BGP and DYNAMIC NAT for 2 ISP

[abusa]

Hi,

    I have a question regarding BGP setup with 2 ISP, I have 1 router connected with 2 ISP and my client want to use BGP but they want to utilized the 2 ISP connection by seperating path of two subnet inside my network going outside my network. Is it possible to create dynamic NAT on the 2 port of my router going ISP in BGP setup?

Thanks

[paul driver]

Hello
Yes it is possible to load share/nat between either ISP,
However your client may be wishing for something that ist even feasible, So can you elaborate a little on this.

You mention BGP so are your sure you require it BGP, Usually BGP peering’s to an ISP is via an enterprise service (eg:mpls) however your OP suggests you have DIA (Direct Internet Access)  which means you do not require BGP unless you own a public ASN?

Also will the ISPs be providing you with either a full/partial routing table or just a default route.

Are you running any interior routing process such as ospf/isis/eigrp?

[abusa]

Hi @paul driver ,

       Client wanted to use the BGP and also, they have own ASN. Although we know that BGP is path vector protocol to select best path. But client want to utilize the 2 ISP by creating policy and attributes to have specific destination path base on the subnet and criteria that they want. Please see diagram

They have Fortinet Router and C8200L connection, between connection they created 2 subnets, and they want these 2 subnets to become outside NAT of Fortinet router and Inside NAT of C8200L. Since it was separated subnet, client want subnet 1 will traverse on ISP 1 and the other ISP 2. Is it feasible since the Internet connection configured in BGP protocol? And is it also feasible to configure IP SLA if noticed that the connection of the dedicated ISP is down to have HA on ISP connection?

Thank you