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Does WET router have to be on a separate IP?

Discussion in 'HyperWRT Firmware' started by raysmd, Apr 15, 2006.

  1. raysmd

    raysmd Network Guru Member

    according to the example set forth on the thibor.co.uk wepage it seems that the WRT54G-B router has to use a different IP address as the AP.


    i.e., AP = 192.168.1.1

    WET = 192.168.2.1 (why can't I use 192.168.1.2)?


    Thanks
     
  2. grcore

    grcore Network Guru Member

    For WET mode the ip needs to be in the same subnet, in client mode the ip of the router needs to be on a different subnet.

    g
     
  3. Thibor

    Thibor Super Moderator Staff Member Member

    That's not strictly correct grcore; in WET mode the router's lan IP doesn't NEED to be in the same subnet. it can be, but performance may be improved if it isn't so that it's acting purely as a bridge.
     
  4. grcore

    grcore Network Guru Member

    But then you lose the ability to communicate with the WRT in WET mode, unless you change you client ip configuration.

    I am not sure I understand the advantage of not using an ip in the same subnet. Why wouldnt' it act purely as a bridge either way?

    g
     
  5. Thibor

    Thibor Super Moderator Staff Member Member

    why would you need to communicate with a bridge? once a bridge is established you shouldn't need access to it, and changing your ip to the other subnet to perform maintenance isn't exactly rocket science. i experienced some slowdown a while ago when i had my WET in the same subnet, changing it solved the issue.
     
  6. grcore

    grcore Network Guru Member

    I had experienced similar issues in WET mode, the link RSSI would be fine on both ends, but out of the blue traffic would mysteriously stop. Rebooting the WET wrt would sometimes cure the problem for a while.

    Technically this shouldnt have any effect, but I wonder if enabling STP would cure the source of the slowdown.

    doing further testing...

    g
     
  7. Thibor

    Thibor Super Moderator Staff Member Member

    stp is for removing loops in wds networks, not wet bridges. the dropouts and signal issues i had were solved by setting the LAN IP to a different subnet.
     
  8. grcore

    grcore Network Guru Member

    Au contraire, STP was specifically desgned for multi-bridge networks and in fact is also implemented in the other Linksys WET models.

    Now I agree it should not make a difference with only 1 bridge, but on the other hand having an IP in the same subnet should not make a difference either.

    My interest is finding out the cause, and perhaps contribute in some way to make it better. And along the way possibly learn something. My intent is not to downplay the current workaround, but rather to find out why.

    Without your development, this discussion would not even exist. And for that I say thanks for all you have done.

    G
     

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