topic Re: High RTT and packet Loss in Wireless

High RTT and packet Loss

cnrs-dsi — Sun, 04 Jul 2021 02:41:55 GMT

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

Re: High RTT and packet Loss

Stephen Rodriguez — Wed, 19 Jan 2011 17:18:08 GMT

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

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Re: High RTT and packet Loss

wireless wlc — Thu, 20 Jan 2011 14:42:03 GMT

At what signal strengths are you seeing these losses ?

regards

Joe

Re: High RTT and packet Loss

cnrs-dsi — Fri, 21 Jan 2011 14:00:26 GMT

91% (-54dB)

I'am really close from the AP.

Re: High RTT and packet Loss

George Stefanick — Sat, 22 Jan 2011 06:13:11 GMT

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..

Re: High RTT and packet Loss

wireless wlc — Sat, 22 Jan 2011 20:39:52 GMT

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

Re: High RTT and packet Loss

George Stefanick — Sat, 22 Jan 2011 23:32:55 GMT

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

Re: High RTT and packet Loss

Scott Fella — Mon, 24 Jan 2011 02:24:27 GMT

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

Sent from Cisco Technical Support iPhone App

Re: High RTT and packet Loss

cnrs-dsi — Wed, 09 Feb 2011 12:11:11 GMT

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.