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.

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Does water damage a fiber optic / cat5 cable

One of the buildings I support recently had an adventure with a broken fire sprinkler. Lots of water everywhere. One of the "drains" the water used was the vertical risers between network closets. ...
12
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2answers
446 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 ...
11
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4answers
720 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 ...
10
votes
7answers
909 views

10 gigabit networks: Decieding between fiber and twisted pair

With a green field installation 10gbps network (no legacy equipment to support), why would one select one physical medium over the other? If left to impulse, I'd probably go with fiber optics over ...
10
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5answers
409 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 ...
9
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6answers
3k views

Direct ethernet link between two servers

Say I had two servers which needed super-low latency (Database, file etc.). Would it be possible to directly connect the two servers with 10GbE, so each server had 1 (in the real world it would have ...
7
votes
9answers
3k views

LAN Between Buildings

Right now I have two buildings across the street from one another that both have typical consumer aDSL connections (something like 12 Mbs down/1 Mbs up). When I need to access resources on the other ...
7
votes
1answer
411 views

How brittle are fiber cables?

I need to move some fiber patch cables. As they are "special" compared to cat5, I am hesitant to be anything but very careful when moving them. How durable are fiber patch cable? Can I treat it like ...
7
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3answers
279 views

Can gigabit media converters affect performance?

We are looking to upgrade our network infrastructure. We have fiber between our IDFs and our MDF but have found fiber core switches to be significantly more expensive than copper. If we were to have a ...
6
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2answers
537 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 ...
6
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2answers
1k views

Is 10Gbps fiber (aqua or teal clad) backwards compatible with 4Gbps/8Gbps (normally orange clad fiber) FC equipment?

Just like the subject says. I've got a mess of FC hardware in a rack that I'd like to replace the cabling on. Looking at Monoprice I see that LC/LC cables are really close in price between 10Gb and ...
6
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3answers
452 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 ...
6
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2answers
302 views

If fiber runs 1gig fine, are there any concerns when considering upgrading to 10gig transceivers?

We had fiber installed (connecting ~10 buildings) around 5 years ago and it has been working great. The initial setup involved Procurve 2848 and 2824 switches w/ 1gig transceivers. However, lately we ...
6
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1answer
3k views

Upgrading from 100BASE-FX to 1000BASE-SX fiber?

I've been trying to upgrade our small fiber network from 100BASE-FX to 1000BASE-SX. The cables are 62.5/125 multimode fibers, all terminated in patch panels with ST plugs (the round ones). As I ...
5
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3answers
668 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 ...
5
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2answers
265 views

Small Scale Point-to-Point Fibre optics

I'm faced with a bit of a dilemma with regards to stretching a 100base-T network from building to building. The site is a racetrack (cars) with a control tower, housing race control, admin and a ...
5
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1answer
349 views

What kind of fiber is used in Intercontinental connections? Are repeaters used?

I'm curious about the underwater Internet infrastructure that interconnects continents to each other. Can anyone elaborate on how it works, or any other details (such as security) of these wires?
5
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2answers
314 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 ...
5
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3answers
730 views

fiber to the desktop - which connector

in putting together a new installation, one of the requirements is that we use fiber to the desktop. we are going to use multimode, but im not sure which connector. is there a material (ie cost) ...
4
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1answer
571 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
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4answers
677 views

Are there solutions that can combine gigabit ethernet, 10gig ethernet, and fiber channel in a single device?

We currently have Brocade 200E fiber switches, connecting 2 EMC CLARiiONs to 4 VMware ESXi hosts. We are looking into new storage options using iSCSI with our existing ethernet network, including the ...
4
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2answers
859 views

Network cabling Tips

I'm looking for some useful information about how to design network cabling for a building. I'm not so much interested in wiring standards such as 568A, but more interested in physically wiring the ...
4
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2answers
596 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 ...
4
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7answers
292 views

business-class fiber to the home [closed]

Suppose you're some sort of crazy nerd fellow and you live in an area that's absolutely covered in fiber optics and network facilities. What kind of cost / infrastructure would be needed to hook in ...
4
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1answer
222 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 ...
4
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2answers
480 views

