the ip routing protocols

... introduction of the 128-bit IPv6 addressing scheme This book covers practical troubleshooting of IP routing protocols deployed in IPv4 environments Therefore, the ensuing text discusses only the IPv4 addressing ... OSPF, and IS-IS The next section further discusses dynamic routing protocols Dynamic Routing The last section discusses the essence of IP routing and indicates that dynamic automatic routing is very ... to routing loops A routing loop occurs when two nodes point to each other as the next hop along the path to the same destination The most obvious effect of routing loops is that they prolong the...

Ngày tải lên: 16/10/2013, 12:15

... examine the interaction between the routing protocols and the routing table to understand how the routing table is built Building the Routing Table As each routing process receives updates and other ... succeeds on the next attempt The other solution is for the routing protocol that failed to install its route in the table to hang on to the route, and tell the routing table process to report if the ... TAC Tools for Routing Protocol Technologies Related Information • IP Routing Top Issues • More IP Routing Technical Tips • EIGRP Technical Tips • More Routing Protocols Technical Tips All contents...

Ngày tải lên: 13/11/2012, 11:22

... mạng B Chính routing table Router1 route đến mạng B (10.11.0.0/16) Để giải vấn đề này, dùng static routing dùng routing hỗ trợ VLSM Khi cần phải có routing protocol support VLSM ( RIP v2, OSPF ... debug ip rip Router để kiểm tra: RIP: sending v1 update to 255.255.255.255 via Serial0 (131.108.2.2) subnet 131.108.5.0, metric network 137.99.0.0, metric Nhận update: Dùng lệnh debug ip rip, thấy ... ý IP cùa source destination không thay đổi có mac thay đổi bạn xem ví dụ sau để đễ hiểu máy A -Router1 router2 router3 máy B máy A đóng gói gói tin sau IP nguồn IP máy A IP đích IP...

Ngày tải lên: 07/09/2013, 15:00

... authorization by the gatekeeper to admit the call ARJ—Denies the endpoint's request to gain access to the network for this particular call The ACF message contains the IP address of the terminating ... with the participating endpoint The reliable control channel is created over IP using the dynamically assigned TCP port in the final call signaling message The exchange of capabilities, the opening ... backward message sent from the called entity to the calling entity indicating that the called party answered the call The connect message can contain the transport UDP /IP address for H.245 control...

Ngày tải lên: 30/09/2013, 05:20

... shared Ethernet ip address _ ip directed-broadcast int s0 description serial link to parsley ip address _ int s1 description serial link to rosemary ip address _ router rip network ... _ ip directed-broadcast int s0 description serial link to rosemary ip address _ int s1 description serial link to sage ip address _ router rip network _ network _ ip ip ... _ ip host parsley ip host rosemary no service config _ _no ip domain-lookup Router Rosemary no ip subnet-zero hostname rosemary ! int e0 description shared Ethernet ip address...

Ngày tải lên: 05/11/2013, 12:15

... with a VoIP signaling protocol, and the ability to call anywhere needed, further relies on VoIP signaling protocols Another role of the signaling protocol is potentially to hand off the dialed ... of these protocols are based on IP, thus, requiring an existing IP infrastructure to operate Any error in IP or relating to IP, such as convergence issues with Spanning tree protocol or the routing ... by the ITU In the early 1990s, the ITU changed their name from the Consultive Committee on International Telephony and Telegraphy (CCITT [the full correct name is in French]) The origin of the...

Ngày tải lên: 10/12/2013, 14:15

... accepts the frame The router strips off the frame and discards it The IP packet that was inside the frame is passed to the router's IP stack for examination The IP protocol stack sees the destination ... reduces the likelihood of fragmentation The destination machine's IP protocols accept packets from the Ethernet protocols and strip off the packet structure to reveal the embedded data segments These ... packet structure Complete IP packets are then passed up the stack to the IP protocols for further processing Note As you will see in Part III, "Routing Protocols, " some routing protocols share information...

Ngày tải lên: 10/12/2013, 14:16

... 2001 IP Address #9 20 On the slide, IP Route Options” the format for the IP options that involve routing is displayed The code field defines the type of IP option that is being specified The ... must construct the whole IP routing list Each gateway along the way inspects the list If the pointer is greater than the length, then the list is exhausted and the gateway routes the packet to ... address to the destination address of the packet If they match, then the next address on the option list becomes the new destination and the ptr is incremented If the addresses not match, then the packet...

Ngày tải lên: 10/12/2013, 15:15

... 跳,它每 30 秒向外发送整个路由表的 信息.RIP 适合于小型网络.RIP 版本 1(RIPv1)使用分级路由(classful routing) ,意思是在网络的 所有设备必须使用相同的子网掩码;而 RIP 版本 2(RIPv2)使用无分类路由(classless routing) 我们这里讨论 RIPv1 RIP Timers RIP 使用 种不同的计时来调节它的性能: 1.路由更新计时(route ... 192.168.40.1/24 RouterB# show ip protocols: 显示 router 上配置好了的路由协议,如下: RouterB#sh ip protocols Routing Protocols is “rip” (略) debug ip rip:发送控制台消息显示有关在 router 接口上收发 RIP 数据包的信息,关闭 debug,使 用 undebug ... Configuring IP Routing in Our Network 当 个 router 收到 个目标网络号没有在路由表中列出的包的时候,它并不发送广播寻找目 标网络,而是直接丢弃它 几种不同类型的路由: 1.静态路由(static routing) 2.默认路由(default routing) 3.动态路由(dynamic routing) Static Routing 静态路由:手动填加路由线路到路由表中,优点是:...

