February 2002
Intermediate to advanced
416 pages
10h 52m
English
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Addressing Concepts in Integrated IS-IS
This section is a short prelude to Chapter 4, “Addressing in Integrated IS-IS,” introducing only the key concepts for addressing in the IS-IS environment.
As a protocol originally designed for routing CLNP packets, IS-IS used the node-based addressing scheme of CLNP as its basic addressing premise. Integrated IS-IS, which can be used for routing IP packets, inherits many concepts from the original specification, including the CLNS addressing scheme for identifying network nodes. Therefore, it is a fundamental requirement that even when Integrated IS-IS is used in an IP-only environment, the nodes must have ISO NSAP addresses (referred to as NETs). However, IP requires the links to be addressed with IP subnets. ...
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