1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Problem: WAN -> WLAN slow (30 MBit), WAN -> LAN fast (80 MBit)

Discussion in 'Tomato Firmware' started by mensa, Mar 14, 2017.

  1. mensa

    mensa Network Guru Member

    Hello I would really need your help please.

    Since some days I have a mysterious problem here. I am running an Asus RT-AC3200 with Tomato Shibby 138.
    My Internet connection is 80 MBit/s download and 20 MBit/s upload. Until some days ago I was able to reach nearly that values at speedtest.net on all my LAN + WLAN devices. But since 5 days or so, only LAN wired devices does reach that values.

    All WLAN devices now only reach 30 MBit/s download and 20 MBit/s upload. But I did not change anything and my WLAN speed locally is good (I am able to copy files over WLAN at around 45 MB/s -> ~360 MBit/s when I am around 1 meter away from my router).
    I tried it with a MacBook Air (early 2014, 802.11ac) and an iPhone 7. I tried on both 2,4 GHz and 5 GHz and same problem. My WLAN channels are not really crowded (I also used InSSIDer to find free, none overlapping channels).
    I also put a 30 meter Cat.6 cable from my DSL modem down to the cellar and created my test WLAN with my Asus RT-AC3200 (and also a Linksys E900) there (where not even one other WLAN appears). Result: Same problem, I get only 30 MBit/s internet download over WLAN. When I plugin the network cable I get 70 - 80 MBit/s.
    I also erased NVRAM completely, flashed router, tried only with basic, necessary configuration and also tried Asus stock firmware. Result: Same problem.
    I don't think, that my iPhone and MacBook are broken or too slow, cause they also get very good speeds locally in WLAN. It seems as if not the WLAN is the problem. The only problem seems to be WAN -> WLAN.

    But what the hell could that be, that my router(s) can't get more throughput from WAN to WLAN and that only since some days. Before it worked fast everywhere.
    What else could I try to locate and fix that problem?
     
  2. maurer

    maurer LI Guru Member

    have you introduced any new wireless device in your house like a baby monitor, cordless phone...etc - something is affecting your wifi. try to scan your home with "inssider"
     
  3. pomidor1

    pomidor1 Reformed Router Member

    maybe it's a stupid idea
    but if you have enabled the CTF adwnced / miscell ... CTF on?
     
  4. mensa

    mensa Network Guru Member

    No.

    My Wifi is very fast, as I wrote I can transfer with around 360 MBit/s internal.

    I think you did not read my post. As I wrote I used InSSIDer to find free and non overlapping channels. As I also wrote, I even tried it in the cellar, where not even one other Wifi is available.
     
  5. mensa

    mensa Network Guru Member

    It's that mysterious, that also stupid ideas are welcome ;) (but I don't think your's is stupid).
    CTF was always off. I activated it now, but there is no change. :(
     
  6. pomidor1

    pomidor1 Reformed Router Member

    next stupid idea;-)
    ssh and mtd-erase2 nvram and reboot?
    but again you have to set the router with a finger

    no and if you do not need to QOS of?
     
  7. mensa

    mensa Network Guru Member

    Sorry, but I don't understand. What exactly should I do?
    Type that command "mtd-erase2 nvram" via SSH? What's the difference to "Erase all data in NVRAM memory (thorough)" in Web UI?

    I don't need QOS and had never activated it. Is that ok?
     
  8. pomidor1

    pomidor1 Reformed Router Member

    Qos quarrel with ctf
    And so cleaning nvram can be done in a variety of ways, so the same
    Well so it does not help it actually may need to look for an external reason rather
     
  9. mensa

    mensa Network Guru Member

    Why external reason?
    My Wifi transfer rates inside my network are pretty fast.
     
  10. pomidor1

    pomidor1 Reformed Router Member

    wan speed,DSL modem, isp problems, etc
     
  11. Monk E. Boy

    Monk E. Boy Network Guru Member

    Most of Tomato doesn't cooperate with CTF enabled because CTF basically bypasses large sections of iptables. However enabling/disabling CTF will affect WLAN & LAN traffic equally, so if your LAN is working fine you probably don't need CTF.

    So your WLAN to LAN speeds are high? Not capped at around the same speeds? Because the latter would indicate an interference issue.
     
  12. mensa

    mensa Network Guru Member

    But my tests say, that none of these things can be the problem.

    WLAN <-> LAN speed is around 360 MBit/s, so it's very good.
     
