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bad pings from router

Discussion in 'Cisco/Linksys Wireless Routers' started by gregorian, May 15, 2005.

  1. gregorian

    gregorian Network Guru Member

    hi guys.. im using a WRT54G v2.2 with a ddwrt pre fv4 modified firmware.

    the problem im having is having a bad ping time between my computer and the router only every 60s or so. its ~1ms all the way and then 700-1000ms every now and then. its killing me while i play online games or while im streaming video.

    if i use a 100mbps rj45 to connect to the router i get <1ms throughout and the same 700-1000 ping every 60s or so.

    then i connect the wire to my cable modem to bypass the router. by pinging my isp i get 10-30ms for the duration of about 300s with no anomalies.

    this problem has been around since before i flashed the modified firmware.

    heres a cmd ping log i made to show u guys what it looks like

     
  2. Guyfromhe

    Guyfromhe Network Guru Member

    wow thats messed, have you tried factory resetting it already?
     
  3. gregorian

    gregorian Network Guru Member

    :(
     
  4. Guyfromhe

    Guyfromhe Network Guru Member

    you didn't answer the question... also does it have the same issue when the router is pinging the internet?
     
  5. gregorian

    gregorian Network Guru Member

    :( means no lol.

    well, if im not getting a consistent link from my router, anything passing through it to my computer will not be consistent as well.

    pinging my isp would give me 10-30ms and then a thousand every 60s or so. any ideas?

    im also suspicious as to why im only getting anomalous pings with a rather constant intervals..
     
  6. Guyfromhe

    Guyfromhe Network Guru Member

    you may want to try a reset, also I mean ping from the router itself to the ISP not from your computer..
     
  7. gregorian

    gregorian Network Guru Member

    sry im a nub i have no idea how to ping anything without my computer being the source
     
  8. Guyfromhe

    Guyfromhe Network Guru Member

    if you login to the web interface there should be a ping section under the admin section...
    alternatively if your running custom firmware you can login to telnet and ping like you do on your pc.
     
  9. gregorian

    gregorian Network Guru Member

    tried the reset to no avail.

    also, did an isp ping from the router's config page and got the same thing i was describing, except the anomalies are now 200-400ms long. regular pingtimes are 20-30ms.

    i ping'd my computer from the router and as expected, there were anomalies every minute or so. heres another log that looks nearly the same as the first one i posted ( this one is from router to wireless client)

    1 packet lost. well its definitely a problem that lies with the router's settings that's giving blips to whatever its communicating with (modem and client).
     
  10. jagboy

    jagboy Network Guru Member

    try a different mtu setting
     
  11. gregorian

    gregorian Network Guru Member

    ok good news and bad news. 1 have 3 computers wirelessly connected the to WRT54G.

    2 of them use the pci adapter and have this ping problem

    the last computer uses a usb wireless adapter and does NOT have this problem. the computers are not identical.

    tried MTU at 1500, 1492,1472,1460 no avail.

    im gonna switch adaptors to see if its a pci adapter problem
     
  12. jagboy

    jagboy Network Guru Member

    i have a fan on my router and i just did some pings of it and got somthig like
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=1ms TTL=64

    then i turned off the fan and i got
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
    Reply from 192.168.1.1: bytes=32 time=32ms TTL=64
     
  13. Guyfromhe

    Guyfromhe Network Guru Member

    i get consistant 1ms replies and very occasional 10ms.
     
  14. jagboy

    jagboy Network Guru Member

    \with or without a fan
     
  15. gregorian

    gregorian Network Guru Member

    the heat issues are quantitative (hotter->more latency). im haaving some alien problem with my wireless connection. cooling will not help here.

    1ms
    1ms
    1ms
    1ms
    1150ms
    1ms
    1ms

    i believe it can be totally removed with software settings on my computer. i dont know what it is.

    if occasionally you get 10ms over a bunch of 1ms's its just a random thing. dont forget my ping spikes are consistent at every minute and in the 4digit range. cheers
     
  16. kidkl

    kidkl Network Guru Member

    Hello, from what this sounds like its a duplex mismatch. You may on the computer that is having the issue verify that it is set to 10 auto or 100 auto. If it is then you may wanna try setting it at the router at 100 full and on the problem computer at 100 full.
     
  17. gregorian

    gregorian Network Guru Member

    i dont understand. from what i realise this is a WRT54G forum. how do i set 100/10 or any duplex mode on wireless?
     
  18. kidkl

    kidkl Network Guru Member

    Argh Reading though I didnt see that you said that it was wireless sounded like it was wired to me.
     
  19. jagboy

    jagboy Network Guru Member

    kidkl,
     
  20. gregorian

    gregorian Network Guru Member

    did more testing and found something useful.

    while 'ping -t'ing my router, i realise that i get the same kinda 4digit millisecond response whenever i refresh the detected connections page in XP.

    that is, everytime my adapter scans the area for a network, i get a lag. from what i believe this should not happen. i tested my guess on my 3rd system (the only one out of three on my network which doesnt have this ping problem), and whenever i manually instructed the adapter to scan for networks, the pings were not affected.

    something is seriously wrong with my other 2 systems. why do i get a communication gap whenever i scan for other networks? im thinking that my ping problem is caused by some windows service that makes my adapter scan for networks every minute thereby giving me these lag spikes....
     
  21. jagboy

    jagboy Network Guru Member

    i have noticed that windows can scan other networks and take upto 50% cpu usage on the computer
     
  22. gregorian

    gregorian Network Guru Member

    ive identified the source of this problem. and yes, its a program (service rather) thats causing all of it.

    it is windows' Wireless Zero Config service. the auto refresh of network scanning causes severe lags every minute it resyncs with the access point. happens if u manually command it to do so also.

    wireless zero automatically runs if windows detects a wireless device on your system. it is necessary for you to config your ddevice to communicate with an access point. people usually have 3rd party config programs like Linksys does, so disabling WZC shouldnt be a problem.

    my 3rd system which didnt manifest this ping problem had wzc disabled already (i didnt do it). i tried enabling it anyway and the computer didnt have the ping problems. that said, i pinpointed the reason why my other 2 systems were affected, but for others, wzc may not pose a problem to you.

    thanks to all the peeps who joined the thread..cya!
     

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