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Chapter 1 Overview
4 P332G-ML User’s Guide
Stack Redundancy
In the unlikely event that a P330 switch or Octaplane link should fail, stack integrity
is maintained if the redundant cable is connected to the stack. 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.
Spanning Tree
P332G-ML supports the IEEE 802.1D Standard Spanning Tree Protocol. This
protocol detects and eliminates logical loops in the network and automatically
places some ports on standby to form a network with the most efficient pathways.
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.
When you remove an expansion module from the stack, all configuration
definitions on expansion modules are lost.
If you wish to save configuration definitions perform the following procedure:
1 Power down the switch.
2 Remove the expansion module.
3 Insert the new module.
4 Power up the switch.
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
P332G-ML, communicate with the RADIUS server to authenticate users.
All transactions between the RADIUS client and server are authenticated through
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 P332G-ML. In addition, user
passwords are sent between the client and server are encrypted for increased
security.