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High RTT and packet Loss

cnrs-dsi
Level 1
Level 1

Hi

We use a WLC 4402 and 11 AP 1250.

My clients are Windows seven.

When they are connected to wireless, all my clients have randomly RTT peaks and packets Loss (2% average).

I enable link latency between AP and WLC. Max RTT are from 20 to 64ms.

Any idea ?

Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=5 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Délai d'attente de la demande dépassé.
Réponse de 172.16.242.9 : octets=32 temps=446 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=1 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=8 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=50 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=93 ms TTL=64
Délai d'attente de la demande dépassé.
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=4 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=2 ms TTL=64
Réponse de 172.16.242.9 : octets=32 temps=3 ms TTL=64

1 Accepted Solution

Accepted Solutions

Normally you should not have timeouts at this signal strength. What are you trying to ping by the way ?

any server on the LAN ? If its on the LAN and still getting timeouts, guess you should look at any interference sources which are operating on the same channel and eating up duty cycle.

regards

Joe

View solution in original post

8 Replies 8

Stephen Rodriguez
Cisco Employee
Cisco Employee

Honestly, to be expected.  Wireless is a shared media, so if client A is talkling, client B can not.  This is going to have some inherent loss, due to this.

Cheers,
Steve

--

If  this helps you and/or answers your question please mark the question as "answered" and/or rate it, so other users can easily find it.

HTH,
Steve

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wireless wlc
Level 1
Level 1

At what signal strengths are you seeing these losses ?

regards

Joe

91% (-54dB)

I'am really close from the AP.

Do you have power save mode enabled on your client ? Is so, disable and you should see some improvment. Although, look at what you posted this is normal behavor..

"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
___________________________________________________________

Normally you should not have timeouts at this signal strength. What are you trying to ping by the way ?

any server on the LAN ? If its on the LAN and still getting timeouts, guess you should look at any interference sources which are operating on the same channel and eating up duty cycle.

regards

Joe

Perhaps the cleint is roaming ... You will lose a ping or two ...

"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
___________________________________________________________

I try to ping a local wlc interface.

I have manually changed channels. Activate WMM on clients and it's look better.

Thanks for your help.

Scott Fella
Hall of Fame
Hall of Fame

Its really normal.. Here is a screen shot from my iPhone.

Sent from Cisco Technical Support iPhone App

-Scott
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