IPv6 Essentials

IPv6 Essentials

Language: English

Pages: 414

ISBN: 1449319211

Format: PDF / Kindle (mobi) / ePub


If your organization is gearing up for IPv6, this in-depth book provides the practical information and guidance you need to plan for, design, and implement this vastly improved protocol. Author Silvia Hagen takes system and network administrators, engineers, and network designers through the technical details of IPv6 features and functions, and provides options for those who need to integrate IPv6 with their current IPv4 infrastructure.

The flood of Internet-enabled devices has made migrating to IPv6 a paramount concern worldwide. In this updated edition, Hagen distills more than ten years of studying, working with, and consulting with enterprises on IPv6. It’s the only book of its kind.

IPv6 Essentials covers:

  • Address architecture, header structure, and the ICMPv6 message format
  • IPv6 mechanisms such as Neighbor Discovery, Stateless Address autoconfiguration, and Duplicate Address detection
  • Network-related aspects and services: Layer 2 support, Upper Layer Protocols, and Checksums
  • IPv6 security: general practices, IPSec basics, IPv6 security elements, and enterprise security models
  • Transitioning to IPv6: dual-stack operation, tunneling, and translation techniques
  • Mobile IPv6: technology for a new generation of mobile services
  • Planning options, integration scenarios, address plan, best practices, and dos and don’ts

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addresses to publicly registered IPv4 addresses. IPv6 allocates two separate address spaces for link- and site-local use, both identified by their prefix. A link-local address is for use on a single link and should never be routed. It can be used for autoconfiguration mechanisms, for neighbor discovery, and on networks with no routers, so it is useful for creating temporary networks. Let's say you meet your friend in a conference room and you want to share files on your computers. You can connect

technology evolution. IPv6 product development and implementation efforts are already underway all over the world. IPv6 is designed as an evolutionary step from IPv4. It is a natural increment to IPv4, can be installed as a normal software upgrade in most Internet devices, and is 4 interoperable with the current IPv4. IPv6 is designed to run well on high performance networks like Gigabit Ethernet, ATM, and others, as well as low bandwidth networks (e.g., wireless). In addition, it provides a

area. This is done using an Inter-Area-Router-LSA. Figure 8-11 shows the usage of the Inter-Area-Router-LSA. Metrics of external routes are not compatible with OSPF metrics. ASBRs advertise external routes using one of two types of metrics, external-1 and external-2 routes. External-1 routes are considered to be close to the ASBR. Routers within the AS add the OSPF cost to reach the ASBR or the advertised forwarding address to the metric of the external-1 route. External-2 routes are assumed to

match the values set on the receiving interface. Next the E-bit and N-bit in the Options field are examined. The setting of these bits must match the value set on the receiving interface. At this point, if all the criteria matched, the packet is accepted and the neighbor is identified by its Router ID. For each neighbor on each interface, the router keeps a neighbor state machine. If there is already a full adjacency with this neighbor, the Hello timer is simply reset. Otherwise, state of this

route length field to zero and carries no IPv4 NLRI. All advertised or withdrawn IPv6 routes are carried within the MP_REACH_NLRI and MP_UNREACH_NLRI. The UPDATE must carry the path attributes ORIGIN and AS_PATH; in IBGP connections; it must also carry LOCAL_PREF. The NEXT_HOP attribute should not be carried. If the UPDATE message contains the NEXT_HOP attribute, the receiving peer must ignore it. All other attributes can be carried and are recognized. An UPDATE message could advertise IPv6 NLRI

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