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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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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 small air conditioned server room. About 200m away,…
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How to plan SAN Storage?

I'm pretty new to the whole SAN thing and am trying to wrap my head around some fundamentals. We are trying to build up a Hyper-V Cluster with two Servers and some external storage media like an HPE MSA 2050 (not set in stone), but I have some very…
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100BASE-FX WDM vs 100BASE-BX vs 100BASE-BX10 - Are they all the same?

Are these three all the same thing being inconsistently named by different manufacturers? 100BASE-FX WDM uses separate wavelengths (1310 nm & 1550 nm) for Tx & Rx over a single strand of fiber. I cannot find any documentation for 100BASE-FX that…
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Should Server Internet Connection be based solely on Internet Speed?

We are running our own server and our country's ISP is telling us that we should run it with their T1 Copper Line with 2mb DL & UL. Right now it is running on a Fiber Line with 8mb DL & UL. They say that the T1 would be better since it is connected…
Jo E.
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What type of Fiber-Connector is this?

I have four of the below connections on site and need to bring them alive, yet my googling and wikipedia does not clearly show my which type of connector I have. I assume this to be a duplex LC connector, yet the picture seems to show a different…
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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 thought Network, but perhaps I'd have to do something…
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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 such modules? Is it determined dynamically, or…
John Zwinck
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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 be, that doesn't make any sense. My thinking was…
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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 ZFS array attached to one that I'd like to share to…
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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 connections I have. The core switch is SX, as is the…
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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 my OTDR) after installation. My customer was…
renosis
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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 movistar supplies you with is a Irouter 1104w We DO…
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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 possibility of gradually upgrading to 10…
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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 only way I can tell if that network is up is by…
Porch
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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 polishing the ends and using epoxy while the other…
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