Dell PowerConnect W-Airwave 8.0 Uživatelský manuál stáhnout pdf (Strana 148)

Figure 86:802.11 Radio Counters Summary table

The frame- per-second rate of these and other 802.11 errors over time are tracked and compared in the 802.11 Counters

graph on the same page.

Radio Statistics Interactive Graphs

Time-series graphs for the radio show changes recorded at every polling interval over time when polling with either

SNMP or AMON. Clients and Usage data are polled based on the AP's group's User Data Polling Period. Channel,

Noise, and Power are based on AP Interface Polling Period. 802.11 Counters data are based on the APs group’s 802.11

Counters Polling Period.

The two graph panes enable simultaneous display of two different information sets, as detailed in the following table:

Graph Title Description

Clients

A line graph that displays the maximum users associated to the corresponding radio at

polling intervals over the time range set in the slider. Select Show All for other metrics such

as average users and max users for various individual devices.

Usage

An area graph displaying the average bandwidth in each direction for the radio. Select Show

All for other metrics such as max bandwidth in and out, average and max mesh/overhead or

overhead bandwidth, and average/max Enet0.

Radio Channel

An area graph that displays the channel changes (if any) of the radio over time. Frequent,

regular channel changes on an Dell or Cisco WLC AP radio usually indicate that the

Adaptive Radio Management feature (ARM) in ArubaOS is compensating for high noise

levels from interfering devices.

Radio Noise

An area graph that displays signal interference (noise floor) levels in units of dBm. Noise

from interfering devices above your AP’s noise threshold can result in dropped packets. For

ARM-enabled Dell APs, crossing the noise threshold triggers an automatic channel change.

Radio Power

A line graph that displays the average and maximum radio transmit power, between 0 and

30 dBm, over the time range set in the slider. You can adjust the transmit power manually in

the APs/Devices > Manage page for this radio’s AP, or enable ARM on Dell APs to

dynamically adjust the power toward your acceptable Coverage Index as needed. For more

information, see the Adaptive Radio Management chapter of the

Dell Networking W-Series

ArubaOS User Guide

Radio Errors

A line graph displaying the frame reception rate, physical layer error rate (resulting from poor

signal reception or broken antennas), and the data link (MAC) layer (corrupt frames, driver

decoding issues) for the radio.

802.11 Counters

A line graph that displays statistics such as frame rate, fragment rate, retry rate, duplicate

frame rate, and other metrics tracked by 802.11 counters.

Table 81:

Radio Statistics Interactive Graphs Descriptions

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