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Setting up ethernet bridge on a WAG300N without PPP

Discussion in 'Other Linksys Equipment' started by magnusak, Jun 26, 2007.

  1. magnusak

    magnusak LI Guru Member


    I have a static, public IP and want to use it directly on a (cisco) router behind my Linksys WAG300N. Now, for testing I am not using the cisco router, I'm only trying to set the static IP directly on my laptop being connected directly to my Linksys ADSL router.

    The problem however is that all tutorials I have seen for doing this indicate that you should set the ADSL router in "Bridge mode only" and then create a PPPoE connection on my computer. My ISP (telefonica, Spain) does not rely on PPPoE though since I have a static IP, they use IPoA.

    So my question is: Shouldn't I get internet if I simply set the Linksys in "bridge mode only" and then enter the public IP, subnet mask, gateway and DNS in IPv4 properties in Windows? Is there something I don't understand here?

    Any help is highly appreciated.
  2. mstombs

    mstombs Network Guru Member

    I wonder if IPoA is the same as UK/NZ PPPOA?

    If so you have to give the router the username/password and then run in "half-bridge" mode.

    No reason for a 4 port wireless router to have such a mode - which only works with one connected system - so I guess it doesn't have it as an option?
  3. magnusak

    magnusak LI Guru Member

    PPPoA is Point-to-point protocol over ATM while IPoA is IP over ATM. I think PPPoA (or PPPoE) is only needed when you need to authenticate with the ISP side. Since I have a static, public IP I guess my ISP sets some kind of static route and therefore don't need to authenticate me (and thus don't use PPP).

    I know my router is overkill for what I want to do, but it is the third router I try to configure for this setup and this time I wanted to try a Linksys one. This was the only one they had in the store.

    This router has, as you said, no half bridge mode. Could anyone suggest some other router that might work for this? Have anyone got experience with this type of situation?
  4. mstombs

    mstombs Network Guru Member

    In the UK most ISPs seem to use PPPOE or PPPOA even for static IPs - just get the same IP each time. The common way to handle your sort of problem seems to be to buy a range of static IPs, so one of the public IPs can be given to the modem, and NAT turned off in "no-NAT" mode. You then set up your other PCs with other public IPs specifying the modem as Gateway.

    Crazy thing is that the WAG300N runs GPL Linux, to do what you want should only be an "ifconfig" followed by a couple of "route" commands... but you have to get around the restrictions placed by the core logic configured from the web interface. Do you even get Telnet console access to busybox with the standard firmware?
  5. magnusak

    magnusak LI Guru Member

    I see that buying several public IPs and disabling NAT would do the trick. However, this will make my connection even more expensive and I guess I will still have problems getting support from my ISP.

    Instead I have found a workaround to the original problem and eliminated the need for a bridge. I am therefore taking the Linksys back to the store and will use the brandless router my ISP supports. A pity really, cause I really liked the Linksys.

    Thank you for trying, mstombs.

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