Network Service Set Identification - Nortel BayStack 650 User Manual

Network Service Set Identification

On a LAN with multiple BayStack 650 Access Points installed, a mobile user
(a laptop computer with a BayStack 650 PC Card installed) can roam freely
within the Extended service area (ESA) of the access points with the same service
set identifications (SSID) without losing connection to the wired network.
This management is made possible with the assignment of SSIDs and wireless
interaction within both types of networks is managed through the assignment of
SSIDs.
In order for a mobile unit to roam seamlessly from one BayStack 650 Access
Point to another, the SSIDs of all the BayStack 650 Access Points and the
BayStack 650 PC Cards must be the same. Nortel recommends that the access
points be installed on the same logical Ethernet segment (IP subnet).
Figure 1-5
infrastructure networks configured to communicate in the same Ethernet segment
(domain). In this example, assume that Marketing and Engineering physically
moved and coexisted in the same ESA. Assigning SSIDs provides the following
security:
• Prevents members of the Marketing network and the Engineering network
from accessing network resources other than their own.
• Assures that each group has access within its own network.
• Assures that both Marketing and Engineering have access to the same
Ethernet segment or domain.
Figure 1-5
The security provided by SSIDs assures that the four users in Johnny's group
access only each other, the two users in Jerry's pad access only each other, and
neither of those ad hoc groups accesses the other ad hoc network or the
infrastructure network belonging to Marketing and Engineering.
203282-B
illustrates the use of SSIDs in an environment containing multiple
also shows ad hoc networks (Johnny's group and Jerry's pad).
Introduction
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