This is an example of a small network that uses BGP routing connections to two ISPs. This is a common configuration for companies that need redundant connections to the Internet for their business.

This configuration is for a small company connected to two ISPs. The company has one main office, the Head Office, and uses static routing for internal routing on that network.

Both ISPs use BGP routing, and connect to the Internet directly. They want the company to connect to the ISP networks using BGP. They also use graceful restart to prevent unneeded updates, and use smaller timer values to detect network failures faster.

As can be expected, the company wants to keep their BGP configuration relatively simple and easy to manage. The current configuration has only 3 routers to worry about — the 2 ISP border routers, and the FortiGate unit. This means the FortiGate unit will only have two neighbour routers to configure.

This configuration has the added benefit of being easy to expand if the Company wants to add a remote office in the future.

To keep the configuration simple, the Company is allowing only HTTP, HTTPS, FTP, and DNS traffic out of the local network. This will allow employees access to the Internet and their web-mail.

This section includes the following topics: