Enterasys brim-f6 Benutzerhandbuch

Seite von 132
Network Design
5-2
The Role of the Workgroup
As this Networking Guide is concerned with the decisions made regarding 
networking hardware and not with the administration of networks or the specific 
uses to which they are put, several aspects of the overall process of network 
design are not treated in this document, such as the selection of a Network 
Operating System (NOS), the choice of applications or of workstation types, or 
other specific decisions generally out of the purview of Cabletron Systems as a 
provider of networking hardware. These aspects of network design will, however 
have an impact on the performance of networks, and should be fully investigated 
before designs are attempted.
The Role of the Workgroup
A workgroup is a group of network end stations that are related in some way. The 
conditions of this relationship are determined by the Network Manager, and can 
be based on anything from device type to user occupation or even device color. As 
the workgroup is the operating portion of the network, where information is 
created and given direction, the workgroup is the portion of the network that 
creates traffic and network congestion. As such, it is the most complicated portion 
of the network to design.
Very few networks are made up of one workgroup. It is a mistake, however, to 
underestimate the importance of a properly designed and well-planned 
workgroup, as the vast majority of enterprise networks are collections of 
workgroups that are connected to one another. The various workgroups all have 
different needs and implementations, and are tied together to form a cohesive and 
capable enterprise network. A logical, well-thought-out workgroup plan and a 
skillful execution of the creation of workgroups according to a firm set of criteria 
goes a long way toward ensuring that the network which results will be 
functional, flexible, reliable, and sufficiently robust to handle the demands placed 
on it by users. 
The idea of the workgroup in the network roughly translates to the use of 
segmentation. Ideally, segmentation should be planned between separate 
workgroups or between collections of related workgroups, not within 
workgroups. The workgroup concept divides the network according to a cohesive 
plan in the interests of reliability, efficiency, or ease of recovery. While all of these 
are important factors in the operation of the network, certain choices made in the 
design of networks, from technology and topology to the organization of stations 
and the segmentations method used if any, will improve some aspects of the 
network at a cost to others. Striking the proper balance of these factors is the 
responsibility of Network Managers, who must investigate and determine the 
needs and preferences of the proposed network’s users.
NOTE
This chapter does not discuss the relative merits of one 
networking technology over another. For information on the 
different strengths of the available technologies, refer to the 
Cabletron Systems Networking Guide - MMAC-FNB Solutions.