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Can't get WAN Port to Synch to my Cable Modem (WRT54G v2)

Discussion in 'Cisco/Linksys Wireless Routers' started by MoiX, Sep 9, 2006.

  1. MoiX

    MoiX Network Guru Member

    Hi, I've just got hold of a WRT54G v2 and at first everything looked fine. I could connect to the routers oem webinterface, flashed to DD-WRT v23 SP1 (mini first then standard) and everythign went well, so then I moved onto connecting the WAN port to my SeTopBox (Cable TV/Cable Modem for NTL here in the UK), but couldn't get an IP address.

    There are a series of reboots & MAC registrations (the routers gets a temp ip from isp during this phase) with my ISP to go through normally when I've swapped routers before but it doesn't get this far......just ip

    The thing is the Internet LED is flashing which suggests to me the 2 ethernet ports on the STB & Router aren't synching up although if I plug the routers WAN port into my old router (a BEFSR41), it does seem to get a reasonably steady ON Internet LED (90% on rather than 50/50% flash) from that routers DHCP service.

    I've also flashed the router back to the latest oem linksys firmware, rebooted, powered off, the lot but still can't get the ethernet synch'd. I've tried different Cat5 leads but one thing I haven't tried is a crossed lead as I don't have one at home with me atm, but could make one up at work on Monday.

    So in the meantime, is the port goosed or do some model of routers actually require crossed cat5 leads between the WAN port & Cable Modem?

    Any other suggestions appreciated
  2. Guyfromhe

    Guyfromhe Network Guru Member

    Well I don't have an answer to your delema I can orffer a tad of insight for now i'll thnk about it and if I come up with something i'll drop another post.

    All Linksys products that i'm aware of that were made in the last 4 years (your router included) have auto MDI/MDI-X (basically you can use a crossover or not and the router will automatically take care of it and make it link)

    The flashing your seeing indicates activity. There is usually alot of activity on a cable network due to the way routing on the network works.
    If the light comes on at all that means theres a link.

    It's not flashing as much connected to your router because your router isn't sending or recieving anything or much.

    Have you talked to you ISP about any type of requirements or anything for connecting to their network? Do they need a specific mac or do you need to give them the mac of your router?

    Do you have it configured for DHCP?

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