ospf training

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

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

.Network 192.1.0.128 0.0.0.63 area 1! Router2: interface ethernet 0ip address 192.1.0.65 255.255.255.192! Interface serial 0ip address 192.200.10.6 255.255.255.252! Router ospf 200 network 192.200.10.4 0.0.0.3 area 0 network 192.1.0.64 0.0.0.63 area 2! Router3: interface ethernet 0ip address 192.1.0.130 255.255.255.255.192! Router ospf 300 network 192.1.0.128 0.0.63 area 1! Router4: interface ethernet 0ip a

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

"alt=" wkiol1w4xgchtgnfaactuvjwc58988.jpg "/>Here's the RTC Grab bag650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/70/72/wKioL1W4Xp3AZNv1AAD0aC8eY2M406.jpg "title=" 1.jpg " alt= "Wkiol1w4xp3aznv1aad0ac8ey2m406.jpg"/>Note: The Link state ID is set to the destination network segment address.Advertising router is set to the router ID of ASBR.Two Asbr-summary-lsaUsed to describe how to reach asbr from an ABR. generated by ABR (RTB)The following is the ASBR-SUMMARY-LSA generated by RTB65

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

vector routing protocol, the OSPF Routing Protocol has the advantage of fast convergence and wider applicability. In a large network topology, if each vro transmits and updates the route information of the entire network, it will seriously occupy bandwidth resources, when audio and video-based data is transmitted, such as the IT Training Center of Rongxin foreign company, the audio and video transmission i

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

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

R1 (config) # router ospf 10 R1 (config-router) # net 192.168.12.0 0.0.255 a 0 R1 (config-router )# * Dec 6 05:51:32. 975: OSPF: Interface Ethernet0/0 going Up * Dec 6 05:51:32. 975: OSPF: Send hello to 224.0.0.5 area 0 on Ethernet0/0 from 192.168.12.1 * Dec 6 05:51:33. 475: OSPF: Build router LSA for area 0, router ID

Use zebra for OSPF experimentsKeyword: ZebraOSPF (Open Shortest Path First) routing protocol is a link-state technology. It is the most widely used and optimal performance protocol in IGP, it solves the large and scalable network requirements that rip cannot solve, and is suitable for large-scale networks. Zebra supports ospfv2 and ospfv3 (OSPF for IPv6, Cisco has not encapsulated it). Due to restrictions,

R1 Configuration: Interface Loopback1 Ip address 1.1.1.1 255.255.255.0 ! Interface Loopback2 Ip address 1.1.2.1 255.255.255.0 ! Interface Loopback3 Ip address 1.1.3.1 255.255.255.0 ! Interface Serial1/1 Ip address 10.0.1.1 255.255.255.0 Serial restart-delay 0 ! Router ospf 1 Log-adjacency-changes Network 1.1.1.0 0.0.255 area 1 Network 1.1.2.0 0.0.255 area 1 Network 1.1.3.0 0.0.255 area 1 Network 10.0.1.0 0.0.0.255 area 1 ! R2 Configuration: Interface

OSPF is a complex routing protocol with many enhanced performance and stability features. Therefore, OSPF uses a large amount of data structures. Each data structure or information type is used to execute a specific task. All data structures share a common header, which is called an OSPF header. The OSPF header is 24 b

First, OSPF ProcessID locally validfirst, make it clear that the OSPF ProcessID, with a range of 1-65535, is used to identify the OSPF process locally on the router. Look, R1 uses process Number 10 to create an OSPF process while declaring its own straight connector, while R2 uses process number 20 to create an

Redistributing RIP, OSPF, and VPN in the NetworkTutorial steps: the frame relay link of R1/R2/R5 participates in the s2/1 link of ospf area 0R5/R6, participates in the l0 interface of ospf 100R2, participates in the frame relay link of area 20R2/R4, and participates in area 4R1/R3. frame relay link running rip v2, redundant interfaces are not allowed to send rip

OSPF Router ProtocolIGP protocol Link Status Protocol OSPF region structure problems in large OSPF networks the Shortest Path priority (SPF) algorithm frequently computes the route table large link status database (LSDB) the computing frequency of OSPFSPF after a large division is lower. The route table is smaller, which reduces the link state Update (LSU) overhe

The link status update (LSU) packet is used for OSPF route update. An LSU packet may contain 11 types of link status notifications (LSA). The difference between the terms "link status update (LSU)" and "link status notification (LSA)" is sometimes difficult to distinguish. Sometimes they can be used interchangeably. One LSU contains one or more LSAs. either of these two terms can be used to indicate the link status information transmitted by the