Slow Internet speed via wifi network

[Capricorn]

Hi!

We have Cisco 5508 WLC with Cisco Aironet 1140: AIR-AP1142N-E-K9. The browsing speed via WIFI is really slow like 5 Mbps.

I am CCNA and CCNA Security but have basic knowledge about Cisco wifi setup.

I have to troubleshoot the performance issue. So someone can guide me with this.

Thanks

[Leo Laohoo]

So what radio is/are the client(s) connected on?

What data rates are enabled globally or RF Profiles?

Is there any bandwidth contract enabled or AVC enabled on the SSID?

[kholford]

I was just trying to follow along on this thread, if I don't have any RF Profiles configured, where are the Global Data rates configured?

[Leo Laohoo]

Wireless > 802.11b/g > Network.

Look at the right-hand side called "Data Rates".  What rates are Disabled, Mandatory & Supported.

[Capricorn]

Hi!

What data rates are enabled globally or RF Profiles? 

I have attached the picture for that.

Is there any bandwidth contract enabled or AVC enabled on the SSID?

I can see that Downstream and Upstream for every thing under Override per-user bandwidth contracts and per SSID is set to 0

AVC: Application Visibility is not enabled.

So what radio is/are the client(s) connected on?

Can you tell me the command.

Cannot find via show client detail mac.

[Leo Laohoo]

Is there any bandwidth contract enabled or AVC enabled on the SSID?

Depending on what firmware version is loaded on the WLC, you can specify a bandwidth contract (aka traffic shaping policy) on a per-SSID or per-user bases.  AVC can also specify which known protocol or application can be traffic shaped.

So what radio is/are the client(s) connected on?

On the front page of the controller, left-hand side, go to Clients.  Find the MAC address of the specific clients using the filter.  Once there, you should be able to see what is the data rates used by the clients as well as what radio the clients are connected on.

[Capricorn]

The data rate is 6.0,9.0,12.0,18.0,24.0,36.0,48.0,54.0

and I can only find the Radio word with Radio slot id with value of 1.

[Leo Laohoo]

and I can only find the Radio word with Radio slot id with value of 1.

Radio Slot 0 = 802.11b radio

Radio Slot 1 = 802.11a radio

The browsing speed via WIFI is really slow like 5 Mbps.

What wireless client is this?

[Capricorn]

Hi!

Here is the info.

(Cisco Controller) >show client detail acfd.ce2a.1408
Client MAC Address............................... ac:fd:ce:2a:14:08
Client Username ................................. host/mypc
AP MAC Address................................... 8c:b6:4f:a6:8f:d0
AP Name.......................................... AP18-Sal
AP radio slot Id................................. 1
Client State..................................... Associated
Client User Group................................ host/Mypc
Client NAC OOB State............................. Access
Wireless LAN Id.................................. 1
Wireless LAN Network Name (SSID)................. MySSID
Wireless LAN Profile Name........................ Myssid
Hotspot (802.11u)................................ Not Supported
BSSID............................................ 8c:b6:4f:a6:8f:df
Connected For ................................... 192 secs
Channel.......................................... 136
IP Address....................................... 10.x.x.x
Gateway Address.................................. Unknown
Netmask.......................................... Unknown
IPv6 Address..................................... fe80::d0aa:458e:cf5:c76f
Association Id................................... 8
Authentication Algorithm......................... Open System
Reason Code...................................... 1

--More or (q)uit current module or <ctrl-z> to abort
Status Code...................................... 0
Client CCX version............................... 4
Client E2E version............................... 1
Re-Authentication Timeout........................ 86232
QoS Level........................................ Silver
Avg data Rate.................................... 0
Burst data Rate.................................. 0
Avg Real time data Rate.......................... 0
Burst Real Time data Rate........................ 0
802.1P Priority Tag.............................. disabled
CTS Security Group Tag........................... Not Applicable
KTS CAC Capability............................... No
Qos Map Capability............................... No
WMM Support...................................... Enabled
APSD ACs....................................... BK(T/D) BE(T/D) VI(T/D) VO(T/D)
Current Rate..................................... m15
Supported Rates.................................. 6.0,9.0,12.0,18.0,24.0,36.0,
............................................. 48.0,54.0
Mobility State................................... Local
Mobility Move Count.............................. 0
Security Policy Completed........................ Yes
Policy Manager State............................. RUN
Audit Session ID................................. 0af4dc230001a34759944324

