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Intermittent Packet Loss/Latency @Router (WiFi)

Discussion in 'Networking' started by fachmann, Apr 13, 2014.

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  1. fachmann

    fachmann Thread Starter

    Joined:
    Dec 10, 2006
    Messages:
    7
    I have spent close to two weeks trying to assess and resolve issues on the network at home. High latency and packet loss will be experienced intermittently. And I've discovered that the latency and packet loss actually originates at the WiFi level of the network.

    I've discovered this by monitoring my connection to various servers with PingPlotter (a program that basically logs and graphs tracert data). Whenever the issues are experienced, they becomes visible at the first hop, at the wireless router. These issues become quite notable when gaming online (though not restricted to this), and are present on all devices connected to the network, though not always simultaneously.

    A 2TB Apple Time Capsule is servicing our network. I've set it to run wireless on channel 11 (2.4GHz) and automatic (5Ghz), and all wireless clients are running at 802.11n. I've used a WiFi utility program called inSSIDer to check signals, interference, etc. No other network in the area interferes with our network, and signal strength runs at high strength across the house. Simply put, signal strength and interference do not seem to be likely causes of the issues at hand.

    I really don't know enough about higher level wireless network concepts to figure out what's going on. All I know is that the signal appears strong, channel interference is next to non-existence, the router is fairly new, and runs strong normally. However, issues appear at times, most notable when gaming online. And based on the information I'm getting, these issues exist primarily on the WiFi level, as packet loss and latency first display themselves in the Client > Wireless Router level.

    Don't know if it matters since the issues exist on the WiFi level, but my ISP is TimeWarner Cable (RoadRunner), and my modem is an Arris TM402G.

    Additionally, total client count on the wireless network can range from 8-14 (though issues have existed most recently with only a client count of 8).

    Here is an example of what I experience as recorded by PingPlotter (this occured while playing DotA2 with two clients on our network connected to the same server. *notice, eat.valve.net is the server that hosted the game.)
    [​IMG]
    *notice that this issue occurred during a game session, but the time surrounding the game session appears with no issue

    I would be happy to provide more information if needed. I do hope somebody out there can offer ideas or clues as to what might be going on. Thank you for your time and help! :)

    For convenience, I've listed details of possible importance below:

    ISP: Time Warner Cable (RoadRunner)
    Modem: Arris TM402G
    Wireless Basestation: Apple 2TB Time Capsule
    No other Access Points (DHCP server solely held by Time Capsule)
    Wireless Channel: 11 (2.4GHz), Automatic (5GHz)
    Radio Mode: Automatic (802.11a-n)
    Wireless Security: WPA2 Personal
    Client Standard: 802.11n
    Client Count: 8-14 any given time
     
  2. Couriant

    Couriant Trusted Advisor

    Joined:
    Mar 26, 2002
    Messages:
    32,394
    First Name:
    James
    Are you able to bypass the router to go direct to the modem for testing?

    Also can you do the ping test and trace route in the command line?

    ping -n 20 google.com
    tracert google.com
     
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