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Introduction to the routing update mechanism of OSPF Dynamic Routing Protocol

One reason for OSPF's scalability is its route update mechanism. OSPF uses LSA to share route information among OSPF nodes. The broadcast information will be transmitted throughout the zone but will not go beyond the same zone. Therefore, every vro in the zone knows the topology of the zone. However, the topology of a zone is unknown to the zone. Considering that there are actually four different types of OSPF routers-intra-zone routers, Zone border routers,

A detailed description of routing protocols in computer networks

principle is simple, the realization is complex, uses the Dijkstra the shortest path algorithm proposed SPF. OSPF The main feature is the use of Distributed link state protocols rather than RIP such a distance vector protocol. the three points of OSPF and rip are different than RIP protocols . 1. send information to all routers in this autonomous system. The method used here is the flooding method (flooding)Flooding method (flooding)in the OSPF proto

"TCP/IP detailed Volume One" reading notes-----Dynamic routing protocol

1, the following conditions as long as there is an unsatisfied, you need to use a dynamic routing protocol: 1) network size is small, 2) only one connection point for connecting to other networks, 3) No redundant routers (typically used as backup)2, the so-called dynamic routing is each router and its own adjacent routers to exchange the information of their connected networks, so that their own routing table is always up-to-date, and different communication update mode, called different dynamic

BGP routing protocol "excellent" and "suffering"

16 bits starting from the left end of the address. The introduction of CIDR simplifies Routes Aggregation ), route aggregation is actually a process of combining several different routes, so that the route entry is changed from advertised to advertised, reducing the route table size 。 When a route is updated, the BGP routing protocol only sends updated routes, which greatly reduces the bandwidth occupied by BGP transmission routes and is suitable for transmitting a large amount of route informa

What is vrobgp BGP?

Border GatewayProtocol is a routing protocol that dynamically exchanges route information between autonomous systems. A classic definition of an autonomous system is a group of routers under the control of a management organization. It uses IGP and common measurement values to forward packets to other autonomous systems. The term

17.hcna-hntd--ip Routing Basics

The Ethernet switch works at the data link layer and is used for data forwarding within the network. The topology of the enterprise network is generally more complex, different departments, or headquarters and branches may be in different networks, it is necessary to use a router to connect to different networks, to achieve the data between the network forwarding.Learning Goals:1. Master the basic working principle of router2. Mastering the optimal routing method of Router selectionAutonomous sy

Routing protocol RIP, OSPF, BGP comparison

Dynamic routing protocols are divided into Internal Gateway Protocol (IGP) and External Gateway Protocol (EGP), depending on whether they are used within an autonomous domain. The autonomous domain here refers to a network with a unified management authority and a unified routing policy. The routing protocol adopted within the autonomous domain is called the Inte

Explain the virtual site properties in the VPN configuration

mechanism from the SP to the client side. Even with this approach, it is hoped that PE can reduce the target VPN configuration instance according to its own configuration. or/And forcibly add some target VPN properties. Rather, this attribute should be called the routing target property instead of the VPN target property. It only identifies some sites that can use the route, and does not care if the sites make up a VPN configuration instance. distribution routing in PE with BGP If a VPN's

How to solve the problem of "safety" in auto-driving car system by "deep reinforcement learning"? ...

Original source: ArXiv Author: Aidin Ferdowsi, Ursula Challita, Walid Saad, Narayan B. Mandayam "Lake World" compilation: Yes, it's Astro, Kabuda. For autonomous Vehicles (AV), to operate in a truly autonomous way in future intelligent transportation systems, it must be able to handle the data collected through a large number of sensors and communication links. This is essential to reduce the likelihood o

Fully describe the structure of a WLAN Switch

controllers and APs. Later, this article will explain the variables related to the second/third-layer movement in the centralized architecture, and finally point out some common incorrect ideas and actual situations about these architectures. This article uses the term wireless terminal (WTP) to refer to the AP, and the term Access Controller (AC) to refer to the WLAN control function (whether deployed on a WLAN switch or an independent Controller ). Autono