  13. Sean B.

    Sean B. Addicted to LI Member

    I have next to no experience with Apple products, but any chance your MacBook and IPhone did any kind of auto update such as Windows does? One of Windows 10 anniversary updates many months ago screwed up the dhcpv6 client and I didn't realize it had even done an update. After many futile hours of trying to debug and diagnose wtf had broke with dnsmasq etc on the router I finally figured out it was on the client side via WireShark captures showing Windows 10 not responding to the routers initial reply.. but would then respond normally if you manually renewed via IPconfig. It's a long shot but perhaps Apple pushed out some update that has messed with the wifi and/or network stack of their products.
     
  14. pomidor1

    pomidor1 Reformed Router Member

  15. maurer

    maurer LI Guru Member

    you mentioned that you tried with asus stock firmware and you get the same results - then it's not a tomato problem but a hw issue - try a RMA and get a new unit.

    or...try merlin firmware :)
     
  16. mensa

    mensa Network Guru Member

    Hello, I also thought, that my Asus RT-AC3200 was broken, so I bought a new one today and found out the following:

    - It seems that I only get slow WAN -> WLAN speed (30 MBit), when I am connected in 2.4 GHz band with my MacBook. But internal file transfer from LAN to WLAN is around 100 MBit.

    - When I use 5 GHz band with my MacBook I get full speed WAN -> WLAN (80 MBit) and also full speed LAN to WLAN (around 450 MBit when I am very near to the router).

    - On my iPhone 7: No matter which band I use (2.4 or 5 Ghz), I get only WAN -> WLAN speed of around 35 MBit. So maybe that's really a problem of my iPhone. I will ignore that at the moment.

    But now I need your help, how to get full speed also in 2.4 GHz band back again. It worked until the last weekend also with 80 MBit WAN -> WLAN and there was really no change.

    I use different names for every SSID now, but I don't think that it will change anything. I had the same SSID name on 1 router and 1 AP for 3 x 5 GHz and 2 x 2.4 GHz SSIDs and it worked everywhere with full speed.

    What else could I try?
     
  17. pomidor1

    pomidor1 Reformed Router Member

     
  18. mensa

    mensa Network Guru Member

    Ok, will try Merlin then.
    Which rates should I be able to reach in 2.4 GHz band when there are not much interferences?
     
  19. maurer

    maurer LI Guru Member

    i got 100+mbps in 2.4g band using my good ol' RT-N16 (device from 2010)
     
  20. mensa

    mensa Network Guru Member

    Internal I get that 100MBit also, but WAN -> WLAN only 30 MBit :(
     
  21. Elfew

    Elfew Network Guru Member

    IT is fine, cable is better than wireless
     
  22. mensa

    mensa Network Guru Member

    What means IT?
    BTW: Hard to plug a network cable into an iPhone.

    Edit: Tried Merlin firmware now. Result: Same problem, only 30 MBit WAN -> WLAN in 2.4 GHz band.
     
  23. kthaddock

    kthaddock Network Guru Member

    I think it is a sort problem here. 30MB (megabyte )= 240Mb (megabit)
     
  24. Sean B.

    Sean B. Addicted to LI Member

    Any new/different wireless devices connected to the AP? If a device has been connected to the AP that is using B/G etc instead of N or AC it can slow the faster devices down.
     
  25. mensa

    mensa Network Guru Member

    No it is not. I get only 30 Megabit/s at WAN -> WLAN (in 2.4 GHz band).
    But around 105 Megabit/s (in 2.4 GHz band) at LAN -> WLAN.
    And 80 Megabit/s at WAN -> LAN.
     
    Last edited: Mar 16, 2017
  26. mensa

    mensa Network Guru Member

    No, and I also tried it with a long Cat6 cable in a bomb shelter in my cellar where no other interference is. All other APs and wlan devices powerd off before. Same problem there.
     
  27. mstombs

    mstombs Network Guru Member

    Seems to be an old fashioned TCP/IP window scaling problem. If downloading from the internet from site with high ping can't get continuous download if settings not correct, but local devices don't have same pauses waiting for acks etc. 10 years ago we used to have to hand-tune these things, but modern OSes should auto-tune?

    http://www.speedguide.net/analyzer.php
     
    Last edited: Mar 16, 2017
  28. txnative

    txnative Serious Server Member

    Have you switched back to Shibby? If so you could check in the advanced, wireless, apsd if enabled>disable it, Interference mitigation can be manipulated to either auto noise reduction, or auto to suit your environment, you can also manipulate the 802.11n preamble to green field, try a different country, maybe turning transmit power down to 24 or lower, on the device list the button is suppose to do some sort of reset on mine it reset to from a 100 dbm to -92 dbm on both radio even though we are using different hardware but the principle is the same, but the apsd i would disable it unless it has been fixed?
     
