World Library  
Flag as Inappropriate
Email this Article

Npiv

Article Id: WHEBN0007274246
Reproduction Date:

Title: Npiv  
Author: World Heritage Encyclopedia
Language: English
Subject: Fibre Channel, NX-OS
Collection: Fibre Channel
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Npiv

NPIV or N_Port ID Virtualization is a Fibre Channel feature whereby multiple Fibre Channel node port (N_Port) IDs can share a single physical N_Port. This allows multiple Fibre Channel initiators to occupy a single physical port, easing hardware requirements in Storage Area Network (SAN) design, especially where virtual SANs are called for. This allows each virtual server to see its own storage and no other virtual server's storage.[1] NPIV is defined by the Technical Committee T11 in the Fibre Channel - Link Services (FC-LS) specification.

N_Port initialization with and without NPIV

Normally N_Port initialization proceeds like this:

  • N_Port sends FLOGI to address 0xFFFFFE to obtain a valid address
  • N_Port sends PLOGI to address 0xFFFFFC to register this address with the name server
  • N_Port sends SCR to address 0xFFFFFD to register for state change notifications

However with NPIV it may continue like this:

  • N_Port sends FDISC to address 0xFFFFFE to obtain an additional address
  • N_Port sends PLOGI to address 0xFFFFFC to register this additional address with the name server
  • N_Port sends SCR to address 0xFFFFFD to register for state change notifications.
  • ... (repeat FDISC/PLOGI/SCR for next address)

FDISC is an abbreviation for Fabric Discovery, or "Discover Fabric Service Parameters", which is a misleading name in this context. It works just like FLOGI.

Notes

  1. ^ http://searchvirtualstorage.techtarget.com/definition/N_Port-ID-virtualization-NPIV

Sources

  • Fibre Channel - Link Services
  • NPIV Functionality Protocol
  • T11 latest draft standards page
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.