Руководство По Устранению Ошибки для Cisco Cisco Flex 7510 Wireless Controller

Wireless LAN Controller 7.3 Software

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WLCs 5500 Series, 7500/8500 Series, and WiSM−2

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1040, 1140, 1250, 1260, 2600, 3500, 3600 APs

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The information in this document was created from the devices in a specific lab environment. All of the
devices used in this document started with a cleared (default) configuration. If your network is live, make sure
that you understand the potential impact of any command.

Refer to Cisco Technical Tips Conventions for more information on document conventions.

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).

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When the controller is connected and central switching is used the controller will handle the
downstream enforcement of per−client rate limit only.

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The AP will always handle the enforcement of the upstream traffic and per−SSID rate limit for
downstream traffic.

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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.

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In both directions, per−client rate limit is applied/checked first and per−SSID rate limit is
applied/checked second.

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The WLAN rate limiting will always supercede the Global QoS setting for WLAN and user.

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Rate limiting only works for TCP and UDP traffic. Other types of traffic (IPSec, GRE, ICMP,
CAPWAP, etc) cannot be limited.

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Only policing is implemented in the 7.3 releases.

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No coloring or traffic shaping is done in phase 1.

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Per client Downstream WLC WLC AP AP Per SSID Downstream AP AP AP AP Per client Upstream AP

AP AP AP Per SSID Upstream AP AP AP AP

In releases before 7.3, there is an option to select the downstream rate limit thought the QoS profile page. In
the 7.3 release this capability is expanded, which gives users that already make use of QoS profiles
functionality additional granularity and capabilities. The trade off with configuring the rate limits under the
QoS profile is that there are only four QoS profiles available. Thus, there are only four sets of configuration
options to use.