Ethernet at 1000 Mb/s (1 Gb/s). Can be over copper or fiber. There are different types of fiber.
0
votes
1answer
45 views
Gbps to 2 100Mbps clients
If I have a media server with a gigabit NIC connected to two 100Mbps xboxes on a gigabit switch, will both receive from it at 100Mbps or will one connection put the server's NIC in a 100Mbps mode and ...
0
votes
1answer
46 views
Debian Dmesg Error - What does this output mean regarding an outage on eth1?
The tale of the NIC that quit;
I have chucked the end of dmesg output from a server into pastebin;
This server (PowerEdge 1850) has two NICs, eth0 and eth1. eth1 has a couple of VLANs defined on it, ...
1
vote
2answers
107 views
ethernet cable is connected but It shows unplugged [closed]
I told datacenter too connect two of my servers with a crossover cable to each other. But when I try this command
ethtool eth0
Settings for eth0:
Supported ports: [ TP ]
Supported ...
0
votes
1answer
36 views
What is a reasonable latency time for mpdringtest with gigabit ethernet?
Hi I have a small test network that I'm using to do some number crunching for my dissertation. My network consists of three machines with intel gigabit network cards (all em drivers with two hosts ...
0
votes
1answer
100 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 ...
2
votes
0answers
335 views
Issue with Netgear GS108T Managed Switch and Jumbo Frames
I recently purchased a Netgear GS108T managed switch and I am trying to configure jumbo packets between my NAS (Thecus N4100Pro), PC and managed switch. I should mention the fact that I was able to ...
0
votes
0answers
20 views
Ethernet connectivity issues on Intel SR1435VP2 Server System
I currently am running two Intel SR1435VP2 Server Platform units in my dorm. Both successfully boot with Ubuntu Server 12.04, 32 bit. However, one of the units is having a issue with Ethernet in ...
1
vote
2answers
69 views
Cisco sg100-08 connections
I have multiple computers, some have a 10/100 ethernet adapter while others have a 10/100/1000 ones. If I connect them together with the Cisco sg100-08 switch, do I keep the 1Gbit speed where possible ...
1
vote
1answer
145 views
Why cant I transfer files from my desktop to my server at full speed?
I have a desktop computer with two SSD's in RAID 0 with a read/write speed of 950 MB/sec (7.6 Gbps) and I have a server with 6 HDD's in RAID 5 (read/write speeds of 200 MB/sec or 1.6 Gbps) acting as a ...
1
vote
0answers
190 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 ...
11
votes
4answers
623 views
Long Gigabit Ethernet Run
I am trying to get an Gig-E network between two buildings that are approximately 260 ft. away. While some TRENDnet switches failed to be able to connect to each other over Cat 6 at that distance, two ...
1
vote
1answer
299 views
Gigabit Ethernet on 200 mbit/s speed - why?
Today I tried to connect two laptop computers, both having Gigabit Ethernet NICs, both with Windows 7, with straight cable cat 5e. The cable is ca 50 cm long so the category 5e should be enough.
I've ...
13
votes
1answer
820 views
What am I misunderstanding about calculating MTU?
Okay, I just finished resolving a jumbo frames issue between a few Xserves, a Netgear GSM7224, and a Drobo B800i. It turned out that the Xserves (Mac OS X 10.6.8 Server) and the Drobo B800i accept the ...
1
vote
1answer
261 views
Is 1000 Base SX fiber multimode (850nm) backwards compatible with 100 Base Sx fiber multimode (850nm)?
Is 1000 Base SX fiber multimode (850nm) interface backwards compatible with 100 Base Sx fiber multimode (850nm) interface?
1
vote
1answer
2k views
Max distance for cat5e in 1000Mbps / 1 Gigabit
What is the max distance for cat5e cables in 1000Mbps (1 Gigabit) Full Duplex mode?
-3
votes
1answer
349 views
'Gigabit' Ethernet Port Tester? [closed]
A quick google search shows there seems to only exist handheld testers for 10/100 Ethernet ports. Any ideas why that is and where we could find one that works with a Gigabit LAN? Perhaps the 10/100 ...
1
vote
1answer
155 views
Performance issues with self-built NAS
I set up a little NAS system for my personal use. It's an Ubuntu system running on a fan-less Atom-powered mini ATX mainboard which I extended with a usb3 pci card to get best possible performance for ...
3
votes
3answers
133 views
What could cause two devices to refuse to link?
