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Questions tagged [fiber]

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.

An optical fiber is a very thin, flexible glass strand that transmits light along its axis, by the process of total internal reflection.
There are two main classes of optical fibre used in telecommunications applications, Single-mode Fiber (SMF) and Multi-mode fiber (MMF)

Multi-mode Fiber is mostly used for communication over short distances, such as within a building or on a campus. Typical multimode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters.

Single mode fiber is used for communication over very long distances. It is not so common in the datacenter environment.

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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 connecting everything up. That gigabit switch has a…
Stephen Winnall
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Can i plug SFP Transceiver into SFP+ port?

I`m talking about DELL PowerConnect 6248 here. For Module 1 bay you can buy PowerConnect 6xxx SFP+ Module supports up to two SFPs (no SFPs included) Can i plug into these those Transceivers that are offered for front end SFP ports : SFP Optical…
Janis Veinbergs
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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, advantages and/or disadvantages for this kind of…
l0c0b0x
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How to get my fax modem to work with newer phone lines (and HylaFax)

For a long time I've been using a HylaFax server and an old external 56k serial port modem. It has worked great on our POTS lines. Recently we just upgraded our location and it now has an AT&T Fiber connection, and the telephone lines are all…
Daniel
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difference between expensive and off-brand SFP+ trancievers

We are looking for upgrade for our small 10G network, and for that we need to hook up computer via optical link to 8-port 10G Netgear XS508M switch (it's mostly copper RJ45 switch, but one port is RJ45/SFP+). Plan is to pop in PCIe card (Intel…
aaaaa says reinstate Monica
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Does changing vmware datastore multipathing policy disrupt connectivity

We have several VMware ESXi hosts accessing multiple datastore stored on a fiber channel SAN. We have found that some of the hosts are still set to "Most recently used" mode for their multipathing policy. I would like to change these remaining hosts…
James Edmonds
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VOIP T1 vs Fiber

Currently using a T1 (1.544Mbps) for what I think is pricey sum of 500 a month. Found I could get 30/30 fiber for about the same price. Would there be any downside to switching to fiber, I would think it's better, since we can merge VOIP with daily…
JustAGrump
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Does G.655 fiber supports 1310 nm wavelength?

I am using G.655 standard fiber for a project. We are using short haul SFP & long Haul SFP. Long haul (1550 nm) works fine with G.655 fiber, But Short haul SFP (1310 nm) is having some issue as link is not getting up. I am not sure whether the issue…
Vinay Singh
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SAN capable of 25,000 IOPS at 75kb avg. size, where will my bottleneck be?

I just want to double check my findings here, hope someone out there is able to weight in on some of this. Let's say I have a SSD storage array capable of delivering 25,200 IOPS and it is connected up to my server using 8Gb/s FC link, with an…
user146882
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Testing faulty fibre network

As contractors linked the main comms with 3 sub-comms location with OM3 fibre I configured main switch Netgear GS728TS using three transceivers Netgear AGM731F, configured switches that will be used on it other end ( GS110TP) and then connected…
Jestem_z_Kozanowa
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High availability using Fibre Channel and iSCSI in vSphere

I'm having a hard time understanding shared storage for high availability in vSphere. I have the following kit: 1 x Mac mini (ESXi 5.5 - part of vSphere) 1 x White box PC (ESXi 5.5 - part of vSphere with Fibre HBA) 1 x HP ProLiant Microserver…
user259430
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How to identify/use existing fiber installation?

When my parents had their house built about 10 years ago, the wiring guy told them that he should install some fiber in the walls, saying that it would be good for future use. So there is some kind of fiber-optic cable connected to several rooms…
johnnyb10
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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 can run any OS but I prefer windows and if I had…
user176122
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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 want a Host with 4 WWPN to have High…
Jim
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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 the details that I am writing here and hopefully…
Thomas
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