--More or (q)uit current module or <ctrl-z> to abort
AAA Role Type.................................... none
Local Policy Applied............................. none
IPv4 ACL Name.................................... none
FlexConnect ACL Applied Status................... Unavailable
IPv4 ACL Applied Status.......................... Unavailable
IPv6 ACL Name.................................... none
IPv6 ACL Applied Status.......................... Unavailable
Layer2 ACL Name.................................. none
Layer2 ACL Applied Status........................ Unavailable
Client Type...................................... SimpleIP
mDNS Status...................................... Enabled
mDNS Profile Name................................ default-mdns-profile
No. of mDNS Services Advertised.................. 0
Policy Type...................................... WPA2
Authentication Key Management.................... 802.1x
Encryption Cipher................................ CCMP (AES)
Protected Management Frame ...................... No
Management Frame Protection...................... No
EAP Type......................................... PEAP
Interface........................................ finance
VLAN............................................. 205
Quarantine VLAN.................................. 0
Access VLAN...................................... 205

--More or (q)uit current module or <ctrl-z> to abort
Local Bridging VLAN.............................. 201
Client Capabilities:
CF Pollable................................ Not implemented
CF Poll Request............................ Not implemented
Short Preamble............................. Not implemented
PBCC....................................... Not implemented
Channel Agility............................ Not implemented
Listen Interval............................ 225
Fast BSS Transition........................ Not implemented
11v BSS Transition......................... Not implemented
Client Wifi Direct Capabilities:
WFD capable................................ No
Manged WFD capable......................... No
Cross Connection Capable................... No
Support Concurrent Operation............... No
Fast BSS Transition Details:
Client Statistics:
Number of Bytes Received................... 2066560
Number of Bytes Sent....................... 2265478
Total Number of Bytes Sent................. 2265478
Total Number of Bytes Recv................. 2066560
Number of Bytes Sent (last 90s)............ 1715679
Number of Bytes Recv (last 90s)............ 1578177

--More or (q)uit current module or <ctrl-z> to abort
Number of Packets Received................. 4649
Number of Packets Sent..................... 4125
Number of Interim-Update Sent.............. 0
Number of EAP Id Request Msg Timeouts...... 0
Number of EAP Id Request Msg Failures...... 0
Number of EAP Request Msg Timeouts......... 0
Number of EAP Request Msg Failures......... 0
Number of EAP Key Msg Timeouts............. 0
Number of EAP Key Msg Failures............. 0
Number of Data Retries..................... 2630
Number of RTS Retries...................... 0
Number of Duplicate Received Packets....... 3
Number of Decrypt Failed Packets........... 0
Number of Mic Failured Packets............. 0
Number of Mic Missing Packets.............. 0
Number of RA Packets Dropped............... 0
Number of Policy Errors.................... 0
Radio Signal Strength Indicator............ -61 dBm
Signal to Noise Ratio...................... 33 dB
Client Rate Limiting Statistics:
Number of Data Packets Received............ 0
Number of Data Rx Packets Dropped.......... 0
Number of Data Bytes Received.............. 0

