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WRT Randomly Dropping Packets on LAN connection and wifi

Discussion in 'Networking Issues' started by aftermath, Oct 16, 2005.

  1. aftermath

    aftermath Network Guru Member

    I use the official firmware ( version 4.20.8 ) and the router keeps dropping packets after it has been running for a couple of hours.

    this happens when i ping the router from a pc that is directly connected to the WRT:
    Code:
    Request timed out.
    Request timed out.
    Request timed out.
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Request timed out.
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Request timed out.
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Request timed out.
    Request timed out.
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Request timed out.
    Request timed out.
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Reply from 10.93.1.1: Bytes=32 time<1ms TTL=64
    Request timed out.
    Request timed out.
    
    i have tried this with 3 pcs. 2 directly connected through a lan cable, and one with a wireless connection. the result is always the same.

    the longer the router is online the worse it gets.

    by the way, this happened with all the official firmware versions that i have tried. i used 2 us ones, and 2 european versions. its always the same. each time i update i hope that this error is fixed, but it keeps comming back.

    i also reset the configuration multiple times, thinking that it has something to do with that, but that didnt change anything either.
    am i the only one having this issue?

    if anyone has any idea what the problem is, please help me, because im really lost here!
     
  2. 4Access

    4Access Network Guru Member

    My guess is you're running some kind of p2p software that's using too much bandwidth, opening too many connections, or more likely both. Try toning down the p2p (it may have built in options to control the number of connections and bandwidth usage) or consider looking into the QoS options in the router.
     
  3. aftermath

    aftermath Network Guru Member

    ok, lets say youre right.

    what would i have to change in order to improve the situation?

    is there any linksys router that is able to handle this kind of network load?
     
  4. aftermath

    aftermath Network Guru Member

    i played around a little bit, and now i dont think that p2p applications are the problem.

    because the router also has problems when no p2p apps are running and im just accessing the web interface.

    it takes a few refreshes for it to display correctly, and the ping requests time out while its loading, and they start comming back, after the page has finished loading.

    maybe it really is a performance problem, but i dont think that its exclusively p2p related.

    i am not too familiar with firmware programming, so i dont know why the router is still having problems even after the p2p apps were closed? is it because the router is still choking on the connections that were open? maybe a log file is becoming too big, or something like that?

    is there anything i can do? id even buy a faster router, if its not too expensive!
     
  5. 4Access

    4Access Network Guru Member

    Yes. After closing the p2p app reboot the router and the problem should be gone.

    As for fixing the problem, like I mentioned before, check the options in the offending program and see if you can tone down the maximum connections the program opens. Additionally limit its bandwidth usage to less than what your DSL line is capable of. The QoS options can be found on the "Applications & Gaming > QoS" page. (Additionally custom firmware from DD-WRT & Sveasoft include advanced QoS functionality)
     
  6. aftermath

    aftermath Network Guru Member

    thank you for your replies they really helped me to understand the problem.

    unfortunately i dont think that qos will change much, because even if certain ports, or protocols have a higher priority, the router still has to examine every packet, in order to find out which packets it has to drop, and which to forward. in my opinion this causes even more processor load. and since the processor seems to be the bottleneck here, i think that leaving qos off, is the better choice.
    but please correct me if im wrong!

    anyway, is there any linksys router out there that has a stronger processor, and that can handle the amount of connections that todays p2p apps are opening?
     

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