FortiWLC – Global QoS Settings

Global QoS Settings

Global QoS parameters configure settings that determine call quality on a global level. These settings allow you to fine tune Call Admission Control (CAC), client load balancing, bandwidth scaling, and time-to-live settings.

You can configure the following global quality-of-service parameters:

TABLE 27: Global Quality-of-Service Parameters

Command Purpose
qosvars admission { admitall | pending | reject } Admission control. Valid values are admitall, pending, and reject.
qosvars ttl ttl-value Default time-to-live in seconds for all other protocols besides TCP and UDP.
qosvars tcpttl ttl-value Time-to-live for TCP protocol, in seconds.
qosvars udpttl ttl-value Time-to-live for UDP protocol, in seconds.
qosvars bwscaling value Scale factor for Tspec bandwidth, in percent. May range from 1% to as high as 100% ; 100% is typical
qosvars cac-deauth {on | off} Configures the optional 802.11 de-authentication behavior.
qosvars calls-per-ap max Configures the maximum number of calls per AP.
qosvars calls-per-bssid max Configures the maximum number of calls per BSSID.
qosvars drop-policy {head|tail} Configures the drop policy. Valid values are head or tail respectively.
qosvars load-balance overflow {on | off} Enables and disables load balancing across BSSIDs.
qosvars max-stations-per-radio max Configures the maximum stations (0-128) allowed to associate with a single radio. 128 is the default.

Recommendation:

•  14 voice clients per radio for all AP models

•  40 data clients per radio for all AP models except AP122, and 20 data clients for AP122

qosvars max-stations-per-bssid max Configures the maximum stations (0-1023) allowed to associate with an BSSID.

Global QoS Settings

TABLE 27: Global Quality-of-Service Parameters

Command Purpose
qosvars no enable Turns off QoS.
SIP Idle Timeout Sets the time period after which an idle SIP connection will time out.
Station Assignment Aging Time (s) Sets the time period after which stations will begin aging out.
Maximum Calls Per Interference Region Specifies the number of calls that are permitted in a given interference area.

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