--More or (q)uit current module or <ctrl-z> to abort
Number of Data Rx Bytes Dropped............ 0
Number of Realtime Packets Received........ 0
Number of Realtime Rx Packets Dropped...... 0
Number of Realtime Bytes Received.......... 0
Number of Realtime Rx Bytes Dropped........ 0
Number of Data Packets Sent................ 0
Number of Data Tx Packets Dropped.......... 0
Number of Data Bytes Sent.................. 0
Number of Data Tx Bytes Dropped............ 0
Number of Realtime Packets Sent............ 0
Number of Realtime Tx Packets Dropped...... 0
Number of Realtime Bytes Sent.............. 0
Number of Realtime Tx Bytes Dropped........ 0
Nearby AP Statistics:
AP06-IT(slot 0)
antenna0: 120 secs ago................... -85 dBm
antenna1: 120 secs ago................... -85 dBm
AP17-HR(slot 0)
antenna0: 120 secs ago................... -77 dBm
antenna1: 120 secs ago................... -83 dBm
AP17-HR(slot 1)
antenna0: 121 secs ago................... -85 dBm
antenna1: 121 secs ago................... -97 dBm

--More or (q)uit current module or <ctrl-z> to abort
AP18-Sales(slot 0)
antenna0: 120 secs ago................... -68 dBm
antenna1: 120 secs ago................... -71 dBm
AP18-Sales(slot 1)
antenna0: 123 secs ago................... -66 dBm
antenna1: 123 secs ago................... -66 dBm
AP05-Legal(slot 0)
antenna0: 121 secs ago................... -80 dBm
antenna1: 121 secs ago................... -88 dBm
DNS Server details:
DNS server IP ............................. 0.0.0.0
DNS server IP ............................. 0.0.0.0
Assisted Roaming Prediction List details:

Client Dhcp Required: True
Allowed (URL)IP Addresses
-------------------------

AVC Profile Name: ............................... none

[sremk]

Are we using ipv6 here? if not, can we disable ipv6 and try?

You should be getting better speed based on the snr, rssi and data rate to which you are falling currently which is m15.

Radio Signal Strength Indicator............ -61 dBm
Signal to Noise Ratio...................... 33 dB

Thanks

Sreejith

[Capricorn]

Ipv6 is enabled on Dhcp server and its active on wired as well.

[sremk]

what is the speed we are getting for wired devices when connected to the same vlan?

Also can we do an iperf test ? please refer the below for the same.

https://supportforums.cisco.com/document/12068771/iperf-test-measuring-throughputspeed-wlan-client

Thanks

Sreejith

[sremk]

Hi Mate,

Can you get the show client detail <mac address> output from the command line of controller.

This will give us all the details like to which radio it is connected + rssi + snr + the data rate at which the client is connected.

Below is the small snippet of the output. As you can see, slot defines the radio(0 - 2.5 and 1 - 5 ). Also by looking at the channel, we will give get an idea of which radio they are connecting to as well.

(Cisco Controller) >show client detail 70:48:0F:A3:A9:1D
Client MAC Address............................... 70:48:0f:a3:a9:1d
Client Username ................................. N/A
AP MAC Address................................... 00:d7:8f:c8:a2:e0
AP Name.......................................... STL-WAP-MER-301-01
AP radio slot Id................................. 1
Client State..................................... Associated
Client User Group................................
Client NAC OOB State............................. Access
Wireless LAN Id.................................. 8
Wireless LAN Network Name (SSID)................. STLWIFI
Wireless LAN Profile Name........................ Staff Wifi Hidden
Hotspot (802.11u)................................ Not Supported
BSSID............................................ 00:d7:8f:c8:a2:e8
Connected For ................................... 16 secs
Channel.......................................... 36
IP Address....................................... 172.17.17.53
Gateway Address.................................. Unknown
Netmask.......................................... Unknown
IPv6 Address..................................... fe80::143b:c392:477e:6cde
Association Id................................... 200
Authentication Algorithm......................... Open System
Reason Code...................................... 1

Thanks

Sreejith

[biaacer2]

Are you using Flexconnect local switching?

My first approach would be to use iPerf, if you get decent speeds on the local network but not to the Internet, the issue may be somewhere else.

And the basic checks, Good RSSI, SNR and channel utilization.