Radius Security; Port Redundancy; Intermodule Redundancy; Stack Redundancy - Avaya P333T User Manual

Chapter 1 Overview

Radius Security

The Remote Authentication Dial-In User Service (RADIUS) is an IETF standard
(RFC 2138) client/server security protocol. Security and login information is stored
in a central location known as the RADIUS server. RADIUS clients such as the
Avaya P330, communicate with the RADIUS server to authenticate users.
All transactions between the RADIUS client and server are authenticated throught
the use of a "shared secret" which is not sent over the network. The shared secret is
an authentication password configured on both the RADIUS client and its RADIUS
servers. The shared secret is stored as clear text in the client's file on the RADIUS
server, and in the non-volatile memory of the Avaya P330. In addition, user
passwords are sent between the client and server are encrypted for increased
security.

Port Redundancy

Redundancy can be implemented between any two ports in the same stack at the
link level. You can also assign redundancy between any two LAGs in the stack or
between a LAG and a port. One port or LAG is defined as the primary port, and the
other as the secondary port. In case the primary port link fails, the secondary port
takes over.

Intermodule Redundancy

Intermodule redundancy includes all Port Redundancy functionality. Intermodule
redundancy maintains port integrity even when the primary port link fails as the
result of a failure of the module. If the module on which the primary port in an
Intermodule Port Redundancy is powered down or removed from the device, the
secondary port in the Intermodule Port Redundancy takes over. Only one module
per stack must be set for Intermodule Port Redundancy.

Stack Redundancy

In the unlikely event that an Avaya P330 switch or Octaplane link should fail, stack
integrity is maintained. The broken link is bypassed and data transmission
continues uninterrupted. The single management IP address for the stack is also
preserved for uninterrupted management and monitoring.

Hot-Swappable

You can remove or replace any unit within the stack without disrupting operation
or performing stack-level reconfiguration. You can therefore adapt the P330 to your
requirements on the fly and with a down-time which is second to none.
4 Avaya P333T User's Guide