User's Guide

Table Of Contents
Threshold Description
Layer 3 Multicast Frames % An alarm that is generated when the system has detected a high
percentage of multicast trac violating the policy thresholds. This
may be a result of potential Layer 3 broadcast storm attacks on the
network.
Enter the maximum percentage of data per minute allowed for
multicast frames to be transmitted or received within a BSS from all
stations. If Extreme AirDefense detects a greater number, it
generates an alarm.
Use the Min Frame control set the minimum number of frames for
this threshold.
Default = 0.
Layer 3 Broadcast Frames % An alarm that is generated when the system has detected a high
percentage of broadcast trac violating the policy thresholds. This
may be a result of potential Layer 3 broadcast storm attacks on the
network.
Enter the maximum percentage of data per minute allowed for
broadcast frames to be transmitted or received within a BSS from
all stations. If Extreme AirDefense detects a greater number, it
generates an alarm.
Use the Min Frame control set the minimum number of frames for
this threshold.
Default = 0.
Retransmission Frames % Enter the maximum percentage of retransmitted data frames
allowed during a transmission of data within a BSS from all stations.
If Extreme AirDefense detects a greater number, it generates an
alarm.
Use the Min Frame control set the minimum number of frames for
this threshold.
Default = 0.
PS Poll Frames Seen An alarm is generated by a DOS attack using an excessive number
of PS-POLL frames have been detected.
Enter the maximum number of PS Poll frames to be seen within a
BSS. If Extreme AirDefense detects a greater number, it generates
an alarm.Default = 0.
Wireless Clients
Use the Wireless Clients tab to configure thresholds for any wireless client. These thresholds will
typically be lower than the aggregate Wireless Client thresholds. Extreme AirDefense generates an
alarm if any single Wireless Client reaches one of these thresholds. From these alarms, you can identify
the high bandwidth users, and the times they are using the network. You should base Wireless Client
thresholds on either the normal transmission rate for your wireless LAN, or on arbitrary numbers
designed to detect your high-bandwidth users.
Note
Entering 0 (zero) as a threshold value disables alarm generation for that particular threshold.
Add Performance Profile Configuration
266 Extreme AirDefense User Guide for version 10.5.