This guide is written to provide an alternative way to connect multiple routers in one. Connecting these routers via this way and not using an I-BGP protocol has some disadvantages and few advantages. One good feature is the stability while routing protocols may not have.

Disadvantages

• A lot of traffic between routers (Gigabit ethernet is needed)
• A lot of (virtual) interfaces that may confuse you
• Complicated setup

Advantages

• Only one router runs BGP
• Simple BGP configuration
• No problems that arise using internal routing protocols or confederations