101
Syntax
edca radio { ac-be | ac-bk | ac-vi | ac-vo } { ack-policy { noack | normalack } | aifsn aifsn-value |
ecw ecwmin ecwmin-value ecwmax ecwmax-value | noack | txoplimit txoplimit-value } *
undo edca radio { ac-be | ac-bk | ac-vi | ac-vo }
Default
The default EDCA parameter values are shown in Table 13.
Table 13 Default EDCA parameter values
AC AIFSN ECWmin ECWmax TXOP Limit
AC-BK 7 4 10 0
AC-BE 3 4 6 0
AC-VI 1 3 4 94
AC-VO 1 2 3 47
Views
Radio interface view
Predefined user roles
network-admin
Parameters
ac-be: Specifies the AC-BE (best-effort traffic) queue.
ac-bk: Specifies the AC-BK (background traffic) queue.
ac-vi: Specifies the AC-VI (video traffic) queue.
ac-vo: Specifies the AC-VO (voice traffic) queue.
ack-policy: Specifies the ACK policy for the AC queue.
noack: Specifies the No ACK policy.
normalack: Specifies the Normal ACK policy (the default).
aifsn aifsn-value: Specifies the arbitration inter-frame spacing number (AIFSN), in the range of 1 to
15.
ecwmin ecwmin-value: Specifies the exponent form of CWmin (ECWmin). The value range for the
ecwmin-value argument is 0 to 10.
ecwmax ecwmax-value: Specifies the exponent form of CWmax (ECWmax). The value range for the
ecwmax-value argument is 0 to 10. The value of ECWmax cannot be smaller than the value of
ECWmin.
txoplimit txoplimit-value: Specifies the transmission opportunity limit (TXOP Limit) value in units of
32 microseconds. The value range for the txoplimit-value argument is 0 to 32767. If the value is 0, a
client can send only one packet each time it holds the channel.
Usage guidelines
As a best practice, set TXOP Limit values for AC-BK, AC-BE, AC-VI, and AC-VO queues to 0, 0, 188,
and 102, respectively for 802.11b radios.
Examples
# Set the AIFSN of the AC-VO queue to 2 in radio view of radio 2.
<Sysname> system-view
[Sysname] interface wlan-radio 0/1
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