linkstate routing protocols advantages

... trong routing table của Router1 sẽ không có route nào đến mạng B (10.11.0.0/16). Để giải quyết vấn đề này, dùng static routing hoặc dùng các routing hỗ trợ VLSM. Khi này thì cần phải có các routing ... cùng một subnet mask duy nhất. Vì khi các routing protocol nhận các routing update về các net khác (các network không kết nối trực tiếp), thì các classfull routing protocol sẽ lấy giá trị subnet ... trao đổi các topology bên cạnh với nhau update vào routing table, tính giải thuật đường đi lớn nhất và chiếm nhiều bộ nhớ (link state routing protocols OSPF, NLSP, IS-IS). A, khi Host...

Ngày tải lên: 07/09/2013, 15:00

... the characteristics and classification of various IP routing protocols. Although all routing protocols have a common goal of gathering routing information to support packet-forwarding decisions, ... "Understanding IP Routing& quot;— This chapter provides an overview of IP routing protocols with focus on the following topics: - IP addressing concepts - Static and dynamic routes - Dynamic routing - Routing ... distance vector protocols and link-state protocols. Distance Vector Routing Concepts This section reviews key concepts that underlie the operation of distance vector routing protocols, such...

Ngày tải lên: 16/10/2013, 12:15

... back: ■ Update Contains a routing update ■ Query Asks a neighboring router to validate routing information ■ Reply Responds to a query message 26 Chapter 11: Configuring Advanced Routing Protocols CertPrs8 ... packet The following sections cover these commands. The show ip protocols Command The show ip protocols command displays all of the IP routing protocols that you have configured and are running on your ... troubleshoot. Knowing the advantages and disadvantages of any routing protocol is useful when it comes to picking a protocol. Typically, OSPF is used in large enterprise networks that have either a mixed routing...

Ngày tải lên: 18/01/2014, 04:20

... printer profile Composite Default screen The show ip protocols Command You can use the show ip protocols command to display the IP routing protocols that have been configured and are running on ... packet The following sections cover these commands. The show ip protocols Command The show ip protocols command displays all of the IP routing protocols that you have configured and are running on your ... introduced to the configuration of two distance vector routing protocols: IP RIP and IGRP. This chapter focuses on two advanced routing protocols: OSPF and EIGRP. OSPF is a link state protocol,...

Ngày tải lên: 18/01/2014, 04:20

... Addresses Chapter 6 VLSM and CIDR Routing Protocols and Concepts 17 Classless Routing Protocol  Classless routing protocols include the subnet mask with the network address in their routing updates. 44 Route ... and 172.30.3.0/24) as 172.30.0.0.  R3 applies the /8 mask (classful routing protocol) 8 Classful Routing Protocol  Routing protocols, such as RIPv1, only needed to propagate the network address, ... with the route in the routing table. A classless routing protocol includes the subnet mask with the network address in the routing update. 40 CIDR  Classless interdomain routing (CIDR) is a...

Ngày tải lên: 23/02/2014, 09:20

... link. Implementing Link-State Routing  Advantages of a Link-State Routing Protocol  Requirements of a Link-State Routing Protocol  Comparison of Link-State Routing Protocol Note: Chapter ... link-state routing process, it must be: In the up state. Included in one of the network statements. 43 Advantages of a Link-State Routing Protocol  Builds a Topological Map Distance vector routing protocols ... link- state routing protocol, OSPF. 46 Hierarchical Design  Link-state routing protocols such as OSPF and IS-IS use the concept of areas. Better route aggregation (summarization) Isolation of routing...

Ngày tải lên: 23/02/2014, 09:20

... circuits  Advantages  IP routing provides dynamic, automatic path setup  Provides best path and backup paths  Provides QoS  Disadvantages  Latency in hop-by-hop Layer 3 lookup  Latency in routing ... assigned an independent routing table - the virtual routing and forwarding (VRF) table in the PE router.  PE routers maintain separate routing tables for each customer.  Routing across the provider ... interface-number  Defines a neighboring router to exchange EIGRP routing information.  Instead of using multicast packets, EIGRP exchanges routing information with the specified neighbor using unicast...

Ngày tải lên: 05/03/2014, 17:20

... network command  OSPF Router ID  Verifying OSPF  Examining the Routing Table 44 Verifying OSPF R1# show ip protocols Routing Protocol is “ospf 1” Outgoing update filter list for all interfaces ... nssa Maximum path: 4 Routing for Networks: 172.16.1.16 0.0.0.15 area 0 192.168.10.0 0.0.0.3 area 0 192.168.10.4 0.0.0.3 area 0 Reference bandwidth unit is 100 mbps Routing Information Sources: ... used for OSPF routing updates.  Can contain 11 different types of LSAs (Link-State Advertisements) (CCNP)  At times, these terms are used interchangeably. 50 Examining the Routing Table R2#...

