
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10gb ethernet direct connection (no switch)

Im trying to connect 2 computers with 2 PCIe "Core 4 HP 671798-001 HP CX-2 NIC 1 PORT 10GB" I'm using a SFP+ Direct Attach Copper Cable (I think they are also called twinax) I found a similar ...
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