    Last edited: Mar 16, 2017
  29. maurer

    maurer LI Guru Member

    it could also be a problem with the speedtest server.
    you should try sourcefourge.net/speedtest AND dslreports.com/speedtest
     
  30. Elfew

    Elfew Network Guru Member

    Guys, come on! You cannot compare speeds over wire and wireless...
     
  31. mstombs

    mstombs Network Guru Member

    Learnt that a long time ago, wrt54gsv1.1 was advertised as having speedbooster 125 Mbit/s , but even in ideal wireless conditions couldn't get much more than 30 Mbit/s in one direction (half duplex) in 54G mode. Not a patch on the then current 100 Mbit/s Ethernet which was full duplex and able to achieve 80 Mbit/s in both directions in real tests. Much more overhead in wireless, but marketing hype gets worse...
     
  32. mensa

    mensa Network Guru Member

    @Elfew Don't you understand?
    My local WLAN is faster than my WAN connection, but I still only get WAN -> WLAN (2.4 GHz) througput of 30 Megabit/s altough my internal WLAN works with nearly 100 Megabit/s.

    My WAN connection speed is 80/20 Megabit which I also reach nearly at everyspeed test with wired clients or 5 GHz WLAN.

    I made some iperf3 tests to show what I mean:

    PC (LAN) to PC (LAN):
    [​IMG]

    MacBook (same results under Mac OS and Windows BootCamp) with onboard WLAN chip (5 GHz) to PC (LAN):
    [​IMG]

    MacBook (same results under Mac OS and Windows BootCamp) with onboard WLAN (2.4 GHz) to PC (LAN):
    [​IMG]

    PC with Asus USB-AC56 dongle (5 GHz) to PC (LAN):
    [​IMG]

    PC with Asus USB-AC56 dongle (2.4 GHz) to PC (LAN):
    [​IMG]

    So you can see that all my Wlan clients are fast enough to handle 80 Megabit/s. That 80 Megabit/s do arrive at WAN port of my router and the router is able to put that through without loss to LAN and WLAN 5GHz clients, but for any reason not able to put it through to 2.4 GHz WLAN clients. I just don't understand that.

    @txnative
    Thanks for that suggestions. I tried a lot now, but it did not help me :(
    I even turned of security. Nothing helps, I really don't understand it anymore.

    And the best thing is: It worked with full 80 Megabit/s in 2.4 GHz until 1 week ago! And there was no config change and no new devices or interferences.
     
  33. pomidor1

    pomidor1 Reformed Router Member

    are you sure?
    how far you have neighbors many devices suitable now in the band 2.4, speakers, etc.
    2.4 is now lottery
     
  34. mensa

    mensa Network Guru Member

    Yes I am sure.
    I live in a house on the land, only one direct neighbour.
    I already tested with a long Cat6 cable in a bomb shelter in my cellar. There is no interference and there is the same problem.

    Why are you always thinking that my 2.4 GHz WLAN or interferences are the problem? As you can see I have at least nearly 100 Megabit/s in 2.4 GHz WLAN. The only problem is WAN -> 2.4 GHz WLAN.
     
  35. pomidor1

    pomidor1 Reformed Router Member

    That he can be broken? although it is unlikely. Maybe you can replace it?
    or the one you need to try a different location
     
  36. mensa

    mensa Network Guru Member

    I already wrote, that I also thought, that the RT-AC3200 was broken, so I bought a new one and tested. Same problem.
    I tried it in a different place (cellar).
     
  37. pomidor1

    pomidor1 Reformed Router Member

    I would take (in your place) it is your router and strapped in another house to the Internet. Has checked whether the mistake and then reset the router settings to the default (cleaned nvram), and again check the l different location to eliminate the influence of the environment in your home
     
  38. mensa

    mensa Network Guru Member

    Just because of curiosity I tested WAN throughput of my RT-AC3200 with iperf3 now.
    I connected one PC to LAN1 and another to the WAN port (both using CAT6 cables) and got 1 Gigabit/s link.

    Throughputs are as follows:
    WAN -> LAN: ~ 340 Megabit/s
    WAN -> 2.4 GHz WLAN: 160 Megabit/s
    WAN -> 5 GHz WLAN: 240 Megabit/s

    LAN -> WAN (CTF disabled): 125 Megabit/s
    LAN -> WAN (CTF enabled): 340 Megabit/s

    So the router's "WAN/WLAN throughput interface" (or however one call that) can't be the problem as it seems. If I am honest, I thought, that the problem would be located here. But I was wrong as these results show.
    So now I really don't know how to continue or what else to test.
    My 2.4 GHz ist fast enough, my WAN throughput is fast enough, but I still get only 30 Megabit/s results at speedtest.net using 2.4 GHz WLAN (and everytime I do a speedtest shortly before or after that test over LAN or 5 GHz WLAN I get 70 - 80 Megabit/s).
    Absolutely frustrating :(
     
  39. mensa

    mensa Network Guru Member

    Thanks for that tip, but I don't know anyone here who has a faster internet connection than max. 30 Megabit/s.
     
