Friday, December 5, 2014

Netiquette IQ Technical Term of The Day - Leaf-spine Architecture

===================================

 ===================================
Leaf-spine (leaf-spine architecture)
http://cdn.ttgtmedia.com/rms/onlineImages/rouse_margaret.jpg
Margaret Rouse WhatIs.com
Leaf-spine is a network topology in which a series of switches form the access layer
Leaf-spine is an alternate to the three-layer core/aggregation/access network architecture.The leaf switches mesh into the spine, which is a series of several high-throughput layer 3 switches with high port density. Spine switches are essentially the core of the architecture, whereas leaf switches are the access layer that delivers network connection points for servers. Leaf switches also provide uplinks to spine switches.
Every leaf switch connects to every switch in the network fabric; no matter which leaf switch a server is connected to, it has to cross the same number of devices every time it connects to another server. The only exception is when the other server is on the same leaf. Latency is therefore minimized to an acceptable level because each payload only has to travel to a spine switch and another leaf switch to reach its endpoint.
A leaf-spine topology can be layer 2 or layer 3 -- the links between the leaf and spine layer can be switched or routed. In a layer 2 leaf-spine design, Transparent Interconnection of Lots of Links or shortest path bridging takes the place of spanning-tree. All hosts are linked to the fabric and offer a loop-free route to their Ethernet MAC address through a shortest-path-first computation. In a layer 3 design, each link is routed, and it is most efficient when virtual local area networks are sequestered to individual leaf switches or when a network overlay, like VXLAN, is working.
============================================
In addition to this blog, I have authored the premiere book on Netiquette, "Netiquette IQ - A Comprehensive Guide to Improve, Enhance and Add Power to Your Email". You can view my profile, reviews of the book and content excerpts at:
 www.amazon.com/author/paulbabicki
 If you would like to listen to experts in all aspects of Netiquette and communication, try my radio show on BlogtalkRadio  and an online newsletter via paper.li.I have established Netiquette discussion groups with Linkedin and  Yahoo I am also a member of the International Business Etiquette and Protocol Group and Minding Manners among others. I regularly consult for the Gerson Lehrman Group, a worldwide network of subject matter experts and I have been contributing to the blogs Everything Email and emailmonday . My work has appeared in numerous publications and I have presented to groups such as The Breakfast Club of NJ Rider University and  PSG of Mercer County New Jersey.

==========================================



No comments:

Post a Comment