Multi WAN of same ISP - 200D (v5.4.4)

[hoaian83]

Hi all,

Please help me the following case as picture on FTG 200D. I have 2 internet line of same ISP (same gateway) and this is what I want for my network:

- 192.168.1.x -> WAN 1 (static ip)

- 10.1.1.x -> WAN 2 (static ip)

- Route 2 network layer above

As succeeded, 2 networks see each other, in/out through WAN 1 is OK, but I just can make out through WAN 2. The problem is that I cannot ping ip of WAN 2 from outside and cannot access 10.1.1.x through WAN 2 from outside.

Please help me config this in GUI.

Thanks,

Hoai An

[zeki893]

ya you'll need to use vdoms or another router/firewall to connect the 2nd link. You can't connect that link cuz it's on the same subnet and it would create a loop. 

Another option is you can ask your ISP to set it up as a 2x1G LAG then you'll have a 2G link.

[Carl_Wallmark]

Why would it create a loop ?

WAN1 and WAN2 would have different IPs, only use the same gateway.

however to use two interfaces on the same subnet you would have to enable "allow subnet-overlap"

config system settings

set allow-subnet-overlap

end

[zeki893]

two links to and from the same network without spanning-tree or LAG would be a loop

[Carl_Wallmark]

spanning tree is used for L2 networks and to prevent loops, this is still L3, where we route traffic to and from wan1 and wan2