Nagios: Only send notification when all 4 host are down

As part of a larger complex, is a small office building with 4 computers. It has a single cat5 run to a non-managed switch that has 4 computers connected to it. Since I can't ping the switch, the ...
4
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1answer
226 views

Terminating multi-mode fiber

I'm looking at the feasibility of terminating multi-mode fiber connections ourselves. We would be using LC connectors. I've done some research and found two different methods. One requires ...
4
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2answers
612 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 ...
4
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1answer
146 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 ...
4
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1answer
291 views

Fibre Optic Cabling - Where to start?

I'm a sysadmin/developer that works for a small IT company. We are having a new office building built, and we have a limited time window in which to put in the core infrastructure network cabling that ...
4
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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 ...
4
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1answer
489 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 ...
3
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2answers
540 views

Are transceivers hot swappable?

Are transceivers in general hot swappable, and if not, how do I find out if these are? Using these adapters 665243-B21, HP Ethernet 10Gb 2-port 560FLR-SFP+ 665249-B21, HP Ethernet 10Gb 2-port ...
3
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2answers
233 views

Extending a coax cable with a fiber optic segment

A lightning strike recently hit a client's cable TV and internet source (a typical RG-6 coax run from the street to the building). It fried all the networking equipment: modem, router, switches. It ...
3
votes
2answers
503 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 ...
3
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6answers
1k views

Are there any vendors making a Gigabit Fiber solution for laptops?

I'm trying to build a laptop system that can connect to just about any network you might come across in a large enterprise. I realize I can use a media converter to go from twisted pair to fiber but ...
3
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2answers
333 views

Fiber Channel SAN hooked up to 2 ESXi Hosts

I have a PowerVault with 4 FC modules at 8gb/s. I don't want to jack the SAN into our 10/100/1000 switch because of the max 1gb/s speed. My question is can I jack both ESXi host's FC into the SAN's ...
3
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3answers
5k views

50um vs. 62.5um fiber compatability

I've heard that there are compatibility problems when using 50um fiber with some fiber converters. After some research I'm thinking this is a legacy issue when using slower devices (100 Base FX) that ...
3
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4answers
2k views

What are the advantages/disadvantages for using a single strand of fiber for a full-duplex link?

I have seen telcos install one-strand fiber links at full-duplex, but haven't found much documentation about this configuration. What are the bandwidth limitations, troubleshooting complications, ...
3
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2answers
317 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 ...
3
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2answers
146 views

Increasing speed between buildings above 1Gbps

I am looking for options to increase the speed between buildings, ideally without having to replace existing fiber. Current situation: Multi-building campus, with Gbps fiber links between ...
3
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2answers
5k views

CX4/SFP+ -> Fiber adapters?

I'm putting together a proposal for a greenfield 10GigE network (including 10GigE uplinks to providers) while trying to be careful about budget. One of the hardware configurations I'm evaluating that ...
2
votes
4answers
3k views

Fiber Optic Cable not working

Basically I am having a problem with a fiber optic cable connecting 2 switches not working, hired a professional to help fix it and in the end it is still not working. I need someone to look over ...
2
votes
4answers
661 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 ...
2
votes
2answers
83 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 ...
2
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3answers
478 views

replacing an ethernet backbone with fibre optic

I live and work in a building that is nearly 20 years old. My Internet connection is in the cellar along with my servers and has a nominal rating of 100 MBit. I have a gigabit switch in the cellar ...
2
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4answers
253 views

how to patch vertical fiber run

if one has a run of singlemode fiber terminated in a patch panel, how would you then connect it over to a device? singlemode patch? it was my understanding that singlemode had minimum refraction ...
2
votes
2answers
154 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 ...
2
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3answers
164 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 ...
2
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2answers
205 views

Is fiber neworking as easy as getting a switch and a NIC?

I have a handful of servers at home and I am wondering how feasible it is to network them together using fiber optic. Is it as simple as getting a fiber switch on ebay, and getting fiber NICs for ...