This is a curious case where all the devices at hand will link with one another, except for two that just won't detect one another. One device is a single board computer (SBC) with a gigabit nic, the ...
2
votes
1answer
123 views
Is it possible/likely for a faulty network card (gigabit ethernet) to crash your consumer-grade router?
After much messing around with what appeared to be 4 faulty routers in a row I realized that I can reproduce causing my DLINK DIR-655 router to freeze up and require a hard reboot (to factory ...
0
votes
1answer
80 views
PCI Extender and 1GB Ethernet Performance
One of my server has 2 PCI slots which has already plugged with 1GB Ethernet cards. I want to add two more 1GB NIC to this server. I've found on ebay this pci extender.
I want to ask, because I ...
3
votes
1answer
438 views
1000 Mbit/s fiber switch to 100 Mbit/s fiber switch - no communication
This morning, I troubleshooted a fiber connection between two switches in the same building. It was a single-mode fiber. I knew this fiber was fine, because I had installed it myself and tested (with ...
3
votes
1answer
5k views
Can't set up NIC to establish Gigabit link on Linux
I have Ubuntu 11.10 64 bits with one (actually two, but only one is connected) Intel 82578 Gigabit Network Card which is working on 100 Mbps and I want it to work on 1000 Mbps, but I can't. How can I ...
1
vote
1answer
326 views
2 NIC's are not loading by the Ubuntu Server
I have a Server with 5 NIC's.
And I have just installed Ubuntu Server 11.10 64 bit fully dist-upgraded by now (31 Jan)
3 NIC's are identical PCI-Express x4 adapters.
1 is integrated TG3
and the last ...
0
votes
4answers
1k views
Having an issue trying to get Gigabit speed across my network (Ubuntu Server)
I've just started looking into the network speeds at my office, the entire network is setup to be "Gigabit". This includes Gb switches, Gb Network cards and Cat 5e cabling.
I'm not expecting the full ...
1
vote
1answer
3k views
ZFS and FreeNAS Performance
I have just set up an HP Micro Server N40L as a FreeNAS with 4 2tb drives in a RAIDZ. I am getting around 30-40MB/sec, with occasional bursts of 50MB/sec., reads and writes that are similar to the low ...
1
vote
3answers
577 views
Cascading gigabit switch (10/100/1000) with fast ethernet switch (10/100)
I'm a newbie in networking. I have this question in mind lately. I bought a gigabit switch and tried to cascade it with my existing fast ethernet router and switch. I have 1 server which is connected ...
0
votes
1answer
457 views
Recommend a nice managed Top Of Rack switch for Linux Computer Cluster (but it has to be cheap!) [closed]
I work at an industrial research lab, and we have a research group that's building up a Linux-based compute cluster. The have about 46 nodes so far, with more to come. They came to us a few months ago ...
1
vote
3answers
360 views
Disable gigabit ethernet throttling?
I've got two windows PCs connected by gigabit ethernet.
When I use iperf to measure throughput it maxes out at a good 100MBit/s.
When I run iperf using two or three parallel connections, each will ...
0
votes
1answer
97 views
Web server to DB server connection speed [closed]
we are designing a cluster of 2xnginx, 2xapache, 2xmemcache, 2xmysql servers for a high traffic web site.
Current web site runs on 1 dedicated web server and 1 dedicated db server.
the current web ...
2
votes
3answers
1k views
iSCSI Transfer Rate Using Standard Gigabit Networking
We just purchased a dell storage server with (12) 7200 RPM SATA drives running RAID 10 and (4) gigabit network interface cards. Additionally it has a PERC H700 controller card with 512MB of on-board ...
2
votes
5answers
345 views
Cisco 3750 Gigabit ports
I'm looking for Cisco switches that provide 48 Gigabit ports.
I've been through this list : CISCO PRODUCT REFERENCE and this one: DETAIL 3750 SWITCHES
But there's something I don't understand:
...
1
vote
1answer
2k views
Best practice to trunk two GB switches?
I already read some similar questions but I still have no clue on how to do it the right way. I have a D-Link DGS-1248T 48 port GB-switch with 4 mini GBIC ports and I want to connect it to another ...
0
votes
2answers
328 views
Link Aggregation And Jumbo Frames configured but not working
I have a netgear GS110TP smart POE switch which is connected to a dual port INTEL PRO/1000PT with static link aggregation configured on the switch and PC side.
The network card and switch recognize ...
