IPv6 Transition Basic

IPv4 depletion 3rd Feb, 2011, the Internet Assigned Numbers Authority (IANA) assigned the last batch of 5 /8 address blocks to the Regional Internet Registries, officially depleting the global pool of completely fresh blocks of addresses. compatible IPv6 and IPv4 packets are not compatible on the wire. Put simply, when …

IS-IS Basic

ISIS and OSPF IGP link state protocol Link State database describes it’s neighbors and links connected to it PN pseudo node, extra router, convert Ehernet segment to star network with 0 cost DIS Designated IS (DIS), which is responsible for creating and distributing details of router PN LSP – Link …

BGP Basic

Border Gateway Protocol AS – Routers run by an operator under a single administration IGP – use common metrics to determine how to route packets within the AS BGP – Inter-Autonomous System routing protocol, the main routing protocol of the internet

OSPF Basic

OSPF LSA type LSDB Link State Database DR Designated Router, responsible for flooding process on the multi-access network. Each router on the network forms an adjacency with Designated Router. Backup Designated Router(BDR), DR failure BDR can very quickly take responsibility and become DR. LSA – Link-state Advertisement, Each router generates …

IP Basic

What is IP? 1) high level: networks, applications and services 2) Internet Protocol, a network layer protocol enabling the routing of data across a packet network using specific address schemes TCP/IP 1) Internet Protocol Suite, a set of communication protocols for the Internet and similar networks 2) IP is part …

IPv6 Basic

IPv6 called IPng(IP next generation) new version successor to IPv4 enhancement of IPv4 The shortage of IPv4 1) IPv4 address space is not enough IPv4 address, 32 bits, in theory can provide 4.3B, address allocation is not balance, US took half of space. 2) backbone router routing table is too …