Fiber (Fibre) generally refers to optical fiber, a very thin, flexible glass strand which is used for the transmission of optical signals in high performance networks.

learn more… | top users | synonyms (2)

10
votes
5answers
286 views

connecting remote site via fiber: layer 2 vlans or layer 3 routing?

Greets all, Back in the old days, when you had two geographically separated sites, links were pretty constricted so we put routers on them and, well, 'routed' between ip subnets-per-site. That was ...
0
votes
1answer
34 views

Optical modules, fiber and cables for 10 GbE short range connectivity (brands, latency) [closed]

I'm looking to run 10 GbE over lengths of 5-25m for a research lab and have been shopping for the appropriate optics. I'm guessing a mix of copper direct-attach cables and OM3, OM4, LC/LC multimode ...
5
votes
3answers
524 views

Can internet gateways be plugged straight into a layer 2 switch?

tl;dr Internet gateways (eg., cable modems, fiber optic gateways) don't function properly when they aren't behind a device with "layer 3" or routing capabilities, correct? Incredibly long backstory ...
1
vote
0answers
21 views

On a Cisco MDS, when decomissioning a switch, how do I change the “seed” switch?

How do I change the seed switch of an ISL? I'm decommissioning an old switch in our network.
4
votes
1answer
113 views

Is it possible to measure HBA throughput using Perfmon on Windows Server 2008 R2?

I have a server with two round-robin 4GB HBAs to a fiber switch and was wondering if I can measure activity/throughput on these HBAs using Perfmon? If so, which counters would I use? I initially ...
0
votes
0answers
33 views

Fibre card to switch (mini-Gbic)

I have a server with a fibre card in it which I want to connect to my 24 port procurve switch. The 10G 2 port fibre card supports fiber transceivers supporting SR, LR, LRM. The switch has two ports ...
2
votes
2answers
130 views

ip over fiber channel for faster LAN

Is it possible to set up a fast LAN using HBA's and a fibre switch? I have a brocade 200e and several emulex LP1150 pcie 4GB cards. Information regarding IP over fiber channel is difficult to find. I ...
1
vote
1answer
40 views

Can't view properties of an hba in vSphere 5.5

Why can't I view the properites of this HBA in vSphere?
-1
votes
1answer
47 views

Fiber OM1 to OM3 Convertor [closed]

I'm looking for a converter to convert OM1 Fiber cables to OM3 and i've searched and searched and so far i've been unable to find anything. Would anyone know where to get one of these convertors, ...
0
votes
0answers
62 views

Using EMC DAEs standalone

I've got a number of EMC DAEs filled with drives, for free. I'd love to use them, as they total to around 30TB, with possibly more available from the same recycling facility. As of right now I can ...
1
vote
1answer
82 views

PPP or Ethernet for fiber-optic link?

Since I have been doing a lot of IP camera jobs lately, it was only a matter of time that something really long-distance, more than can be covered with cat5e/cat6 cable, would come up. My current ...
0
votes
1answer
253 views

Fibre Channel Link Aggregation

quick question. Is there a Port-Channel/EtherChannel Link Aggregation equivalent for Fibre Channel? Is it possible to aggregate FC Links for High Availability? For instance if I have two Fabrics and I ...
-1
votes
1answer
67 views

Dell PowerEdge r710 figuring how to test my Power Connect 6224 Fiber Ports [closed]

Hi i have been trying to figure out why i cannot view my power connect via fiber. I have connected it to my fiber card not sure what card it is at the moment but besides the point all im trying to do ...
-1
votes
1answer
87 views

New Fiber Installation Resulting in Slow Download Speeds [closed]

TWC 80Mbps Cisco ASA 5510 (MTU 1500) Download speeds on my Windows and Mac machines are ~200KB/sec. If I use a download manager that opens 20 concurrent connections I can hit the full 8MB/sec. I ...
2
votes
2answers
147 views

How do fiber Ethernet transmitters set their power output?

