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Forum Discussion

Small-ISP's avatar
Small-ISP
Aspirant
Oct 06, 2022
Solved

/31 Subnets

I work for a ISP and just got off the phone with gentleman that that said he had a Nighthawk. When he tried to set a /31 it gave him an invalid subnet error. Searching here I see older posts saying t...
  • FURRYe38's avatar
    FURRYe38
    Oct 08, 2022

    Well would need to know what exact NG model. Users seem to use "Nighthawk" as a over all model for everything. NIghthawk covers many different models. There is is NON NIghthawk routers as well. 

     

    Is this for a Mobile Router? 

     

    The /31 maybe something supported on a ISP side of things however when it some to a LAN side and home users intended target of having multiple devices, this would not be something that NG would use nor be supported on the LAN side. LAN side for consumer home users generally have way more than two device, would not have a need for this kind of configuration and thus this configuration would not work. I just checked my XR1000 on the lan side for this and it's not taking the sub net mask for /31. So I presume NG doesn't support his kind of configuration on there routers. 

     

    /31 would be seen on point to point connections I would presume and thus mostly seen in maybe business or enterprise class environments. I would hope that more appropriate equipment would be used here and not a consumer grade low budget router if that kind of configuration is needed.