bgp border gateway protocol

10.1.1.1/24 through IGP (internal gateway protocol, such as OSPF protocol), we think EGP (external gateway protocol, such as BGP protocol) and IGP synchronization. During synchronizati

BGP protocol overview * BGP autonomous system-AS is a group of centrally managed routers that use the same internal gateway protocol and unified measurement values in AS internal routing groups, and use the external gateway

1. Route Selection Protocol The core of routing protocol is routing algorithm, the router uses routing protocol to generate routing table, which can realize the "best" path of the network packets. 2. Classification of routing protocols Routing protocol is divided into internal

BGP is a dynamic routing Discovery protocol between autonomous systems, and its basic function is to automatically exchange loop-free routing information between autonomous systems. As with OSPF and RIP protocols that operate within autonomous zones, BGP is a class of EGP (Edge Gateway

generate the most reasonable path (merge ). (The basic logic of RIP is: if A is 6 away from B and I am 1 Away From A, the distance from A to B is 7) For technical reasons (looping hops), rip considers that IP addresses over 15 cannot arrive. Therefore, rip is more used in the Internet (such as the entire China Telecom Network ). Such an internet part often belongs to the same ISP or has the same management organization, so it is called an autonomous system (as, autonomous system ). Hosts and

1. The router is also called the IP gateway, and the Gateway Protocol is the protocol for exchanging routing information between gateways.2. Autonomous systems:(1) Autonomous system is connected by the homogeneous gateway of the Internet, autonomous system within the

outermost layer of the network, the router in this range is the access point connecting the user to the ISP ｡ In the early stages of network development, the network structure is relatively simple (1). ISP only has one line to connect to the INTERNET. Generally, BGP is not used in this simple network structure, in this way, you can use simple and convenient static routes for interconnection. This simplifies router configuration, facilitates manageme

external management distance is 170. ◆ Bandwidth, relay, reliability, load, and information transmission units are measured. ◆ Supports equal-cost and non-Equal-cost load balancing. ◆ Other stability functions supporting route loops include horizontal split and toxicity reversal. ◆ Use the diffusion update algorithm (DUAL) to select routes without route loops and quickly aggregate them. ◆ Supports VLSM and automatic summary without category ). ◆ Border