D-Link DWS-4026, Руководство пользователя

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Software User Manual D-Link Unified Access System
12/10/09
Document 34CSFP6XXUWS-SWUM100-D7 Basic Setup Page 421
If you access the Access Point Profile Radio configuration through the Radio tab for a profile from the WLAN >
Administration > Advanced Configuration > AP Profile page, additional fields are available for configuration.
Table 261 describes the configuration fields for the AP radio that are only available from the Advanced Configuration menu.
Auto Eligible Select the Auto Eligible option beneath each channel to include the channel in the automatic
channel assignment process.
Rate Sets Select the transmission rate sets you want the access point to support and the basic rate sets
you want the access point to advertise.
Rates are expressed in megabits per second.
Basic These numbers indicate the data rates that all stations associating with the AP must support.
Supported These numbers indicate rates that the access point supports. You can select multiple rates.
The AP automatically chooses the most efficient rate based on factors like error rates and
distance of client stations from the AP.
Table 261: Advanced Radio Configuration
Field Description
RF Scan Interval This field controls the length of time between channel changes during the RF Scan.
RF Scan Sentry
Channels The radio can scan channels in the radio frequency used by the 802.11b/g band (2.4 GHz),
the 802.11a band (5 GHz), or both bands. Select the channel band for the radio to scan.
Note:
The band selection applies only to radios in sentry mode. Both radios on the DWL-
8600AP can scan both bands.
RF Scan Duration This field controls the amount of time the radio spends scanning the other channel (in
milliseconds) during an RF scan.
Rate Limiting Enabling multicast and broadcast rate limiting can improve overall network performance by
limiting the number of packets transmitted across the network. This feature is disabled by
default.
Note: The available rate limit values are very low for most environments, so enabling this
feature is not recommended.
Rate Limit Enter the rate limit you want to set for multicast and broadcast traffic. The limit should be
greater than 1, but less than 50 packets per second. Any traffic that falls below this rate limit
will always conform to and be transmitted to the appropriate destination.
The default and maximum rate limit setting is 50 packets per second. This field is disabled if
Rate Limiting is disabled.
Rate Limit Burst Setting a rate limit burst determines how much traffic bursts can be before all traffic exceeds
the rate limit. This burst limit allows intermittent bursts of traffic on a network above the set rate
limit.
The default and maximum rate limit burst setting is 75 packets per second. This field is
disabled if Rate Limiting is disabled.
Channel Bandwidth The 802.11n specification allows the use of a 40-MHz-wide channel in addition to the legacy
20-MHz channel available with other modes. The 40-MHz channel enables higher data rates
but leaves fewer channels available for use by other 2.4 GHz and 5 GHz devices. The 40-MHz
option is enabled by default for 802.11a/n modes and 20 MHz for 802.11b/g/n modes. You
can use this setting to restrict the use of the channel bandwidth to a 20-MHz channel.
Table 260: Radio Settings (Cont.)
Field Description