topic 802.11n 5@40 in Wireless

802.11n 5@40

Yevhenii Petrov — Sun, 04 Jul 2021 05:19:34 GMT

I try get all benefits of 802.11n with 1262N in standalone mode (12.4(25d)JA)

But I see the next

Settings for int dot11radio1 is the next

speed basic-54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.

channel width 40-above

channel 5300

station-role root

All antennas are active, wmm is active

But I get only about 2MB/s by ftp

For test I use the next scheme

Client-Win7(Linksys ae2500)(vlanA) == R1:1262N:Gi0 == Gi:SW:Gi == Gi:(vlanA):FtpServer

On the same stand I get about 6MB/s with 5Ghz and channel width 20MHz

In all attempts was only one client and the clean environment, i proved it with a spectrum-analyzer

Tell me what I'm doing wrong? Thank you.

Client associated with next parameters:

5@40:

----

Key Mgmt type : WPAv2 PSK

Encryption : AES-CCMP

Current Rate : m15.

Capability : WMM 11h

Supported Rates : 54.0 m0. m1. m2. m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15

Bandwidth : 40 MHz

5@20

---

And the same, but bandwidth is 20 MHz

Re: 802.11n 5@40

Scott Fella — Wed, 20 Jun 2012 15:20:15 GMT

Eugene,

What is your baseline with a wired pc doing the same test on vlan A?

Sent from Cisco Technical Support iPhone App

802.11n 5@40

grabonlee — Wed, 20 Jun 2012 17:23:19 GMT

The supported rates is not important. Those are for a/b/g. What you have to verify is if High Throughput(HT) is enabled with the MCS rates 0-7 for clients and 8-15 for AP.

802.11n 5@40

Amjad Abdullah — Wed, 20 Jun 2012 19:34:12 GMT

Have you tried different client for testing?

This link could be helpful: http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a0080a3443f.shtml#topic8

HTH

Amjad

802.11n 5@40

grabonlee — Wed, 20 Jun 2012 21:10:31 GMT

Eugene,

What guard interval is set, 400ns or 800ns or only 800ns? 400ns ensures higher throughput than 800ns.

To be sure, enter the command

interface dot11radio 1 --------- 5GHz n radio

guard interval any

Re: 802.11n 5@40

Yevhenii Petrov — Thu, 21 Jun 2012 06:39:31 GMT

Scott,

with a wired pc I get 20-25MB/s

ftp:gi - sw - gi:notebook and ftp:gi - gi:notebook

Re: 802.11n 5@40

Yevhenii Petrov — Thu, 21 Jun 2012 06:51:39 GMT

"guard interval any" is default setting

sh controllers dot11Radio 1 | i Guard

Guard-Interval: Any

In any case, I attach the full version of sh controll dot11radio1

Maybe this is will help to understand what I am missing

Re: 802.11n 5@40

Yevhenii Petrov — Thu, 21 Jun 2012 10:30:02 GMT

Сolleagues, the problem with the adapter.

Dlink dwa-160 rev A2 managed to get about 11MB/s

AE2500 is still not working as it should be.

Surprised that Linksys is such a bad product.

May be possible to configure the adapter,

but after all that time that I spent I very doubt.

Thanks all for replies

802.11n 5@40

Scott Fella — Thu, 21 Jun 2012 10:53:46 GMT

Eugene,

It is always a good idea to baseline from the wired side, so you can get an idea of the actual throughput from the devices you are using, and you can figure out the percentage of actual throughput if the ftp was connected to a 100mbps or 1000mbps connection. Using multiple adapter as a test is also good, because each one has it good and bad. At least you were able to see that in your testing.