• • • • • • Introduction This document describes the steps to correctly perform throughput Wireless speed testing. Testing the maximum speed that can be achieved over Wireless networks will be depending on a variety of factors that will be discussed in this article.

Prerequisites Requirements There are no specific requirements for this document. Components Used The information in this document is based on these software and hardware versions: • Cisco Wireless LAN Controller 2504 - Version 7.6.130.0 • Cisco Wireless Lightweight 3702 Access Point in FlexConnect Local Switching mode.

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• Gigabit Cisco Ethernet Switch - Cisco IOS 12.2.55 • MacBook Pro Retina 2014 with Broadcom BCM43xx Chipset - OS X • Gigabit Ethernet Wired Laptop - Windows XP 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. Configure Network Diagram Preparing the test environment The most crucial and important step to obtain accurate and correct Wireless throughput testing is the setup on which you are going to perform the test. There are a lot of things to take into consideration when performing such a test and the variables can influence the results dramatically Before laying out the setup and how to prepare it, let us have a quick look at the different wireless protocols and announced speeds that they can achieve: • 802.11b: The 802.11b standard has a maximum raw data rate of 11 Mbit/s.

• 802.11g: It operates at a maximum physical layer bit rate of 54 Mbit/s exclusive of forward error correction codes, or about 22 Mbit/s average throughput. • 802.11a: It operates in the 5 GHz band with a maximum net data rate of 54 Mbit/s, plus error correction code, which yields realistic net achievable throughput in the mid-20 Mbit/s. • 802.11n: It operates at a maximum net data rate of 600 Mbit/s. Channel width support of up to 40 Mhz.

• 802.11ac Wave 1: It operated at a maximum net data rate of 1300 Mbit/s. Channel width support of up to 80Mhz. • 802.11ac Wave 2: to be release will be support channel with of up to 160 Mhz. In this document we are going to test 802.11ac Wave1.

Below are the steps to correctly setup a Wireless throught test environment: 1) Prepare the Wireless Client: Whether you are going to test with a Laptop, a PC with Wireless NIC or with a Handheld phone or tablet. The first thing that you need to look at is the Wireless chipset. If you want to test 802.11ac, then you need to make sure that the chipset is 802.11ac capable.

You need to look at the chipset vendor and ensure you are having the latest drivers installed. Having the latest drivers installed does not mean that you are bug-free.

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802.11ac is in Wave 1 and different manufacturers are continuously working towards improving the speeds that their chipsets are able to achieve. In case you are using a USB WIFI 802.11ac NIC card, then you need to make sure that the port on which you have plugged the USB NIC card is USB3. For example: USB 1.0 specified data rates of 1.5 Mbit/s ( Low-Bandwidth) and 12 Mbit/s ( Full-Bandwidth).

USB 2.0 was released in April 2000 (now called 'Hi-Speed'), adding higher maximum signaling rate of 480 Mbit/s (due to bus access constraints the effective throughput is limited to 35 MB/s or 280 Mbit/s). While USB 3.0 was released in November 2008. The standard defines a new SuperSpeed mode with a signaling speed of 5 Gbit/s and, due to encoding overhead, usable data rate of up to 4 Gbit/s. So for example, in case you want to test 802.11ac or 802.11n with a USB NIC Card plugged to a USB1 port then your test is invalid because your throughput is going to drop on the USB port itself. 2) Prepare the Access Point and its mode: In this example we are using the Cisco 3700 802.11ac AP. The AP will be connected to a Gigabit Ethernet 1000Mbit/s switchport. This is eventually very important, because if we plug the AP to a 10/100Mbit/s switchport then our 802.11ac test will be invalid.