Route wan

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  • Không thể route giữa các mạng WAN thông qua chuyển mạch gói (switched circuits) hoặc đường điện thoại (dialup lines). Khả năng route này chỉ thực hiện được khi có WAN card (ví dụ T1 hay FrameRelay

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  • Tham khảo tài liệu 'lab 5.2.3b building a basic routed wan', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf8p thanhha 27-08-2009 73 7   Download

  • 1.Connect devices that are separated by a broader geographical area. 2.Use the services of carriers, such as telephone companies, network providers… 3.Use serial connections.A VPN is an encrypted connection between private networks over a public network such as the Internet. Instead of using a dedicated Layer 2 connection such as a leased line, a VPN uses virtual connections called VPN tunnels, which are routed through the Internet from the private network of the company to the remote site or employee host.

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  • This lab focuses on the ability to connect two simple LANs, each consisting of a workstation and a switch or hub, to form a basic router-to-router WAN. A router is a networking device that can be used to interconnect LANs which routes packets between different networks using Layer 3 IP addressing. Routers are typically used to connect the Internet. In addition to the physical and data link connections, which are layers 1 and 2, the computers and routers must also be configured with the correct IP network settings, which is Layer 3, so that they can communicate.

    pdf7p thanhha 27-08-2009 86 13   Download

  • Link-State Routing Process 1. Each router learns about its own links, its own directly connected networks. (Interface is “up”) 2. Each router is responsible for meeting its neighbors on directly connected networks. (OSPF Hello packets) 3. Each router builds a link-state packet (LSP) containing the state of each directly connected link. (neighbor ID, link type, and bandwidth) 4. Each router floods the LSP to all neighbors, who then store all LSPs received in a database. Neighbors then flood the LSPs to their neighbors until all routers in the area have received the LSPs. 5.

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  • Enhanced 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 (IGRP).  Both are Cisco proprietary.  Operate only on Cisco routers.The term hybrid routing protocol is sometimes used to define EIGRP.  Misleading, not a hybrid between distance vector and link-state  Solely a distance vector routing protocol.

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  • There are advantages and disadvantages to using any type of routing protocol.  Some of their inherent pitfalls, and.  Remedies to these pitfalls.  Understanding the operation of distance vector routing is critical to enabling, verifying, and troubleshooting these protocols.RIP: Routing Information Protocol originally specified in RFC 1058.  Metric: Hop count  Hop count greater than 15 means network is unreachable.  Routing updates: Broadcast/multicast every 30 seconds

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  • The first protocol used was Routing Information Protocol (RIP).  RIP still popular: simple and widespread support.  Why learn RIP?  Still in use today.  Help understand fundamental concepts and comparisons of protocols  such as classful (RIPv1) and classless (RIPv2).RIP is not a protocol “on the way out.”  In fact, an IPv6 form of RIP called RIPng (next generation) is now available.

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  • Note on Classful Routing Protocols, RIPv1 limitations  The first part of this presentation discusses the limitations of classful routing protocols such as RIPv1.  RIPv1 is used as an example, so we can see how RIPv2 a classless routing protocol does not have these same limitations.  Classful routing protocols have three major limitations:  Does not support discontiguous networks.  Does not support VLSM.  Does not support CIDR.  Instead of just “memorizing” these facts, we will demonstrate and “understand” why a classful routing protocol has these limitati...

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  • The structure of the routing table might seem obvious.  Help you verify and troubleshoot routing issues because you will understand the routing table lookup process.  You will know exactly what the Cisco IOS software does when it searches for a route.Notice that R3 also has a subnet that is disconnected, or discontiguous, from the network that R1 and R2 share.  The effects of this discontiguous subnet are examined later in this chapter when you look at the route lookup process....

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  • Dynamic routing protocols have evolved over several years  As networks have evolved and become more complex, new routing protocols have emerged.  Most institutions have migrated to new protocols, others are still in use.  The first version of RIP was released in 1982, but some of the basic algorithms within the protocol were used on the ARPANET as early as 1969.

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  • RouterB(config)#interfaces 1RouterB(config-if)#ipadd %LINK-3-UPDOWN: Interface Serial1, changed state to up00:59:48: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed stateto up00:59:48: RT: add via, connected metric [0/0]00:59:48: RT: interface Serial1 added to routing tableRouterB(config-if)#endRouterB#undebugallAll possible debugging has been turned offRouterB#

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  • In this chapter, you will learn to: Describe the basic operation of EIGRP, plan and implement EIGRP routing, configure and verify EIGRP routing, configure and verify basic EIGRP in an enterprise WAN, configure and verify EIGRP authentication, describe and configure EIGRP optimization mechanisms; verify and troubleshoot the overall implementation.

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  • In this chapter, you learned to: Describe OSPF terminology and operation within various enterprise environments, describe the function and operation of packets in OSPF routing, configure and verify basic OSPF, describe and configure OSPF in various WAN network types,...

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  • This design guide defines the comprehensive functional components required to build a site-to-site virtual private network (VPN) system in the context of enterprise wide area network (WAN) connectivity. This design guide covers the design topology of point-to-point (p2p) Generic Route Encapsulation (GRE) over IP Security (IPsec). This design guide is part of an ongoing series that addresses VPN solutions, using the latest VPN technologies from Cisco, and based on practical design principles that have been tested to scale....

    pdf106p duypha 11-08-2009 261 60   Download

  • Your corporate network equipment currently includes a 4006 Core switch with an L3 module for VLAN routing and a Cisco 2600 external access router. Connected to your corporate network via a 128k leased line is your branch network that includes a 2600 Cisco WAN router and a 2600XL switch for local access. Your corporate network is segmented into four functional VLANs for better network management. VLANs include “Accounting”, “Marketing” and “Engineering” for the users and “default” used for the native VLAN network management.

    pdf1p thutrang 28-08-2009 162 49   Download

  • Network loads and management issues require you to segment your network from a single broadcast domain into four functional areas. You select to implement VLANs throughout your Cisco 2900-switched network and will refer to them as “Accounting”, “Marketing” and “Engineering” for the users, and “default” used for the native VLAN network management. After deciding on your subnet ranges and VTP information, illustrated below, your next step is to implement Inter-VLAN routing using your Cisco 2600 series router.

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  • Describe the basic purpose of a router – Computers that specialize in sending packets over the data network – They are responsible for interconnecting networks by selecting the best path for a packet to travel and forwarding packets to their destination Routers are the network center – Routers generally have 2 connections: • WAN connection (Connection to ISP) • LAN connection

    ppt408p phutran76 03-05-2012 102 39   Download

  • Your network switching equipment currently includes a 4006 Core switch, 2900XL access switch and a Cisco 2600 series external access router. Your network is segmented into four functional VLANs for better network management. VLANs include “Accounting”, “Marketing” and “Engineering” for the users and “default” used for the native VLAN network management. Inter- VLAN routing has been implemented using a Layer-3 routing switch module for the 4006 to allow individuals and servers on your Virtual LANs to exchange information.

    pdf1p thutrang 28-08-2009 151 35   Download

  • As internetworks grew in scale and diversity in the early 1990s, new routing protocols were needed. Cisco developed Enhanced Interior Gateway Routing Protocol (IGRP) primarily to address many of the limitations of IGRP and RIP. As WANs were growing, so was the need for a routing protocol that would use efficient address space on WAN links, as well as the LAN networks. OSPF was available, but the CPU-intensive tasks that it had to perform often overloaded the small processors of many edge or remote routers of that time. The configuration was also more complex than that of RIP or IGRP.

    pdf1p thutrang 28-08-2009 132 25   Download


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