Problem with Hardware Switch, no internet access

[sebat]

Hi people!

I am new here! Excellent this site and forum!

I have a problem with a Hardware Switch, we have two HW SW configured over one Fortigate 60E, one for Internal Lan (without DHCP, DHCP is windows server) and one more HW SW for free internet access (APs, etc) configured DHCP server.

The problem is...... with one ISP (Wan2), HW SW for free internet works ok, send IPs address fine and APs works fine, but making failover Wan2 to Wan1, with other ISP (Wan1) this HW SW hasn`t internet access and DHCP don`t works any more.

With HW SW for Internal Lan this problem not exist, access to internet is ok with wan1 or wan2.

I think, problem of DHCP Options..., Option Router or something.

I will configure DHCP Windows for this net free and then quit DHCP for this HW SW, for test if problem is in this way....

any suggestion?

Thanks a lot!

Sergio.