Ngày tải lên: 10/12/2013, 16:15

Ngày tải lên: 21/12/2013, 19:15

... 222934-9 / Chapter 11 Configuring Advanced Routing Protocols The show ip protocols Command You can use the show ip protocols command to display the IP routing protocols that have been configured and ... show ip protocols ■ show ip route ■ show ip ospf interface ■ show ip ospf neighbor ■ debug ip ospf adj ■ debug ip ospf events ■ debug ip ospf packet The following sections cover these commands The ... to the DR and the BDR (with a destination multicast address of 224.0.0.6), telling them about this change Once the DR and the BDR incorporate the change internally, the DR then tells the other...

Ngày tải lên: 18/01/2014, 04:20

... 222934-9 / Chapter 11 Configuring Advanced Routing Protocols The show ip protocols Command You can use the show ip protocols command to display the IP routing protocols that have been configured and ... show ip protocols ■ show ip route ■ show ip ospf interface ■ show ip ospf neighbor ■ debug ip ospf adj ■ debug ip ospf events ■ debug ip ospf packet The following sections cover these commands The ... to the DR and the BDR (with a destination multicast address of 224.0.0.6), telling them about this change Once the DR and the BDR incorporate the change internally, the DR then tells the other...

Ngày tải lên: 18/01/2014, 04:20

... i What is the VIA address in the OSPF route? _ j Are routes to all networks shown in the routing table? k What does the O mean in the first column of the routing table? ... Rome#show ip route g Are there any OSPF entries in the routing table now? h What is the metric value of the OSPF route? _ 3-6 CCNA 3: Switching Basics and Intermediate Routing ... interfaces according to the chart Finally, configure the IP hostnames Do not configure the routing protocol until specifically told to If there are any problems configuring the router basics, refer...

Ngày tải lên: 18/01/2014, 04:20

... like static routing does, but the information is automatically provided through the use of routing protocols These routing protocols replace all the manual requirements of static routing, which ... Gateway Routing Protocol (EIGRP) Common Routing Protocols There are a number of common routing protocols that most environments use Routing Information Protocol RIP is a distance vector routing protocols ... it arrives at the destination network The smaller the hop count, the shorter and better the route Distance vector routing protocols receive routing information from neighbors that they believe...

Ngày tải lên: 26/01/2014, 04:20

... by the routing table to know whether or not the destination IP address of the packet is a match with the route in the routing table A classless routing protocol includes the subnet mask with the ... Although the network address is the same; one is a subnet of the other The subnet mask is required in the routing update to determine the network portion of the address The network portion of the ... Addressing  Classful IP Addressing  Classful Routing Protocols  Classless IP Addressing  Classless Routing Protocols Classful and Classless Routing Protocols  Routing protocols:  classful...

Ngày tải lên: 23/02/2014, 09:20

... when there is a change in the topology  Only the information regarding the affected link  Unlike some distance vector routing protocols (RIP), link-state routing protocols not send periodic ... then flood the LSPs to their neighbors until all routers in the area have received the LSPs Each router uses the database to construct a complete map of the topology and computes the best path ... with an IP address/subnet mask Directly connected networks are now part of the routing table Regardless of the routing protocols used 12 Step  A link is an interface on a router  For the link...

Ngày tải lên: 23/02/2014, 09:20

... performed by another routing process that uses global IP routing table, the P-router 37 Layer MPLS VPNs  In a Layer MPLS VPN, the following requirements must be met:  The customer routers (the CE-routers) ... 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 backbone ... 100 DLCI 130  Inverse ARP is on by default  Automatically maps the IP address of the devices at the other end of the PVCs to the local DLCI number  Split horizon is disabled by default on Frame...

Ngày tải lên: 05/03/2014, 17:20

... network command  Other powerful OSPF troubleshooting commands include the following:  show ip protocols  show ip ospf  show ip ospf interface 43 Verifying OSPF R1# show ip protocols Routing Protocol ... derived from the interface with the highest active IP address  The router ID can be modified with the IP address from a subsequent OSPF router-id command by reloading the router or by using the following ... criteria and with the following precedence: Use the IP address configured with the OSPF router-id command If the router ID is not configured, the router chooses the highest IP address of any...

Ngày tải lên: 09/03/2014, 13:20

... ip routing IP routing debugging is off R2# 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 ... static route Ÿ dynamic route l Disable debug ip routing by either: Ÿ undebug ip routing Ÿ undebug all 37 Changing an IP Address R2# debug ip routing IP routing debugging is on R2# config t Enter configuration ... entered in the routing table; the host route represents an individual host IP address l The host route is listed with the device’s host IP address and a /32 (255.255.255.255) subnet mask l The topic...

Ngày tải lên: 09/03/2014, 13:20

... maintaining the router’s routing table The algorithm used for the routing protocols defines the following processes: Mechanism for sending and receiving routing information Mechanism for calculating the ... Serial 0/0/0 There is no change; therefore, the routing information remains the same Receives an update from R3 about network 10.4.0.0 on Serial 0/0/1 There is no change; therefore, the routing information ... information in the routing table RIPv1 and RIPv2 IGRP Sent even when there is no new information The term periodic updates refers to the fact that a router sends the complete routing table to...

Ngày tải lên: 09/03/2014, 13:20