Category: SAN fundamentals

Fibre Channel Frame

Fibre Channel Frame

Fibre Channel Frame   S O F HEADER PAYLOAD C R C E O F ¬† 4 24 2112 4 4   Fibre Channel places a restriction on the length of the data field...

Fibre Channel Networking Model

Fibre Channel Networking Model

Fibre Channel Networking Model It is easier to understand a communications protocol if it is first broken down into parts or layers. For better understanding, Fibre channel protocol has been broken into five layers....

SFP Types

SFP Types

Short Wavelength (SWL) Long Wavelength (LWL) Extended Long Wavelength (ELWL) Wave Division Multiplexing (WDM)   SWL Fiber Optic SFP Module РBased on short-wavelength 850 nm lasers supporting 2 and 4 Gbit/sec link speeds....

Fiber Optic Cables

Fiber Optic Cables

Fiber Optic Cables In FC SAN, optical fibre cables are used as data transmitters. In FC SAN data transmits in the form of light. Fiber types are available in two types: single mode fiber...

What is Zoning?

What is Zoning?

Zoning Zoning means restricting to the scope of an initiator (host) to a particular target (storage array) in fabric. An initiator can see only the devices from a particular storage array that is zoned...

Fibre Channel Classes of service

Fibre Channel Classes of service

Classes of service Applications might require different levels of service and guarantees regarding delivery, connectivity and bandwidth. Some applications need to have bandwidth that is dedicated to them during the data exchange like Tape...

Fibre Channel Topologies

Fibre Channel Topologies

Fibre Channel Topologies Topology is the way of approach to connect devices to form a network. Fibre Channel-based networks support three types of base topologies: Point-to-point Arbitrated loop Switched fabric Switched fabric further classified...

What is Congestion in SAN fabric?

What is Congestion in SAN fabric?

Congestion When over-subscription occurs, it leads to a condition called congestion. When a node is unable to use as much bandwidth as it wants, because of contention with another node, then there is congestion. A...

What is Hop in SAN fabric?

What is Hop in SAN fabric?

Hop When Fibre Channel traffic is going from one E_Port over an ISL to another E_Port, is one hop. ISLs are made from connecting an E_Port to an E_Port. There is a hop count...