cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements
193
Views
15
Helpful
8
Replies
Beginner

Internet speed limited to 10 Mbps

Hi,

I have a WS-C3850-24P wireless controller that manages three AIR-CAP1602I-T-K9 access points.

The software version of the controller is 03.06.08.E RELEASE SOFTWARE (fc1), IOS cat3k_caa-universalk9.SPA.03.06.08.E.152-2.E8.bin.

The APs are connected directly to the controller (which is also a switch).

We have a 100 Mbps Internet link. However, clients are only achieving 10 Mbps of Internet connection.

If I connect directly to the ISP modem (which is also an AP), I get the 100 Mbps range.

The problem occurs on both 2.4GHz and 5GHz networks.

Does anyone have any idea what might be going on, please?
WLC configuration is attached.

Thanks,

Carlos.

8 REPLIES 8
VIP Advisor

Re: Internet speed limited to 10 Mbps

Hi

 The WLC is able to rate limit traffic. Are you sure you don't have it configured? 

 

 

 

-If I helped you somehow, please, rate it as useful.-

Highlighted
Beginner

Re: Internet speed limited to 10 Mbps

Hi Flavio,

Thanks for your help.

I verified that there is a "port_child_policy" policy map:

Policy Map port_child_policy
 Class non-client-nrt-class
  bandwidth remaining ratio 10

I researched the "bandwidth remaining ratio" command but couldn't understand it very well.

VIP Mentor

Re: Internet speed limited to 10 Mbps

When you say the internet-speed is 10 MBit/s, are you also saying that this problem only occurs when communicating to the internet? Or is it the same when accessing internal resources. If the problem is only with internet, also look at your firewall if there are restrictions. If the problem is also internal, have you checked the ports where the APs are connected?

Beginner

Re: Internet speed limited to 10 Mbps

Hi @Karsten Iwen,

These APs are only used for Internet connections. They are used for guest access only. There is a corporate WLAN configured, but it's not used. I believe I will not be able to test some access to internal resources. However, the configuration of the ports where the APs are connected is as follows:

interface GigabitEthernet1/0/4
 description AP
 switchport access vlan 117
 switchport mode access
!

As for the firewall, it was our first suspicion, but we have already eliminated this possibility.

Thanks,

Carlos.

VIP Mentor

Re: Internet speed limited to 10 Mbps

We have a 100 Mbps Internet link. However, clients are only achieving 10 Mbps of Internet connection.

What type of clients you used for testing ? How many clients in wireless AP when you test it ?

I would do a iperf test with internal server first & then do it with outside that use your internet link

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

 

HTH

Rasika

*** Pls rate all useful responses ***

Beginner

Re: Internet speed limited to 10 Mbps

Hi @Rasika Nayanajith,

We perform tests using notebooks and smartphones.

In some tests, we came to 20 connected users; in others less than 5. And in other tests, there was only the test device connected. In all cases, the problem was the same.

I will perform the iperf test that you recommend and publish the result here.

Thanks,

Carlos.

Beginner

Re: Internet speed limited to 10 Mbps

Hi @Rasika Nayanajith,

We performed the tests you recommended and the result was as follows:

  • In the wireless network, from an internal client to an internal server: peak around 10 Mbps.
  • In the wireless network, from an internal client to an external server (Internet): peak around 10 Mbps (100 Mbps Internet link).
  • In the wired network, from an internal client to an internal server: reaching the expected interface speed, around 700-800 Mbps (GigabitEthernet interface).

The result of the tests is attached.

Thanks,

Carlos.

VIP Mentor

Re: Internet speed limited to 10 Mbps

Hi Carlos,

Thanks for doing iperf & share your results. 

I would like to check your client is connecting WPA2/AES. First check output of below command to see how client is connected on what data rates

show wireless client mac-address <mac_addr> detail

 

Then, I would configure WPA2/AES on your SSID 

https://mrncciew.com/2013/12/04/wlan-config-in-3850-part-1/

3850-1(config-wlan)#security wpa
3850-1(config-wlan)#security wpa wpa2 ciphers aes
3850-1(config-wlan)#no security wpa akm dot1x
3850-1(config-wlan)#security wpa akm psk set-key ascii 0 <SSID_Password>

 

Once do that I would check it again "show wireless client" command

HTH

Rasika

*** Pls rate all useful responses ***

 

CreatePlease to create content
Content for Community-Ad
August's Community Spotlight Awards