WRT54GP2 has very poor WAN-to-LAN throughput for TCP

Discussion in 'Cisco/Linksys Wireless Routers' started by TBarregren, Oct 25, 2005.

  1. TBarregren

    TBarregren Network Guru Member


    I have problem with a Linksys WRT54GP2 router, which slows down the WAN-to-LAN throughput from expected 2 Mbit/s to only 200-500 kbit/s. That is to say, the WLAN-to-LAN throughput for TCP is only 10-25% of the WLAN-to-LAN throughput for UDP.

    When replacing Linksys WRT54GP2 with a D-Link DI-614+ router, I measure 2,0 Mbit/s WLAN-to-LAN throughput for TCP as expected. Thats is of course also true when connecting directly to the modem.

    Thus, something is wrong with the Linksys WRT54GP2 router. What can I do to solve this problem?

    I have measured the throughput with TPTest 3.0.

    The router is connected to my ISP through a Linksys ADSL2MUE modem. The modem runs in "Bridge Mode Only" with dynamic IP. I have also tried the "RFC 1483 Bridge" mode with similar results.

    What can I do to solve this problem?

  2. danielhaden

    danielhaden Network Guru Member

    Possible solutions include:

    A very through hardware reset of the errant device.

    The current device cannot handle 16000 kbits speed through its router function, so use a high speed router, and use the wireless function through the switch (computer) ports, avoiding the wan port.

    Use QOS for a streamer, set to 13600, and use only mac address priorities.

    Use a Hawking hardware streamer device.

    The Linksys small office products are simply not designed to route though their Wan ports at 16000 kbits, 2000 kbytes speeds. You will probably have to use something else for your router.
  3. TBarregren

    TBarregren Network Guru Member

    I believe you missunerstood the speed. The speed on the WAN port is only 2000 kbit/s (e.g. 250 kbyte/s). Surely, Linksys small office products must manage that speed. After all, the WLAN speed is much higher.

  4. howardp6

    howardp6 Network Guru Member

    The WAN/LAN routing performance was measured at 33.7Mbs in ar review at www.tomsnetworking.com. For streaming the speed was 500Kbs. The WRT54GX offers 72.7Mbs WAN/LAN and the same streaming speed.
  5. TBarregren

    TBarregren Network Guru Member

    Great performance. But what can I have done wrong since I only get 0,2-0,5 Mbit/s when I expect to get 2 Mbit/s? Can I fix it with some configuration, possible through a "secret" page similar to Or could it be some sort of conflict between my ISP NIC and the router's WAN NIC? All ideas and suggestions are very welcome.
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