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WRV200 DHCP handshake failure

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by mkcmkc, Dec 20, 2007.

  1. mkcmkc

    mkcmkc LI Guru Member

    I (perhaps foolishly) just bought a WRV200, and it won't shake hands correctly with my DSL modem (SpeedStream). I have a wireshark capture, which shows (D)iscover-(O)ffer-D-O-D-O and then nothing. In other words, it appears that rather than accepting the DHCP server's offer, the WRV200 just gives up. It will retry in the same pattern after about 60 seconds. The pattern itself is 3xDO, except that the very first time it's 1xDO followed immediately by the 3xDO. The 3 DO's are separated by about 2 seconds, and as far as I can see, all of the Ds and Os have the same content. The only thing obviously notable about them to my eyes is that the lease offered is for 30 seconds.

    The WRV200 will shake hands with my old D-Link router, which will in turn shake hands with the DSL modem, so I'm currently using them that way at the moment, though it seems kind of pathetic. Is there hope for a fix, or should I just return this thing? If the latter, can anyone recommend a solid 802.11g NAT router w DHCP?

    Thanks in advance.

    Mike (tutufan@gmail.com)
  2. mstombs

    mstombs Network Guru Member

    30second leases are a feature of half-bridge DSL modems. Another feature is strange netmasks and gateways - maybe the WRV200 doesn't understand them? Can you run the modem in any different mode?
  3. mkcmkc

    mkcmkc LI Guru Member

    I'm not sure. At a bare minimum it would require one trip through my provider's customer service system, which I'm not very excited about. I was sort of hoping someone from Linksys would be lurking that could pop up with some sort of quick fix. Lacking that I'm inclined to return it and the matching client cards and switch brands...
  4. DocLarge

    DocLarge Super Moderator Staff Member Member

    What exactly does your network setup look like?
  5. mkcmkc

    mkcmkc LI Guru Member

    It's dead simple. I have a SpeedStream DSL router that knows how to connect to my provider (PPPoE probably), and provides DHCP service to the one local port. In the config I was trying to use, I'd use that port as the WAN connection for the Linksys router. This ought to work as far as I can see, but it appears that the Linksys will not consummate the DHCP handshake (which I verified by inserting a dumb hub and sniffing the conversation).

    I had previously been using a D-Link router (not wireless) in the same way, and it does the handshake fine...

  6. mkcmkc

    mkcmkc LI Guru Member

    gave up

    Thanks for your comments. I decided to just exchange it--life's too short. Bought the TRENDnet equivalent. We'll see how it goes...
  7. DocLarge

    DocLarge Super Moderator Staff Member Member

    No worries.

    Sorry it didn't work for you. In the future, when you're using a DSL connection and trying to use an ethernet router behind it as your "internet facing router," be sure to put the modem into "bridge mode." This will turn the speedstream into a plain modem and allow your router to handle NAT'ing and all internet traffic on the WAN port (this is what would have worked on your WRV200).

    Be easy....

  8. mkcmkc

    mkcmkc LI Guru Member


    Thanks Jay.

    Just a final note: I hooked up the TRENDnet router and it also failed the DHCP handshake. So, I have a Windows XP box, a Linux host, a MacOS box, and a D-Link router that can all successfully shake hands with the DSL router, and a Linksys and a TRENDnet that cannot. Kind of frustrating.

    I did consider what I think you're suggesting. What puts me off of that is that the PPPoE password is in the DSL router, but I don't know it myself, so I'd have to find it out from my provider, and in my experience these calls are always hellish.


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