I've noticed that fiber-optic SFP modules from Cisco and the like often specify a range of power outputs, such as -3 to -9 dBm. What determines the actual power output we should expect to see from ...
0
votes
2answers
124 views

Cisco SFP for single-strand single mode connection over 10km

Is it possible using only Cisco equipment to link two sites approximately 15km apart using only one single mode fiber strand.
0
votes
5answers
1k views

New office cabling: should we use CAT7 or CAT6a? [closed]

We are going to do the cabling in our new office building and we are thinking to lay down 10Gbit cables since we use HP switches that come with 10Gbit ethernet ports. We will also lay down few fiber ...
2
votes
3answers
149 views

Gigabit switches

We currently in our office have a 20 Mbps fiber optic internet connection with Time Warner. We decided to upgrade our connection to 100Mbps. When the technicians came out, they upgraded the circuit ...
4
votes
2answers
495 views

Is there a GBIC that supports Multi-mode and Single-mode fiber?

I was having a discussion with a friend of mine about fiber and he said that he has GBICs that support both Single-mode and Multi-mode fiber in the same device. At first I thought, no way, that can't ...
0
votes
1answer
51 views

fiber networking: making sure I understand

Im costing out a network in a building that has multi-mode fiber already available. It's entirely unused and requires switching in multiple locations to make a working system. I want to make sure ...
6
votes
2answers
532 views

What kind of cable is this?

I need to cost out some switching and figure out how to network a PC to this type of network. Clarifying: This is to connect units in a high rise facility. Each unit has the top picture in a ...
4
votes
1answer
135 views

Solaris crossover via fiber

I have two Sun servers running Solaris 10. Both have Emulex fiber channel cards. I'd like to connect the two in a "crossover" fashion like you would copper ethernet & IPv4. Point being I have a ...
1
vote
2answers
270 views

Multipath performing very poorly RHEL/HSV200

I'm running a RHEL 5.5 with multipath@HSV200 storage system. The disk performance for write is VERY poor comparing to Windows-system counterparts (which are using the same storage and multipath). ...
1
vote
3answers
254 views

Netgear managed switches - Fiber ports ( does it work without them? )

Silly question but cannot get my head around it. Netgear managed switches all seem to come with Fiber uplink ports these days. I'm thinking about getting on of these: ...
1
vote
0answers
112 views

SMC Tigerswitch and HP Procurve wouldn't connect with fiber

the first thing that I don't understand is why the SMC switch considers the pair of single mode fibers as one port,one link, but the HP switch sees the two fibers as two ports. when I wanted to ...
1
vote
0answers
172 views

Solaris x86 11.1 and qlt driver — only 3/4 ports attach

I'm using the QLogic QLE2564 4-port 8Gb HBA. The problem I have is that when I attach the qlt target mode driver to the card, only 3/4 ports attach the driver. ffffc10006854e58 pciex1077,2532, ...
2
votes
2answers
82 views

Can PRI be ran along side browser/VPN data on a Fiber Line?

Our business is looking to have a fiber line installed in place of our current set up of 3 T1 lines and a DSL line. Before I can eliminate all of the T1 lines, I need to know if the PRI, that I have ...
4
votes
2answers
522 views

Connecting Fiber interfaces on Cisco switches

I'm trying to replace an old Cisco Catalyst 2950 with a new Cisco 3750X. Unfortunately, these SFP's are so expensive, I'm trying to work with what I've got. Please note the diagram to see what ...
1
vote
1answer
195 views

Fiber Channel adapter statistics Linux

Anyone know how to get Fiber Channel adapter performance statistics out of Linux? I.E throughput.
1
vote
0answers
246 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
1answer
93 views

Pulling Fiber Optic Cable

Someone who has a lot of experience with fiber optic cable told me that somehow the cable needs to be pushed through conduits rather than pulled like I would with a Cat 6. Is this true? If so, what is ...
11
votes
4answers
690 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 ...
12
votes
2answers
429 views

Two identical fiber optic broadband lines working as one

I am looking for a way I could combine two 100Mbit fiber optic lines into a single connection for our office. I assume it involves some Cisco learning or something similar. Do I need to configure ...
0
votes
1answer
103 views

Mixing and choosing CWDM and DWDM parts [closed]

I have been looking at the page "Cisco Enhanced Wavelength Division Multiplexing Product Line", on Cisco's web site. I would like to light up some dark fibre for at least 2x 10Gbps Ethernet links. ...
5
votes
2answers
292 views

Protection while working with fiber optics?

