Multi WAN all in same Subnet

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Gidion
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2019/10/15 07:52:44 (permalink)
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Multi WAN all in same Subnet

Hello all,
 
I've got an ISP who gives me 3 internet lines (3 separate modems) that are in bridge. Now do all the modem have an IP that is in the same subnet a /24. I can't put the modems in router modus that would be the smart thing to do.
So my example situation is:
Line 1: 10.0.0.2/24 -> 10.0.0.1
Line 2: 10.0.0.5/24 -> 10.0.0.1
Line 3: 10.0.0.10/24 -> 10.0.0.1
 
So the IP is in the same subnet and the gateway is te same.
 
Now i need to do a loadbalance on my FG 81E with 3 lines.
After searching the internet i found 1 option that might work.
 
CLI:
config sys settings
set allow-subnet-overlap enable
end
 
 
 
Could anyone tell me if this  would work?
#1

2 Replies Related Threads

    sw2090
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    Re: Multi WAN all in same Subnet 2019/10/16 00:16:31 (permalink)
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    set allow-subnet-overlap enable is not really recommended. Thus might work.
    The better way could be to change the network settings of the modems if possible.
     
    #2
    emnoc
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    Re: Multi WAN all in same Subnet 2019/10/16 00:57:15 (permalink)
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    Agreed and static routes would be hard to deploy to the same next-hop if you want load-share. SDWAn would be wise here if not obvious ;)
     
    Ken Felix

    PCNSE,  NSE , Forcepoint ,  StrongSwan Specialist
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