Description

This article explains the difference between the virtual chassis and virtual chassis fabric.

Solution

Virtual ChassisVirtual chassis fabric
Virtual Chassis provides a simple way of interconnecting multiple switches into a ring topology and managing those interconnected switches as a single device. You can, for example, connect four switches, each with 48 ports, into one Virtual Chassis with 192 ports. (A Virtual Chassis scales to ten devices.) The devices can be on a single rack or in dierent locations that can be connected with long-distance optical cabling.Virtual Chassis Fabric (VCF) evolves Virtual Chassis by allowing customers to interconnect multiple switches into a spine-and-leaf fabric architecture and manage the interconnected switches as a single device. VCF provides many of the benefits of a Virtual Chassis while supporting up to 20 devices. VCF works well for small data centers in which the Point of Delivery (POD) size could be as large as 16 racks, and can still be managed from a single device for the entire fabric.
Benefits:Benefits:
Virtual Chassis is managed from a single IP address, eliminating the need to have an IP address for each device. Traffic can easily be redirected within a
Virtual Chassis when a member device fails, increasing fault tolerance. And, Virtual Chassis simplifies network topology by minimizing or eliminating
the need for loop prevention protocols like Spanning Tree Protocol (STP). 		Virtual Chassis Fabric uses many of the same principles of Virtual Chassis,
but it is purpose-built for data center traffic that requires predictable and consistent performance for virtualized and non-virtualized workloads. It has deterministic latency and performance between any two end points within the fabric.VCF has a single point of management. It supports data centers that contain a mix of 1-Gbps, 10-Gbps, and 40-Gbps Ethernet interfaces
Virtual Chassis solves a problem of complex management. It is optimized for traffic that is directionally North-South traffic, for example, between a user and an application. It is optimized for deployment in campus or enterprise networks.Virtual Chassis Fabric also tackles complex management by providing
connectivity for applications within data centers. This machine-to-machine,
or application-to-application traffic, also referred to as East-West traffic, is in
addition to the North-South traffic between data center and user. East-West
traffic often lives on virtual machines (VMs) and as these VMs move, overall
performance still needs to be predictable and deterministic
Types of switches considered for VC:Types of switches considered for VCF:
Most EX Series Ethernet switches, as well as QFX Series switches, support Virtual Chassis.QFX5100 switches are used as spine devices. QFX5100 and EX4300 switches can be used as leaf devices.
  

Modification History

2024-05-07 : Article Created