Ngày tải lên: 09/03/2014, 13:20

... Added to the Routing Table l The debug ip routing displays routing table processes for any route, Ÿ directly connected network Ÿ static route Ÿ dynamic route. l Disable debug ip routing by either: Ÿ ... debug ip routing by either: Ÿ undebug ip routing Ÿ undebug all R2# undebug all All possible debugging has been turned off ! or ! R2# undebug ip routing IP routing debugging is off R2# 1818 Unsolicited ... to display the routing table. l Initially, the routing table is empty if no interfaces have been configured. l Note: Static routes and dynamic routes cannot be added to the routing table until...

Ngày tải lên: 09/03/2014, 13:20

... receivesreceives 33 Routing Table Maintenance  Routing protocols must maintain the routing tables so that they have the most current routing information.  How?  Depends on:  Type of routing protocol ... 10.3.0.0 in the routing table with a metric of 1 sends receives 4 Introduction to Distance Vector Routing Protocols  There are advantages and disadvantages to using any type of routing protocol.  ... Distance Vector Routing Protocols  Distance Vector Technology  Routing Protocol Algorithms  Routing Protocol Characteristics  Network Discovery  Cold Start  Initial Exchange of Routing Information ...

Ngày tải lên: 09/03/2014, 13:20

... Provides access to configure routing protocol settings.  No routing updates are sent until additional commands are configured.  no router rip  To remove the RIP routing process from a device  ... Routers and Automatic Summarization  Processing RIP Updates  Sending RIP Updates  Advantages and Disadvantages of Automatic Summarization  Default Route and RIPv1  Modified Topology C  ... Boundary Routers and Automatic Summarization  Processing RIP Updates  Sending RIP Updates  Advantages and Disadvantages of Automatic Summarization 41  Some routers can have interfaces that do not...

Ngày tải lên: 09/03/2014, 13:20

... an IP address.  Specific purposes with some routing protocols such as OSPF (later)  A loopback interface can be:  pinged  subnet advertised in routing updates.  Ideal for simulating multiple ... Use of hold-down and other timers to help prevent routing loops  Use of split horizon and split horizon with poison reverse to also help prevent routing loops  Use of triggered updates when there ... Null0 21 Examining the Routing Tables  R2 has two equal-cost routes to the 172.30.0.0/16 network.  R1 and R3 are sending R2 a RIPv1 update for the 172.30.0.0 network with a metric of 1 hop.  R2’s routing...

Ngày tải lên: 09/03/2014, 13:20

... parent route 9 Sample Routing Table Entries  The routing table hierarchy in Cisco IOS software was originally implemented with the classful routing scheme.  Although the routing table incorporates ... the routing table, the router drops the packet. The Route Lookup Process Routing Table 35 Step 1b.  If the best match is a level 1 parent route, proceed to Step 2 The Route Lookup Process Routing ... route in the routing table, a minimum number of leftmost bits must match between the IP address of the packet and the route in the routing table.  The subnet mask of the route in the routing table...

Ngày tải lên: 18/03/2014, 14:20

... Garcia-Luna- Aceves.  Routing loops, even temporary ones, can be extremely detrimental to network performance.  Distance vector routing protocols such as RIP prevent routing loops with hold-down ... Interior Gateway Routing Protocol (EIGRP)  Distance vector  Classless routing protocol  Released in 1992 with Cisco IOS Software Release 9.21.  Enhancement of Cisco Interior Gateway Routing Protocol ... by EIGRP.  The MTU is included in the routing updates, but it is not used to determine the routing metric. 6 Introduction to EIGRP  The term hybrid routing protocol is sometimes used to define...

Ngày tải lên: 18/03/2014, 14:20

... Table R1’s Routing Table R3’s Routing Table 23 Classful Routing Protocols  Classful routing protocols do not send subnet mask information in routing updates.  The first routing protocols, ... address. 16 Distance Vector and Link-State Routing Protocols  Interior gateway protocols (IGP) can be classified as two types:  Distance vector routing protocols  Link-state routing protocols  They work in ... system  Exterior gateway protocols (EGP):  Used for inter-autonomous system routing  Routing between autonomous systems 43 Verifying AD: show ip protocols R2# show ip protocols Routing Protocol is...

Ngày tải lên: 18/03/2014, 14:20

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Ngày tải lên: 05/07/2014, 03:20