topic How do you enable MIMO? in Wireless

How do you enable MIMO?

Human374 — Mon, 05 Jul 2021 17:40:44 GMT

Hi All,

I do not have experience to Cisco Aironet devices or Wireless networks in general, but I have a AIR-SAP1602E-E-K9 access point and I would like to enable MIMO functionality to increase performance.

At the moment I have the following configuration under the Do0 interface:

interface Dot11Radio0
 no ip address
 no ip route-cache
 !
 encryption mode ciphers aes-ccm 
 !
 ssid MyWiFi
 !
 antenna gain 2
 stbc
 beamform ofdm
 speed  basic-1.0 basic-2.0 basic-11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
 channel least-congested 2412 2437 2462
 station-role root
 bridge-group 1
 bridge-group 1 subscriber-loop-control
 bridge-group 1 spanning-disabled
 bridge-group 1 block-unknown-source
 no bridge-group 1 source-learning
 no bridge-group 1 unicast-flooding
end

The Do1 interface is in admin down state.

Some extra info: the client devices are not 5GHz capable but support 802.11n.

What configuration do I need to implement to enable MIMO? I guess the second interface need to be activated also, right?

Thanks for the help!

Re: How do you enable MIMO?

Sandeep Choudhary — Tue, 09 Jul 2019 12:03:02 GMT

1602 support 3 x 3 multiple-input multiple-output (MIMO) with two spatial streams. Means max you can 300Mbps.

make sure to get 802.11n rates:

1. Open Auth or WPA2/AES on SSID

2. WMM to be enable on SSID

Use the dot11 qos mode wmm configuration interface command to enable WMM using the CLI

Regards

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Re: How do you enable MIMO?

Human374 — Tue, 09 Jul 2019 12:09:34 GMT

Hey,

WPA2/AES is used for security and WMM is enabled.

Do I need to do anything to enable MIMO? Or is it on by default? Can I verify it somehow?

On the other hand, based on the Modulation and coding schemes table, I can reach max 144Mbps to a client, am I not right?

- MCS 15 (this is the highest available MCS in CLI at least in my IOS version)

- Spatial streams 2

- 20 MHz channel (I cannot use 5GHz for 40MHz channel, as the clients can use only 2.4GHz)

Re: How do you enable MIMO?

Sandeep Choudhary — Tue, 09 Jul 2019 12:32:27 GMT

yes if you enable WMM and WPA2-AES then you should able to get 144Mbps speed on clients.

https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1600-series/data_sheet_c78-715702.html

1. also make sure that you rauuning the new SW version on AP.

2. Try with open auth on SSID and test again.

Regards

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