WLC 2504 slow performance, slow internet

[Raj .G]

1 WLC 2504, 2 Access Points and 1 netgear prosafe router connected to Cisco sg300 switch. We have 16Mbps leased line for 30 members. The MRTG graph of leased line ISP shows very less usage of internet but the speed we experience is very slow browsing. All the devices are wifi connected(Macbook pro). I tested with a wired device and the browsing experience is good.

How do I troubleshoot this?. Can anyone help me addressing this issue?.

I can provide the necessary details such as client details, iperf stats as instructed!.

Thank you!

[Prabath Godevithanage]

Hi Raj,

how big is the difference between wireless and wired tests?Have you checked interfaces in the path for any errors and duplex mismatches ? 

have you done any tests between,wireless to wireless and wired to wireless?

Cheers,

Prabath

[Raj .G]

Hi Prabath,

I'm actually new to this wireless stuff. I just did the basic test, the speedtest.net shows fine on both wired and wireless but the browsing experience with the wireless is slow. I actually don't know where, how and what to test in this case.

I tried Iperf test between a wired and wireless clients, I was facing some segmentation fault error.

I need some instructions on how to troubleshoot and want to make sure that everything is fine from/to WLC.

[Raj .G]

Iperf results,

Client(wireless):

iperf -c 192.168.1.30 -P 6 –w 256k -r –t 60
iperf: ignoring extra argument -- –w
iperf: ignoring extra argument -- 256k
iperf: ignoring extra argument -- –t
iperf: ignoring extra argument -- 60
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size:  128 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.1.30, TCP port 5001
TCP window size:  129 KByte (default)
------------------------------------------------------------
[ 10] local 192.168.1.61 port 65089 connected with 192.168.1.30 port 5001
[  5] local 192.168.1.61 port 65085 connected with 192.168.1.30 port 5001
[  4] local 192.168.1.61 port 65084 connected with 192.168.1.30 port 5001
[  6] local 192.168.1.61 port 65086 connected with 192.168.1.30 port 5001
[  8] local 192.168.1.61 port 65088 connected with 192.168.1.30 port 5001
[  7] local 192.168.1.61 port 65087 connected with 192.168.1.30 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ ID] Interval       Transfer     Bandwidth
[  5]  0.0-10.0 sec  18446744073701023744 bits  4717894777821114156551698786611s/sec
[  6]  0.0-10.0 sec  25.1 MBytes  21.0 Mbits/sec
[  8]  0.0-10.0 sec  26.2 MBytes  22.0 Mbits/sec
[ 10]  0.0-10.1 sec  24.5 MBytes  20.4 Mbits/sec
[  7]  0.0-10.1 sec  14.6 MBytes  12.1 Mbits/sec
[  4]  0.0-11.8 sec  2.88 MBytes  2.04 Mbits/sec
[SUM]  0.0-11.8 sec  85.2 MBytes  60.5 Mbits/sec

Server(wired):

iperf -s -w 1000k
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 1000 KByte
------------------------------------------------------------
[  4] local 192.168.1.30 port 5001 connected with 192.168.1.61 port 65084
[  5] local 192.168.1.30 port 5001 connected with 192.168.1.61 port 65086
[  6] local 192.168.1.30 port 5001 connected with 192.168.1.61 port 65087
[  8] local 192.168.1.30 port 5001 connected with 192.168.1.61 port 65089
[  7] local 192.168.1.30 port 5001 connected with 192.168.1.61 port 65088
[ ID] Interval       Transfer     Bandwidth
[  7]  0.0-10.1 sec  26.2 MBytes  21.9 Mbits/sec
[  8]  0.0-10.1 sec  24.5 MBytes  20.4 Mbits/sec
[  6]  0.0-10.1 sec  14.6 MBytes  12.1 Mbits/sec
[  5]  0.0-10.2 sec  25.1 MBytes  20.7 Mbits/sec
------------------------------------------------------------
Client connecting to 192.168.1.61, TCP port 5001
TCP window size: 1001 KByte (WARNING: requested 1000 KByte)
------------------------------------------------------------
[ 15] local 192.168.1.30 port 54942 connected with 192.168.1.61 port 5001
[ 10] local 192.168.1.30 port 54938 connected with 192.168.1.61 port 5001
[ 11] local 192.168.1.30 port 54937 connected with 192.168.1.61 port 5001
[ 12] local 192.168.1.30 port 54940 connected with 192.168.1.61 port 5001
[ 13] local 192.168.1.30 port 54939 connected with 192.168.1.61 port 5001
[ 14] local 192.168.1.30 port 54941 connected with 192.168.1.61 port 5001
------------------------------------------------------------
Client connecting to 192.168.1.61, TCP port 5001
TCP window size: 1001 KByte (WARNING: requested 1000 KByte)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 192.168.1.61, TCP port 5001
TCP window size: 1001 KByte (WARNING: requested 1000 KByte)
------------------------------------------------------------
[  4]  0.0-11.9 sec  2.88 MBytes  2.03 Mbits/sec
[SUM]  0.0-11.9 sec  93.4 MBytes  65.9 Mbits/sec
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
connect failed: Connection refused
Waiting for server threads to complete. Interrupt again to force quit.
[ 15]  0.0-10.0 sec  18446744073706123264 bits  4719587868229426648974742560642s/sec
[ 11]  0.0-10.0 sec  18446744073706268672 bits  4719587868229463603844905343957s/sec
[ 12]  0.0-10.0 sec  18446744073706035200 bits  4719575598507060272550077615598s/sec
[ 13]  0.0-10.0 sec  18446744073706088448 bits  4719587868229417823931121597462s/sec
[ 10]  0.0-10.0 sec  18446744073706190848 bits  4716437589401407047237632721075s/sec
[ 14]  0.0-10.0 sec  18446744073706203136 bits  4716433347850670176884996021659s/sec
[SUM]  0.0-10.0 sec  18446744073689149440 bits  4716433347846310053771013900700s/sec

Any thoughts?