QoS Override Per-SSID Bandwith question

Question

Hi all,
on a WLAN there is the possibility to override the QoS Bandwidth settings.
I try to get some more information about these settings, I want to understand this. As well a customer wants to limit user data.
My question is: This override Per-SSID, are these settings on a AP basis or on the global controller basis?
The next question resulting out this will then be what if the AP is set to flex-connect with local VLAN traffic, what then?
Is there a good documentation on this?
Thanks.

Answer 1

This section describes BDRL of the 7.3 release. In releases 7.2 and earlier, there is only the ability to limit the downstream throughput across an SSID and per user on the Global interface. With this new feature in the 7.3 release, rate limits can be defined on both upstream and downstream traffic, as well as on a per WLAN basis. These rate limits are individually configured. The rate limits can be configured on WLAN directly instead of QoS profiles, which will override profile values.
This new feature adds the ability to define throughput limits for users on their wireless networks with a higher granularity. This ability allows setting a priority service to a particular set of clients. A potential use case for this is in hotspot situations (coffee shops, airports, etc) where a company can offer a free low-throughput service to everyone, and charge users for a high-throughput service.
Note: The enforcement of the rate limits are done on both the controller and AP.
Rate limiting is supported for APs in Local and FlexConnect mode (both Central and Local switching).
When the controller is connected and central switching is used the controller will handle the downstream enforcement of per-client rate limit only.
The AP will always handle the enforcement of the upstream traffic and per-SSID rate limit for downstream traffic.
For the locally switched environment, both upstream and downstream rate limits will be enforced on the AP. The enforcement on the AP will take place in the dot11 driver. This is where the current classification exists.
In both directions, per-client rate limit is applied/checked first and per-SSID rate limit is applied/checked second.
The WLAN rate limiting will always supercede the Global QoS setting for WLAN and user.
Rate limiting only works for TCP and UDP traffic. Other types of traffic (IPSec, GRE, ICMP, CAPWAP, etc) cannot be limited.
Only policing is implemented in the 7.3 releases.
http://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/113682-bdr-limit-guide-00.html