  40. chitownbob

    chitownbob New Member Member

    Just fir

    Just for grins.... What channels are you using for 2.4 Ghz? Only valid ones are 1 or 6 or 11.

    Also what channel width are you using? I have found auto or 20 works better than 40, fir 2.4Ghz. Caveat.. I use stock linksys for router and stock asus for my wap.


    Sent from my XT1575 using Tapatalk
     
  41. Monk E. Boy

    Monk E. Boy Network Guru Member

    With 20Mhz 2.4 802.11n I usually see 50-60Mb. With 40Mhz 2.4 802.11n you can get 100Mb however since you're utilizing 75% of the available 2.4 802.11 spectrum it is very, very, very easy to have your performance impacted. In 5ghz I have no problem using 40Mhz channel widths since there's so many channels to use.

    Where your problem is I can't say. Since iperf shows your router and hardware is capable of reaching greater speeds I would guess the source of your woes are the speedtest.net or similar server you're using on your various platforms.

    I try to rely on ISP-based speed testing services hosted at the ISP itself, instead of websites like speedtest.net. e.g. For Brighthouse its speedtest.bhn.net, for Comcast its speedtest.xfinity.com... by not jumping outside your ISP's network you generally get a decent test of your connection rather than the slowest link between you and the speed testing server.
     
  42. chitownbob

    chitownbob New Member Member

    Monk E. At 2.4 Ghz 40Mhz my speed is better but not stable. May be problem with stock firmware that OP may not have with tomato or shibby.

    Sent from my XT1575 using Tapatalk
     
  43. chitownbob

    chitownbob New Member Member

    Still waiting to find out channel from mensa.

    Sent from my XT1575 using Tapatalk
     
  44. mensa

    mensa Network Guru Member

    Hi I tried channel 1, 6, 11 and 13! It does not matter, my WLAN throughput is always very fast and constant at around 95 Megabit/s or even 170 Megabit/s when using the Asus USB dongle. You can see that on the screenshots.
    Why do you want to search the problem in the WLAN when it is faster than WAN connection?
     
  45. mensa

    mensa Network Guru Member

    I did speedtests at my provider now and it's still the same problem.
     
  46. chitownbob

    chitownbob New Member Member

    And can you confirm channel width? If you are using 20 Ghz then you sounds like you are using half the available band... So your numbers look good to me.
    Perhaps you are set to auto and it switched from 40 to 20? Try forcing it to accept 40.
    Also consider changes may have been done at ISP level. Check firmware update on your modem. I can access read-only on my Arris at 192.168.100.1 although change might be on their servers.
    Finally, have you tried rebooting your modem?



    Sent from my XT1575 using Tapatalk
     
  47. mensa

    mensa Network Guru Member

    20 Ghz?
    I think you mean 20 MHz / 40 MHz. Yes I tried both. No change. My WIFI is always faster than my WAN speed and that's the part I don't understand, why I can't get my full WAN speed over WIFI.
    Modem firmware is the latest. Also will do a modem change now.
    But I don't think that it will help, cause how should the differ between WIFI and LAN packets when the WIFI is sent out by the router behind it? All packets are coming as LAN packets to the modem.
     
  48. maurer

    maurer LI Guru Member

    if you can try with a different wifi router
     
  49. mensa

    mensa Network Guru Member

    I already tried with another RT-AC3200 and also a Synology RT2600ac. Same problem everywhere.
     
  50. Monk E. Boy

    Monk E. Boy Network Guru Member

    This seems very odd to me. Do you have any other systems to test with besides these two? Since it's occurring with non-Tomato hardware, esp. the Synology, this really seems related to either the two platforms you're testing on or something ISP related.

    My MBP (macbook pro) is only 802.11n, which is why I see no need to go beyond an RT-N66 (my internet speed being capped below its limitations), but I certainly get more than 30Mb with it. I ran a test a couple weeks ago on an RT-N12 that's fed to a 150Mb line and it did 50Mb (there's a few N12s connected, so pfft if any single AP can only feed 50Mb, collectively they can hit 150Mb) using my MBP.
     
  51. maurer

    maurer LI Guru Member

    it's definitely something client related (less likely ISP related)
     

Share This Page