netwyman

Design Issues in Network Layer Network layer is majorly focused on getting packets from the source to the destination, routing error handling and congestion control. Before learning about design issues in the network layer, let’s learn about it’s various functions. Addressing: Maintains the address at the frame header of both source and destination and performs addressing to detect various devices in network. Packeting: This is performed by Internet Protocol. The network layer converts the packets from its upper layer. Routing: It is the most important functionality. The network layer chooses the most relevant and best path for the data transmission from source to destination. Inter-networking: It works to deliver a logical connection across multiple devices. Network layer design issues: The network layer comes with some design issues they are described as follows: 1. Store and Forward packet switching: The host sends the packet to the nearest route...

Following are the differences between OSPFv3 and OSPFv2- 1. Removal of addressing semantics: IPv6 addresses are not present in OSPF packets, except in Link-State Update (LSU) packets. Router and Network LSAs do not contain network addresses, but only contains topology information. OSPF Router ID, Area ID and Link-State IDs remain at 32-bits size- they cannot be assigned IPv6 addresses. Neighboring routers are identified by Router IDs only. OSPF v2 OSPF v3 2. Addition of Flooding scope: There are three seperate scopes for flooding LSAs-           Link-local scope -  LSA is flooded only on local link and no further. New Link-LSA uses link-local scope.      Area scope -  LSA is flooded in a single OSPF area. Router-LSAs, Network-LSA, Inter-area Prefix-LSAs, Inter-area Router-LSAs and Intra-area Prefix-LSAs use Area scope.      AS scope -  LSA is flooded throughout the routing domain. AS-external L...