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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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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 distance requirements.
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Fiber link suddenly degrades, cold weather? (Turns out not.)

I live in a dorm where the network is mostly resident-managed and budget is limited. The network is a basic star topology, with a central switch in the server room branching out to switches that feed two hallways each, with no redundancy. The links…
user31053
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Linux pppoe/pppd won't connect to Centurylink fiber

Equipment: Fedora 27 x86_64 Technicolor C2100T DSL modem/router Unknown Centurylink ONT optical adapter` I recently switched from CL 80mb DSL to CL 1000mb fiber, which still relies on pppoe. I have always used a basic Linux Fedora machine as the…
bfoddy
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dell md series device specific module for multi-path failed to return a path?

We have a Dell PowerVault 3620f (fiber) and I am getting the following errors in the Windows event log. I am no good with fiber zoning so I would need to pull in someone to take a look but figured I would ask here first. We also have a mirrored…
Thorin
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Mount the Vplex Virtual Volume ( LUN ) Xen Server

Hello ServerFault members, Please help me with this issue. I am in very strange situation with my Xenserver environment. I am trying to mount the Dell EmC ( Vplex LUN ) to the Xen server HA and when I use the HBA connection I don't see the Lun. here…
kunal
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What to expect from a 10Gbs fiber optic network of one server connected directly to 4 clients?

I have a fiber optic network of one server connected directly to 4 clients(they are not connected to each other) The network is suppose to support up to 4x10Gbs, so 10Gbs throughput from each client to the server. Given the server connected directly…
user504571
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Options for an ultra-fast small LAN

I need to transfer several terabytes/day between three windows computers. Two computers are employed to acquire medical imaging data (500 Gbytes/sample, ca. 6-7 samples/day), and the third is dedicated to data analysis (browsing through 3D stacks,…
aag
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Optical fiber modem with fiber output

Is there a modem that has a fiber optic output? I have an internet connection, where I receive the signal via fiber optic, I already have a modem, but the output of the modem is RJ45, and on my computer has an input for fiber optics, So I would like…
John Soranw
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Fibre Optic port moving to 1000Mb/s eventhough it is not in the supported link mode

In my Fibre Optic device (Linux 2.6.27, LXT971A PHY Transceiver), connection to the port is lost intermittently. While debugging with ETHtool, the following observation was observed: Settings for eth0: Supported ports: [ TP MII ] Supported link…
karthikkumar
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Can I Add HBA Card to A Workstation Or It Need to be Server?

I have "HP Z440 Workstation" and I want to connect SAN Storage to it. My Search Lead me To HBA cards as the answer, But I cant Confirm if its going to work or not. and what is the OS requirements, Would W7 or w10 Work or do I need Server OS. Note…
Saleh Alshaikh-navigator
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Stacking two production and configured Qlogic SanBox 5800V switches

Some time ago, our consultants installed two SanBox 5800V fiber switches as part of an infrastructure refresh, that sit between our HP P2000 SAN and our VMware ESXi hosts. The switches at that time, were not stacked, and as such are not considered…
James Edmonds
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Sizing Firewall for Micro-Datacenter

We have a small data center we're finishing. We have a core+spline and then redundant TOR switches. Everything is basically whitebox 10gb switches running Cumulus; although, we will upgrade the core within the next 12 months to be 40gb, but this…
Ethode
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Encryption on Gigabit Ethernet

We have 2 offices connected with a fiber optics cables. On both sides FO is inserted into the fiber ports in the switches but we can install fiber pci-e cards in some servers if required. The offices are small, all people generally trust each other,…
disserman
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SCSI queue depth / command queue settings

I two servers with about 100 LUNs presented to each from an IBM V7000 (Storwize). Each LUN has 8 paths - 2 FC ports x 2 FC switches x 2 V7000 heads - so about 800 devices. Devices/paths are managed by multipathd. Whenever one of the FC switches or…
mapa3m
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Fiber optic cable connection to switch not working

I am currently working in a project which uses a 12 core SM fiber optic cable running 40 km. Switched are connected in ring topology. Distance between two switches will be max 8 km and i am having 11 switches placed in 40 km. Now between two…
Vinay Singh
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