CIS460 – NETWORK ANALYSIS AND DESIGN.ppt

CIS460 – NETWORK ANALYSIS AND DESIGN CHAPTER 6 – Designing Models for Addressing and Naming Overview Look at the guidelines for assigning addresses and names to internetwork components, including networks, subnets, routers, servers, and end systems Importance of using a structured model for network layer addressing and naming Importance of developing policies and procedures for addressing and naming Guidelines for Assigning Network-Layer Address Should be planned, managed and documented Rules for network-layer addressing Design a structured model Leave room for growth Assign blocks of addresses in a hierarchical fashion Use meaningful numbers Delegate authority if possible to regional/branch use dynamic addressing use private addresses with network address translation Using a Structured Model for Network-Layer Addressing Addresses are meaningful, hierarchical, and planned A clearly documented structured model facilitates management and troubleshooting With no model problems can occur Duplicate network and host addresses illegal addresses that cannot route on internet insufficient addresses addresses that cannot be used Using Meaningful Network Numbers In AppleTalk assign cable range for each network segment e.g., building number/floor number In Novell NetWare each network segment is assigned a 4-byte hexadecimal number Using building and floor numbers allow identifying and narrowing location of problems Administering Addresses by a Central Authority Corporate IS or enterprise network department should develop a global model for network-layer addressing In an IP environment can request block of numbers from an ISP or Internet Assigned Numbers Authority If from ISP request a large enough block for scalability Use private addresses as an alternative Distributing Authority for Addressing Determine who is to implement model if inexperienced networks administrators then keep it simple If branch/regional offices inexperienced then keep authority centralized Using Dynam