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boozely25
New Contributor

Redundant Interfaces

This is my first Firewall Setup and my first post here so forgive me if this post is a little hard to follow

 

Here is my setup:

2 Fortigate 500D's in a HA Active\Passive

 

2 ISPs

each connected to a  switch (ISP1-->Sw1   ISP2---> SW2) by a single interface with the switches connected via crossover

The Switches are not stacked

 

SD-WAN

2 Redundant Connections WAN1(port1, port 2) WAN2(port3 ,port4)

 

My question:

Can I connect each individual port of the redundant interface to a separate switch

Port1--> Sw1(port1)  Port2-->SW2(port1)

or

do I have to create aggregate ports on the switches and connect both ports of the redundant interface to the aggregate ports on a single switch?

WAN1\Port1-->Sw1\port1

WAN1\Port2-->SW1\port2

 

Thank you

6 REPLIES 6
Anurag_Goyal
New Contributor

hi,

take a look on 

 

Anurag Goyal

Anurag Goyal
boozely25

So judging by this diagram, you cannot split the ports that make up the redundant interface to go to separate switches. Is that correct?

boozely25
New Contributor

Let me reword my question.  Can I connect each port of the redundant interfaces to different switches if the switches are not stacked and the switch ports are not aggregated(LACP).

dmcquade
New Contributor III

Yes this is possible. You will need to trunk the switches and create 2 VLANs (1 for each ISP subnet). Create 3 ports for each VLAN. For example, if VLAN10 is defined for ISP 1 and VLAN20 for ISP 2, you can do something like:

ISP 1 --> Sw1 port 1 (VLAN10)

ISP 2 --> Sw2 port 1 (VLAN20)

FW Primary WAN1 --> Sw1 port 2 (VLAN10)

FW Primary WAN2 --> Sw1 port 3 (VLAN20)

FW Secondary WAN1 --> Sw2 port 2 (VLAN10)

FW Secondary WAN2 --> Sw2 port 3 (VLAN20)

 

Make sure your trunk allows both VLANs

 

HTH

d

boozely25

Is there a way to do this without vlans?

dmcquade
New Contributor III

You don't need VLANs if each switch is dedicated to the ISP connected.

Primary Firewall WAN1 --> Switch1

Primary Firewall WAN2 --> Switch2

Secondary Firewall WAN1 --> Switch1

Secondary Firewall WAN2 --> Switch2

 

HTH

d

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