OSPF comprehensively improves IP performance

Source: Internet
Author: User

Since its launch in 1990, the Open Shortest Path-first OSPF protocol enables routers to manage IP networks. The OSPF protocol is applied to the routing function, which enables various devices on the network to run efficiently.

Recently, OSPF has undergone a comprehensive upgrade. According to Internet Engineering Task Group IETF, OSPFv3OSPF 3rd currently supports forwarding IPv6 data on the network.

OSPFv3 improves versatility and enables the network to adapt to changing requirements. This simplifies the complex network and takes some enhancement measures to ensure easy upgrade. OSPFv3 is also optimized and the security is also improved.

The main purpose of OSPFv3 is to develop a routing protocol independent of any specific network layer ". To achieve this goal, the internal router information of OSPFv3 was re-designed. Unlike previous versions, OSPFv3 does not insert IP-based data into the header at the starting position of the packet and link status announcement LSA. OSPFv3 uses network protocol-independent information to execute key tasks that require IP header data in the past, such as identifying LSA that publishes route data.

In addition to modifying header data, OSPFv3 also redefined the role of LSA. In OSPFv3, tasks that publish network topology and IPv6 data are assigned to new and existing LSA instances.

For example, the OSPFv3 network and router LSA no longer publish IP data, and the router only uses them to identify the network design. OSPFv3 introduces two types of dedicated IPv6 information, namely, the domain Prefix Intra-Area-Prefix, And the link LSA, to announce the data deleted from these LSA. As IPv6 dependencies are reduced, it is possible to easily support new network protocols by improving OSPFv3 data packets and LSA. OSPFv3 has good versatility. It only requires a few network upgrades and can improve IPv6 performance without significant protocol migration.

OSPFv3 provides multiple optional functions, such as multicast OSPF, to achieve versatility. To achieve this goal, OSPFv3 has extended the data domains used by network devices to publish enabling function options. Most OSPFv3 vro information includes the option domain. devices running OSPFv3 can support up to 24 optional functions, whereas earlier versions only support 8 functions.

To simplify the construction of Complex Fault-Tolerant networks, OSPFv3 introduces the InstanceID and R-bit options. As a component of each OSPFv3 packet header, InstanceID no longer relies on the complex authentication scheme or access list required in the past to control the communication between vrouters in the shared physical network and OSPF domain. In addition to InstanceID, OSPFv3 can also use R-bit to make the final system of the server have effective redundancy.

OSPFv3 is completely different from previous protocols. It simplifies the message structure by providing non-inherent security. OSPFv3 messages can be authenticated and encrypted by using the Security packet header Integration System of IPv6 packets. In the past, it was necessary to add independent and complex protocols.

OSPFv3 provides more powerful functions and has a great deal of versatility, so that it can easily support new network protocols. The new features simplify network devices and operations, and the upgrade will not be so troublesome when OSPFv3 is used. Finally, the outdated parts in OSPFv3 have been deleted, and the security of OSPFv3 has been improved.

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