6
votes
1answer
392 views
What is theoretical maximum of TCP traffic over GigaEthernet?
What is theoretical maximum of TCP traffic over GigaEthernet ?
1
vote
2answers
626 views
Slow network transfer on gigabit between Win7 and Unbuntu Samba (26 MB/s)
I have slow network transfer speed (26 MB/s). The beginning of the transfer started at 120 MB/s and dropped down every second.
I am transferring a 350 GB file from an E-Sata (7200rpm) drive mounted ...
1
vote
2answers
286 views
Managed switch, what is the purpose of the two gigabit ports?
We have a managed switch that has been installed by phone engineers as part of our new IP phone system.
The switch in question is a Nortel 2550T-PWR
Ethernet Routing Switch 2550T-PWR with 24 ...
2
votes
4answers
735 views
Upgrade to gigabit - is it worth it?
We are running two servers with around 30 workstations as follows:
1 x UNIX Server
1 x HP Proliant Server - Windows Server 2008
30 x Windows XP Professional SP3
5 x Axel Thin Clients
16 x Avaya ...
2
votes
2answers
1k views
Will 100 Mbps client slow down 1000 Mbps network?
Newbie question:
We are planning to setup a LAN in our lab, and are looking at gigabit ethernet switches. A couple of our older computers have 100 Mbps ethernet, will they slow down the whole network ...
3
votes
1answer
746 views
Intel NIC: VMDc or VMDq?
I need to buy a nic that I want to eventually (~3 months) re-use for a VM server deployment that will need to support heavy network I/O. Server is a Xeon Gulftown/Westmere-EP.
Intel has server NICs ...
0
votes
4answers
219 views
LAN speeds and firewall/switch connections
I have a small network with about ten users. All workstations flow into a Dell PowerConnect 3424 which then has a single link to a SonicWALL firewall and from there to a cable modem. More important ...
3
votes
4answers
852 views
Ethernet switch capacity question
We're looking at hooking up 48 small embedded systems with 10/100 Ethernet ports to an Ethernet switch and then have that switch talk to a server upstream via a faster connection. I have a couple of ...
2
votes
1answer
149 views
What percentage of its capacity should I aim to run a network at?
First of all, apologies if this is the wrong StackExchange site for this question - it's about Ethernet network capacities, but not specifically about servers etc.
I am designing a network for a data ...
6
votes
3answers
5k views
Gigabit ethernet generally faster than Firewire 800?
If I want to transfer a large file between two computers, which are connected via LAN, would going through the network (setup as gigabit ethernet) be faster than using a direct Firewire 800 connection ...
0
votes
3answers
162 views
How to maximise performance in computers connected into LAN via Gigabit ethernet router?
Our group is setting up a server (which might just be a NAS, but we're not sure yet), which shares files, so that it connects to all other computers in the room (about 10 of them). I am thinking just ...
2
votes
3answers
799 views
linux router/firewall device with gigabit ports
i am looking for x86 or arm based device to use as linux router/firewall. It schould have
2 or more gigabit ethernet ports
enough processing power to filter a gigabit of traffic
about 512 MB of RAM
...
6
votes
3answers
820 views
So what really makes a server grade NIC?
We have a couple servers hosting Citrix VM's. We are planning on adding SAN storage to our network so that we can do the quick migration and high availability thing. The question comes up with ...
3
votes
4answers
415 views
SAN over Ethernet
We are looking to move our infrastructure from our office to a COLO.
Currently we run a rack-mount white-box server using commodity hardware, and ESXi 4 as the hypervisor to power 9 VM's for internal ...
0
votes
2answers
855 views
Cisco SG300-28 vs Cisco/Linksys SRW2024 | Managed GB Switches
I'm trying to get a good managed Gigabit switch for our new 1/2 server rack, which will have about 6 servers within the next couple of months, plus firewall.
From a pricing standpoint, both of these ...
3
votes
3answers
159 views
Link mode on unmanaged gigabit switches
I have two RJ45 sockets connected by an inaccessible unknown-category twisted pair cable. I plug two unmanaged gigabit switches into the sockets using Cat6 cables, and they negotiate a 100Mbps link. I ...
6
votes
6answers
2k views
Windows 2008 Server on mixed ethernet speeds — download from share slow, but fast plain TCP
I have a Windows Server 2008 R2 x64 server that is AD controller and file server. I have a problem that Windows XP clients experience terribly slow (less than 10Mbps, really less than ...
