bgp

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BGP understanding to prevent Loops

The BGP protocol is a strategic Routing Protocol. Its complexity is not due to the complexity of routing algorithms. The most important thing is to use BGP to control the routing flow. Any routing protocol must first solve the loop problem. OSPFISIS uses the SPF algorithm to solve the problem. The OSPF algorithm is novel and a Diffusion algorithm, therefore, BGP

Bgp mpls/VPN Network Technology

Bgp mpls/VPN Network Technology BGP protocol has been well known for a long time. Its powerful routing policy tool capabilities and its storage and routing performance go beyond any internal gateway protocol of the image model, therefore, it exists as a "bridge" between autonomous systems. before that, there was an EGP protocol, and few people knew it, because it was not widely used, and it is not used by t

Introduction of routing protocol and BGP room

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 Gateway Protocol IGP and External Gateway protocol EGP two kinds. The internal gateway protocol is used in the autonomous system's internal routing, the external gateway protocol is used in the autonomous system routi

BGP attribute Detailed: Next-hop

In the IGP era, we all know, for example, OSPF, link state protocol, in the routing of the time, than the cost of the link, which link consumption will be more priority, if two of the same link consumption, then do load balancing. In fact, the 2 principles to achieve the OSPF---shortest path first work principle. What if, in BGP, there are multiple routes to achieve the goal, how should the choice be made? Which path is the preferred one? Take a lo

51-Advanced Routing: BGP Community properties: Local-as

First, the experimental topology:Second, the experimental requirements:1, R4, R1, R3, R2 respectively in the BGP process deployment neighbor Send Community attribute command;2, R4 deployment ACL crawl 4.4.4.4 traffic, Route-map named as, call ACL, set community Local-as, and call Route-map as out in the BGP process;3, verify: R1, R3 have 4.4.4.4, but R2 have no 4.4.4.0 route entry?Third, command deployment:

Basic knowledge of BGP

1. Characteristics Use the Tcp179 port to build a neighbor, not to use multicast or broadcast, so you can only set up a neighbor by hand unicast 2. Four kinds of packages Open package: For building a neighbor relationship, use only when building a neighbor, when the neighbor is established, no longer send KeepAlive package: Used to keep a neighbor relationship, it plus open is equivalent to the IGP Hello package. Send once every 60 seconds, holdtime 180 seconds Update package: Contains the

Key concepts of BGP/MPLS VPN

BGP/MPLSVPN Concept 1: VRF One of the security measures of BGP/MPLSVPN is routing isolation and information isolation. It is implemented through the VPN route Forwarding (VPNRouting Forwarding: VRF) Table and LSP in MPLS. On a PE router, there are multiple BGP/MPLSVPN concepts 1: VRF tables, which correspond to one or more sub-interfaces on the PE router, used t

Implementation of BGP Policy Routing

* BGP is designed to process a large number of Route entries.Control the bandwidth traffic in a certain transmission direction.1. Controllable attributes:· Local priority:It is valid for outbound traffic.Relatively speaking, it is a priority.· MED multi-exit identification:Injected by external EBGP, It is set by the Administrator outside of AS to affect this.To effectively control the traffic that leaves me.· Weight2. Control through route ingThe rout

Benefits of IDC Liu Yusheng with BGP dual-line data center

Before analyzing the advantages of BGP dual-line data centers, we should first understand the implementation methods of BGP dual-line data centers. Dual-line is a technical concept and can be implemented in many ways. At present, Chinese IDC providers have proposed several dual-line implementation methods, such as "CDN dual-line", "dual-IP dual-line", "Single IP multi-line", and "

The difference between BGP and IGP

is to realize the exchange and learning of routing information. The ability to implement routing BGP typically used in large networks, which can accommodate more routing information; IGP protocol, the amount of storage for routing entries is limited, such as OSPF agreement, which can only accommodate 1W routing; IGP is the internal gateway protocol, as internal implementation of routing information exchange;

49-Advanced Routing: BGP Community properties: no-advertise

First, the experimental topology:Second, the experimental requirements:1, R4, R1, R3, R2 respectively in the BGP process deployment neighbor Send Community attribute command;2, R4 deployment ACL crawl 4.4.4.4 traffic, route-map named PL, call ACL, set community no-advertise, and invoke Route-map pl out in the BGP process;3. Verify: View R1 in 4.4.4.4 Item details Are you carrying: no-advertise, and do not p

Optimization of BGP routing

If you have more than one Internet connection, you know that simply using the Boundary Gateway Protocol (Border Gateway PROTOCOL,BGP) makes it difficult to get the optimal routing path. At this point, the 7th signaling system without a telecommunications network is subtle (signaling system 7,SS7). As the control surface of the telecommunications network, SS7 can determine the best path before a call is established. There is no such control surface on

BGP protocol-neighbor PMTU Detection

BGP protocol-neighbor PMTU checks that the BGP protocol runs on TCP, so the TCP parameter settings will affect the performance of BGP. When the number of routes is small, the adjustment of TCP Parameters may not affect the BGP performance. However, when the number of routes is large, the adjustment of TCP Parameters ca

Design and application of BGP

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LAB-CCNP BGP Case Study

topologyObjectives: Plan, design, and implement the Internation travel Agency core network. Plan, design, nad implement the travel Data Providers Netwrok. Allow the networks to communicate via BGP. Verify that all implementations is operational and functional according to the guidelines. BackgroundThe International Travel Agency (ITA) needs both it core network and its travel Data Providers (TDP) network set up. Configre each

BGP large enterprise network engineering case 1

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BGP attribute Detailed: Local_pref

In the IGP era, we all know, for example, OSPF, link state protocol, in the routing of the time, than the cost of the link, which link consumption will be more priority, if two of the same link consumption, then do load balancing. In fact, the 2 principles to achieve the OSPF---shortest path first work principle. What if, in BGP, there are multiple routes to achieve the goal, how should the choice be made? Which path is the preferred one? Take a lo

Linux install Quagga to do BGP experiments

as an effort in the IT line struggle people, inspirational to do the following points:Moved the machine, played the system, proficient in the protocol, hit the code.--I want to keep my efforts!--------------------------------------------------------------------------------------------------------------- -------------------------- what is QuaggaQuagga software formerly known as Zebra is a GNU copyrighted software written by a Japanese development team. Quagga project started with 1996, the curren

BGP route selection principle and attribute detailed explanation: weight

In the IGP era, we all know, for example, OSPF, link state protocol, in the routing of the time, than the cost of the link, which link consumption will be more priority, if two of the same link consumption, then do load balancing. In fact, the 2 principles to achieve the OSPF---shortest path first work principle. What if, in BGP, there are multiple routes to achieve the goal, how should the choice be made? Which path is the preferred one? Take a lo

Anti-BGP routing?

650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/0435456332-0.jpg "title =" BGP Route reflector RR configuration extension diagram. JPG "alt =" 160508473.jpg"/> R1: Configuration En Conf t Int lo 0 Ip add 1.1.1.1 255.255.255.0 No shut Exit Int s0/0 Ip add 12.12.12.1 255.255.255.0 No shut Clock rate 64000 Exit Router VPN 1 No auto-summary Network 12.12.12.0 255.255.255.0 Network 1.1.1.0 255.255.255.0 Exit Router

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