IS-IS Network Design Solutions

Obtaining Globally Unique NSAP Addresses

The Internet is composed of many separate IP network domains, which collaborate by sharing routing information to form the Internet's gigantic multinational and intercontinental framework. Each constituent network of the Internet is considered an independent routing domain or an autonomous system (AS).

BGP has stood the test of time to emerge as the only viable protocol for exchanging routing information between the many ASs that form the Internet. In the early days of the Internet, an alternative routing protocol based on CLNP called Interdomain Routing Protocol (IDRP) was proposed, but it was not widely adopted because of the ubiquity of IP and its dominance over CLNP. BGP provides flexible routing policies ...