Hi all, I'm new to Meraki and this setup was done before I joined the company. In our office, we originally have one ISP with static IP. It is connected to port 44 on Meraki 01 with vlan 500, then port 47 also with vlan 500 and connect to WAN interface of Forti 01 (no vlan configured). Finally it will go up to port 48 on Meraki 01 and clients are connected to the Meraki switch stack with vlan 100. The IP was set on the WAN interface on Forti 01, and the gateway is set in the static route part in Fortigate as well. The red line shows current path from ISP to client: It has been working fine, clients can get DHCP IP from Meraki switches and can access internet. But now we have a secondary ISP with one so called "long-leased" DHCP IP as backup link. When setup following the same configuration with old ISP, we cannot get it work. The problem is when I set LAN3 in Fortigate to DHCP, it will get the correct IP but Meraki also acquired this public IP as it's "LAN IP", then the Meraki stack lost internet connectivity. But when I manually set the acquired IP in LAN3 in Fortigate, it cannot connect internet at all, so I must use DHCP for this interface. Also, for whatever reason, currently Meraki 02 is the active switch with port 48 showing "uplink". Will this affect the connection? As I tried failover Fortigate 02 (current primary) to 01, I lost internet connection as well. I think in ideal case both 01 should be the primary unit. Anyone had similar setup / experience can share their experience? Thanks in advance!!
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