ospf commands

generates a new fourth class of LSA to describe how to reach the relevant ASBR, so that the class fifth LSA can have more than one ASBR to reach the same class Its advertising router and metric are different, indicating that they are generated by different ABR. Three lsdb containing As-external-lasIs the LSDB in RTA after synchronization, pay attention to the red part650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/70/75/wKiom1W4XaWz_00uAAEidLG-r90805.jpg "title=" 3.jpg " alt= "W

transmitted route information. This ensures that the router only accepts the route information sent from other routers with the same password and authentication information. I. Basic OSPF Configuration Router ospf command: Process-id is a number between 1 and 65535, which is selected by the network administrator. Process-id is valid only locally. This means that the value does not need to be matched when t

also advertise the destination address within the zone to which it is connected through the network rollup LSA to the backbone area. A default route that is outside a region and is still inside an OSPF autonomous system can also be advertised through this LSA. Use the command show ip OSPF database summary to display the network rollup LSA information in the link-state databases.N

. This ensures that the router only accepts the route information sent from other routers with the same password and authentication information.Basic OSPF ConfigurationRouter ospf command:Process-id is a number between 1 and 65535, which is selected by the network administrator. Process-id is valid only locally. This means that the value does not need to be matched when the router is adjacent.Configuration

The difference between OSPF and VPN is clearly the result of the rapid development of the Internet. TCP/IP has become the mainstream protocol for data network interconnection. Vrouters running on various networks are responsible for controlling traffic that may be the most important information of this century. The collaboration between hundreds of vrouters is inseparable from the routing protocol. OSPF and

configuration, OSPF has many complex optional configurations, such as the default cost value, tag value, etc. that are configured to introduce external routes, the OSPF authentication mode, the neighbor router, the passive interface, route filtering, and so on. OSPF area: Consists of a group of neighboring networks and routers that share a zone ID acros

Query the OSPF link status database on the R1 Router R1 # sh ip ospf database query the OSPF link status database OSPF Router with ID (1.1.1.1) (Process ID 100) The OSPF route ID describing R1 is 1.1.1.1, and the process ID is 100 Router Link States (Area 0) Region "0" in th

OSPF neighbor Table query on the R1 Router R1 # sh ip ospf neighbor command for querying OSPF neighbor table Neighbor ID Pri State Dead Time Address Interface 2.2.2.2 1 FULL/-00:00:35 199.99.1.2 Serial1/0 "Neighbor ID" indicates the route ID of the neighboring router, and the route ID is the unique identifier of the router in the

Why is loopback AS/32 host route advertised in OSPF?How do I change the reference bandwidth of OSPF? How does NBSP;OSPF calculate its measurement or cost? NBSP;OSPF is the routing protocol Exchange authenticated? What is the link state retransmission interval? What commands

IP address of an external route must be continuous. Route reduction is completed through the sub-commands under "router ospf", and this command is only valid on the VBR of the autonomous domain:Summary-address ip-address mask For example, router B injects an external route into the OSPF domain, and the injected subnet range is 126.1.96-127. To perform route redu

anti-ring: OSPF is a loop-free dynamic routing protocol. But only for internal and intra-OSPF areas. There is no good defense against the external routing loops introduced into OSPF, so when the OSPF External route is introduced, the routing is filtered to prevent the loops caused by manual configuration. Preve

may depend on the number of forwarding times between nodes, the current network running status, data transmission rate, and topology. To find the optimal path, Each router needs to communicate with each other through the routing protocol. The routing protocol is only used to collect data about the current status of the network and find the optimal transmission path. Based on the data, the router can create a route table for future packet forwarding. In addition to the ability to find the optim

How to locate the cause of the fault and correct troubleshooting, all need to be based on the understanding of the operation of the agreement.This article is about the idea and operation of OSPF troubleshooting.The command to use:Display IP routing-table//See route first, determine fault locationdisplay OSPF peer//based on neighbor relationships, further identify the point of failuredisplay

Configuration process on R1: 1. Allocate IP addresses to the Loopback 0 interface. 2. Assign IP3. to ethernet 0/0 to allocate IP addresses to interfaces S1/0 and encapsulate the PPP protocol.Www.2cto.com 4. Enable the OSPF routing protocol. The process number is 110 and the network segment is directly connected. 5. Configure area 51 as The NSSA region on R2: 1. assign an IP address to the Loopback 0 interface. 2. Assign IP3. enable the

Read a table before introduction! What is the relationship between the L2 link and the OSPF network type?In fact, the relationship between the two networks can be larger. The OSPF network type should be selected based on the type of the L2 link, and the two applications match, that is, when the OSPF network type supports multicast, if the L2 link does not suppor

the OSPF routing protocol converges, all routers calculate their route tables based on their respective link status information database. This routing table contains the router to eachA cost that can reach the destination and the next router (next-hop) to be forwarded to the destination ). The 4th step is actually a feature of the OSPF routing protocol. When the network status is stable, the link status in

”的可靠性和高效性。 [DBD报文中包含的是数据库中的条目的基本信息]4、exchange - 交换状态。在该阶段，主从路由器会进行 DBD 报文的 互相传输，最终实现两边数据库的比对工作。5、loading - 加载状态。在该状态下，主从路由器就会通过 LSR和LSU 进行 “数据库条目”的请求和发送，并通过 LSAck 报文 对该过程进行确认。6、full - 完全邻接。即此时邻居路由器之间的数据库完全一致。Basic configuration commands for OSFP:[R1]OSPF 1 Router-id 1.1.1.1"ID of the router"[R1-ospf-

Editor's note: In recent years, with the rapid development of computer network applications, new network products and network technologies have been further developed, which makes it possible to expand the computer network scale. OSPFOpen Shortest Path First) is a widely used routing protocol. It adopts an OSPF autonomous system. After reasonable planning, it can effectively expand the computer network scale. This section describes the principles and

To avoid inter-zone loops, OSPF does not allow routing information to be published directly between two non-backbone zones, allowing routing information to be published only within a region or between the backbone and non-backbone regions. Therefore, each zone boundary router (ABR) must be connected to the backbone area. Inter-zone routing via NETWORK-SUMMARY-LSA Declaration650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M01/70/65/wKiom1W3Glrj3

650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M01/89/CC/wKioL1gdRUfAQOUJAABrH4nJ2qU055.png-wh_500x0-wm_3 -wmp_4-s_651571346.png "title=" OSPF Networking topology Map "alt=" wkiol1gdrufaqoujaabrh4nj2qu055.png-wh_50 "/>OSPF Networking Basic configuration:1. Three-layer switchSwitch>enableSwitch#configure TerminalEnter configuration commands, one per line