Resolve the differences and functions of OSPF in different regions

AS external route. Therefore, the Stub region must be configured for all regions on all vro interfaces in the same Stub region. For example, Area 0.0.0.3 in Figure 8-5 is configured as a Stub region because all external communications must have a single ABR--R3 for it. R3 advertises a default route distribution in the internal Area 0.0.3, rather than the external network in the Area. In the Stub region, it is specified that the external as lsa is not received, and the intra-region LSA is not se

OSPF route update mechanism

One reason for the scalability of o s p f is its route update mechanism. O s p f uses l s a to share routing information among o s p f nodes. The broadcast information will be transmitted throughout the zone but will not go beyond the same zone. Therefore, every vro in the zone knows the topology of the zone. However, the topology of a zone is unknown to the zone. Considering that there are actually four different types of o s p f routers-intra-zone routers, zone vbrs,

Six LSA types of OSPF

summary is generated by the ASBR but advertised by the API on behalf of the owner. it is a type of LSA with special E-bits issued by ASBR, and then forwarded to lsa4. category 5. autonomous system external LSAAutonomous system external LSA ., it is generated by ASBR and used to advertise the routes outside the autonomous system. It is flooding throughout the OSPF auton

In-depth discussion on the functions and functions of Dynamic Routing Protocol

large network, such AS the Internet, a very small Interconnect Network is divided into Autonomous systems AS (Autonomous System). Each AS is considered AS a self-managed Interconnect Network, an autonomous system uses the same routing policies and algorithms internally. A large company's network connected to the Internet is its own

--ip datagram, shard strategy, routing Table of Network Foundation

host D otherwise is indirect delivery execution (3).(3) If a specific host route with destination D in the routing table is routed to the next hop router indicated in the routing table, the datagram is executed otherwise (4).(4) If there is a route in the routing table that arrives at network N, the datagram is sent to the next hop router indicated by the routing table otherwise (5).(5) If there is a default route in the routing table, the datagram is routed to the default router indicated in t

Introduction to Layer 3 IP protocol and Routing

important for diskless workstation because the network layer address of the local machine is unknown when the diskless workstation system is started, but the IP address corresponding to the hardware layer address of the local machine can be found through RARP. Routing The Internet is composed of numerous networks, large and small, all over the world. It can transmit data between different networks. As an interface device connecting different networks, vrouters have been widely used. Their main

Doing kernel space in Linux user space

stuff ... I don't know what's going on outside the kernel, and I don't care. I only focus on what's happening in the kernel section. "On another geek cruise years later, Andrew Morton taught me another lesson, and I wrote:Kernel space is where Linux resides, and user space is where Linux uses it with other "natural materials." The distinction between kernel space and user space is similar to the difference between natural materials and human-made materials produced by humans. The difference is

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 pr

"Database" Oracle Trigger Foundation

,insert:new,delete:old; Second, the basic demo Description: When updating the child table, the name of the parent table is spliced with "123". Create orReplaceTriggerTest_trigger beforeUpdate on" Child" forEach rowDeclareOld_age number; New_age number; V_ID number; P_ID number;--pragma autonomous_transaction; -Autonomous transaction, independent of the transaction triggering the SQL beginOld_age: =: old.child_age; New_age: =: new.child_age; v

Oracle Foundation <1>-Stored procedures

Sys_refcursor; begin open emp_cur for select ename, SAL from EMP; Pro_emp_in (emp_cur => emp_cur); close Emp_cur; end;   --Calling a stored procedure with a cursor with an output typeDECLAREV_name EMP. Ename%TYPE; V_sal EMP. SAL%TYPE; Emp_cur Sys_refcursor;--declaring system cursor TypesBEGINPro_emp (emp_cur=Emp_cur); LOOPfetch emp_cur into v_ NAME, V_sal; Dbms_output. Put_Line ( ' name:|| V_name | | ' Sal: || v_sal); exit when emp_cur%end LOOP; close Emp_cur; END;

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