As it's dangerous to accidently look in a fiber optics, what does one normally use as a protection to this while working with fiber optics? Are there safety glasses for such things? How is that ...
3
votes
2answers
436 views

8Gb Fiber Channcel HBA vs. 10 Gb SPF+ Converged HBA

I am putting a Dell server together, more specifically R720. I have to select the correct Host Bus Adapter. This HBA on R710 will connect to a storage device. I am confused between these two: QLogic ...
2
votes
3answers
228 views

OM1 and OM3 Fiber Questions

We are looking to install OM3 fiber to get a through put of 10 gig throughout our facility. I am looking at a chart and it states that the OM3 (50/125) which I am guessing is multi-mode fiber can ...
6
votes
3answers
413 views

Mixing SFP's with different speeds

I need to install new SFP's in a location; however, I need them to connect to existing switches and I'm not sure what SFP type they are. All I know is I've got MM Fiber. If I installed Cisco ...
1
vote
0answers
450 views

Newly Resized Luns not Showing correct LUN Size RHel 5.3

My linux servers are not showing their newly resized fibre Luns after being extended on the fly(online).the storage guys have successfully resized the LUNS from 1Tb to 2 Tb .We are running fibre SAN ...
3
votes
2answers
298 views

Brocade 200E Switch - Fibre Channel

What I have: Fujitsu-Siemens PRIMERGY BX600 Brocade 200E (16 port, 4gbit fibre). My question: Imagine a QNAP with a fiber 10GBIT card connected to the Brocade 200E (16 port, 4gbit fibre). Would ...
1
vote
1answer
386 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
3answers
861 views

Fibre (Fiber) Optic - Mixing SFP's and Switches

My generic question is: Can you mix switches on the opposite sides of a fibre link, or more accurately different manufactuors tranceivers. We just bought several new HP ProCurve v1810 series switches ...
4
votes
1answer
433 views

Will 10GBASE-LR work if 10GBASE-LRM used to work on the same cable link?

We have got some old 62.5um single-mode fiber links in our building. Network people told me, that Cisco 10GBASE-LRM with Cisco mode conditioning patch cables works fine on those cables and provides a ...
0
votes
2answers
98 views

need more information on a “10 gb bidi”

We have a 10 gb fiber run between 2 buildings about a mile apart and will not be able to purchase any more fiber. I was told I could use four "10 gigabit bidi's" to allow 2 separate ethernet ...
2
votes
2answers
168 views

What type of fiber do I need for a WS-G5484

I have bought two WS-2948G switches from cisco for a lab. I now need to buy two additional modules for them WS-G5484. I've never worked with fiber so I was wondering if there are differences in fiber ...
1
vote
0answers
120 views

I need help setting up my Cisco SG-200 and SignaMax 065-1100 MM fiber link

I replaced a broken SignaMax switch with built-in fiber connectors with a Cisco SG-200 unit and a GLC-GE-100FX mini-GBIC. The other end of the run is using a SignaMax 065-1100 media converter and I ...
0
votes
1answer
672 views

2 x Netgear GS724T (Dual GBIC) trunking issue

I have the following: Netgear GS724T (Firmware Version V1.0.3_35, Protocol Version - 2.001.002) 4 x Indineon ISFP GBR/FC Settings STP Function - Enabled Fast Link - Enabled Trunking port 23,24, ...
2
votes
4answers
553 views

Trunk fiber ports on switches

We are planning to purchase new switches for our network. We have three buildings in the same area that are all connected by fiber. Our main building is very large and needs to be connected by fiber ...
4
votes
1answer
530 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 ...
4
votes
1answer
2k views

New Fiber Optic Internet Connection, want to use Sonicwall TZ200 as main router, WAN/VLAN

Key Facts: We have a new internet connection with Movistar. It is a 100/10 Mbit line. We want to use the TZ200 as our main router. The Fiber Optic router is a ONT I240 The internet router that ...