H3C Technologies H3C MSR 50 - Manual (Page 80)

71
If a non-WMM client goes online and sends SVP packets to the AP, the SVP packets are assigned
to the AC-VO queue.
Troubleshooting
EDCA parameter configuration failure
Symptom
Configuring EDCA parameters for an AP failed.
Analysis
The EDCA parameter configuration of an AP is restricted by the radio chip of the AP.
Solution
1. Use the display wlan wmm radio ap command to view the support of the radio chip for the EDCA
parameters. Make sure the configured EDCA parameters are supported by the radio chip.
2. Check that the values configured for the EDCA parameters are valid.
3. Make sure the client is a non-WMM client, because SVP takes effect on only non-WMM clients.
SVP or CAC configuration failure
Symptom
The SVP packet priority mapping function configured with the wmm svp map-ac command does not take
effect.
CAC configured with the wmm edca client command does not take effect.
Analysis
The SVP packet priority mapping function or CAC takes effect only after WMM is enabled.
Solution
1. Use the wmm enable command to enable the WMM function.
2. Check the state of the SVP priority mapping function or CAC again.
3. The SVP packet priority mapping function takes effect on only non-WMM clients. Check whether
the client is a non-WMM client.
Configuring client rate limiting
The WLAN provides limited bandwidth for each AP. Because the bandwidth is shared by wireless clients
attached to the AP, aggressive use of bandwidth by a client will affect other clients. To ensure fair use of
bandwidth, rate limit traffic of clients in either of the following methods:
• Configure the total bandwidth shared by all clients. This is called "dynamic mode." The rate limit of
a client is the configured total rate/the number of online clients. For example, if the configure total
rate is 10 Mbps and five clients are online, the rate limit of each client is 2 Mbps.
• Configure the maximum bandwidth that can be used by each client. This is called "static mode." For
example, if the configured rate is 1 Mbps, the rate limit of each client online is 1 Mbps. When the
set rate limit multiplied by the number of access clients exceeds the available bandwidth provided
by the AP, no clients can get the guaranteed bandwidth.