Motorola RFS Series System Reference Guide

4-58 Motorola RF Switch System Reference Guide
5. Select the Broadcast Key Rotation checkbox to enable periodically changing the broadcast key for this
WLAN.
Only broadcast key changes when required by associated MUs to reduce the transmissions of sensitive
key information. This value is enabled by default.
6. Refer to the Update broadcast keys every field to specify a time period (in seconds) for broadcasting
encryption-key changes to MUs.
Set key broadcasts to a shorter interval (at least 60 seconds) for tighter security on wireless connections.
Set key broadcasts to a longer interval (at most, 86400 seconds) to extend key times for wireless
connections. The default is 7200 seconds.
7. Configure the Key Settings field as needed to set an ASCII Passphrase and key values.
Default (hexadecimal) 256-bit keys for WPA/TKIP include:
• 1011121314151617
• 18191A1B1C1D1E1F
• 2021222324252627
• 28292A2B2C2D2E2F
8. Optionally select one of the following from within the Fast Roaming (8021x only) field.
ASCII Passphrase To use an ASCII passphrase (and not a hexadecimal value), select the checkbox
and enter an alphanumeric string of 8 to 63 characters. The alphanumeric string
allows character spaces. The
switch converts the string to a numeric value. This
passphrase saves the administrator from entering the 256-bit key each time keys
are generated.
256-bit Key To use a hexadecimal value (and not an ASCII passphrase), select the checkbox
and enter 16 hexadecimal characters into each of the four fields displayed.
NOTE: The Web UI does not support saving passphrases in encrypted format. To save
passphrases in an encrypted format, configure the passphrases using the Command Line
Interface. Refer to the CLI Reference Guide for details on configuring passphrases using
the CLI.
PMK Caching Select Pairwise Master Key (PMK) caching to store Pairwise Master Key derived
from 802.1x authentication between a client device and its authenticator. When a
client roams between devices, the client’s credentials no longer need to be
completely reauthenticated (a process that can take up to 100 milliseconds). In the
instance of a voice session, the connection would likely be terminated if not using
a PMK. PMK cache entries are stored for a finite amount of time, as configured on
the wireless client.

Motorola RFS Series Specifications

General

Brand	Motorola
Model	RFS Series
Category	Switch
Language	English