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Slow speeds with AIR-SAP2602E-A-K9

Electric261
Beginner
Beginner

We recently added a Cisco AIR-SAP2602E-A-K9 to our office network and we are only seeing up to 26Mbps using the WiFi.  Is this normal?  Also, we have looked into purchasing some external antenna for it and I don't know how much it will help.  Does anyone have advice on how to improve the usability and speed?

Thanks

1 Accepted Solution

Accepted Solutions

Rasika Nayanajith
VIP Mentor VIP Mentor
VIP Mentor

How you measure your WiFi speed? speedtest application ?

What is your internet bandwidth and what do you see when you do a similar test on wired PC ? Pls see below post and try to do a performance test with internal iPerf server rather with internet.

https://mrncciew.com/2014/08/08/how-fast-is-your-network-iperf/ 

 

There is a difference between data rates vs throughput, so when you compare different devices performance it could be mostly due to end point capability. Wireless data rates depend on 3 things

1. Channel Bandwidth configured (20,40 if your devices connect to 5GHz)

2. Spatial stream support of client device

3. Long Guard Interval(0.8us) or Short Guard Interval (0.4us)

You can refer to below link to see what data rates you can expect

http://mcsindex.com/ 

 

For client capabilities, go for the following link

https://clients.mikealbano.com/ 

 

HTH

Rasika

*** Pls rate all useful responses ***

View solution in original post

3 Replies 3

balaji.bandi
VIP Community Legend VIP Community Legend
VIP Community Legend

where the AP connected port- connect PC and test you getting the speed expected? any way max you get on this AP is 50MBps only depends how it configured.

 

BB

***** Rate All Helpful Responses *****

How to Ask The Cisco Community for Help

Rasika Nayanajith
VIP Mentor VIP Mentor
VIP Mentor

How you measure your WiFi speed? speedtest application ?

What is your internet bandwidth and what do you see when you do a similar test on wired PC ? Pls see below post and try to do a performance test with internal iPerf server rather with internet.

https://mrncciew.com/2014/08/08/how-fast-is-your-network-iperf/ 

 

There is a difference between data rates vs throughput, so when you compare different devices performance it could be mostly due to end point capability. Wireless data rates depend on 3 things

1. Channel Bandwidth configured (20,40 if your devices connect to 5GHz)

2. Spatial stream support of client device

3. Long Guard Interval(0.8us) or Short Guard Interval (0.4us)

You can refer to below link to see what data rates you can expect

http://mcsindex.com/ 

 

For client capabilities, go for the following link

https://clients.mikealbano.com/ 

 

HTH

Rasika

*** Pls rate all useful responses ***

Rich R
VIP Advisor VIP Advisor
VIP Advisor

> "Also, we have looked into purchasing some external antenna for it and I don't know how much it will help."

Are you trying to run an E model AP (= external antenna) without any antennas?

If so then you're lucky to get that much out of it and you definitely need to install the external antennas - they'll help a lot.

___________________________________________
TAC recommended codes for AireOS WLC's
Best Practices for AireOS WLC's
TAC recommended codes for 9800 WLC's
Best Practices for 9800 WLC's
Cisco Wireless compatibility matrix
Field Notice: FN-72424 Later Versions of WiFi 6 APs Fail to Join WLC - Software Upgrade Recommended
WARNING - see CSCwd37092 Throughput degraded after upgrading to code 8.10.181.0/17.3.6 - 2800/3800/4800 series
- The fix for CSCwd37092 is now released in 8.10.183.0 and
- For IOS-XE 17.3.6 select controller model, go to IOS XE Software AP Service Pack, select CSCwd40096 17.3.6 APSP2
Field Notice: FN-63942 Lightweight APs and WLCs Fail to Create CAPWAP Connections Due to Certificate
                      Expiration - Software Upgrade Recommended
Field Notice: FN-72524 - During Software Upgrade/Downgrade IOS APs Might Remain in Downloading State
                     After 4 Dec 2022 Due to Certificate Expiration - Fixed in 8.10.183.0 and 17.3.6 APSP5 (APSP_CSCwd83653)
                     Also fixed in 8.5.182.7 (8.5 mainline) and 8.5.182.105 (8.5 IRCM) if you can't upgrade to 8.10
                     Note that 8.10.181.0 and 8.10.182.0 have been deferred (withdrawn) and are effectively unsupported by Cisco
___________________________________________
Richard R
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