BASICS OF IP ROUTING

router 转发 IP 包时,只根据 IP 包目的 IP 地址的网络号部分,选择合适的接口,把 IP 包送出去.同主机一样,router 也要判定接口所接的是否是目的子网,如果是,就直接把包通过接口送到网络上,否则,也要选择下一个 router 来传送包.router 也有它的缺省网关,用来传送不知道往哪儿送的 IP 包.[r]

no service configRouter Rosemaryno ip subnet-zerohostname rosemary!int e0description shared Ethernetip address _____________ip directed-broadcastint s0description serial link to rosemaryip address _____________int s1description serial link to sageip address _____________router ripnetwo[r]

IP Routing I have alluded to routing repeatedly in this chapter but have not really explained the routing process in detail and why it is important to us. Routing is nothing more than taking the data from a host and transmitting it across the network to a host on a[r]

included in the network design so that routers can automatically update routing information for unicast packets. • Explain that Internet Group Management Protocol (IGMP) is added to the routing design so that the router can pass IGMP Membership Report packets from a single-router priva[r]

Lab 2 IP Routing Configuration (30 minutes) The objective of this lab is to configure OSPF/IGRP/EIGRP/BGP in different parts of the network and to redistribute routing information. In the working setup all routers should see every route and should be able to ping[r]

NOTE: You will only be configuring the Headquarters router. Assume all other routers have been configured. Because the MainOffice, RemoteOffice and SalesOffice routers are not physically present, the Headquarters router will not show any connectivity to these routers and their networks. Use good tim[r]

considered as well. Additional factors:– Expandability– Media – Operating System FeaturesExpandabilityBasic Network Media Required to Make a LAN ConnectionHọc viện mạng Bách khoa - Website: www.bkacad.comExpandability• Fixed configurations • Modular devices• Most modular devices come with a basic nu[r]

Summary............................................................................................................................................................11 NetPro Discussion Forums − Featured Conversations.....................................................................................[r]

address. This feature is enabled by default. If it has been disabled, see the section “Enable ProxyARP” earlier in this chapter.Proxy ARP works as long as other routers support it. Many other routers, especially those loadedwith host-based routing software, do not support it.Default GatewayAn[r]

Device ID Local Interface Holdtime Capability Platform Port IDrouterB Eth 0 151 R 2501 Eth 0routerB Ser 0 165 R 2501 Ser 0Example 18-8 show cdp neighbors detail CommandrouterA# show cdp neighbors detailDevice ID: routerBEntry address(es): IP address: 198.92.68.18Platform: 2501, Capabilities:[r]

ipx sap service-type name network.node IPX-socket hop-count Dùng trong static route nhằm xác đònh loại dòch vụ, (4=file service, name là tên Server của mạng đích, network.node là IPX address của Server, IPX-socket là IPX-socket number, hop-count là số hop đến serverce. 2000 ở đây là internal IPX net[r]

Summary............................................................................................................................................................11 NetPro Discussion Forums − Featured Conversations.....................................................................................[r]

RIP works well in small environments but has serious limitations when used in larger internetworks. Forexample, RIP limits the number of router hops between any two hosts in an internet to 16. RIP is also slow toconverge, meaning that it takes a relatively long time for network changes to bec[r]

eRouters icon and choose 2500. Use the show ip protocols command tomake sure that RIP is configured—check for the neighboring router’s IP address.Use the show ip route command and look for the remote LAN networknumber as a RIP (R) entry in the routing table. On the 2500,[r]

eRouters icon and choose 2500. Use the show ip protocols command tomake sure that RIP is configured—check for the neighboring router’s IP address.Use the show ip route command and look for the remote LAN networknumber as a RIP (R) entry in the routing table. On the 2500,[r]

only the routers with LANs needing Internet access17.Refer to the exhibit. Router1 is running RIPv1. What command was entered into Router1 to configure the gateway of last resort?no auto-summaryip default-network 0.0.0.0ip default-gateway 10.0.0.0ip route 0.0.0.0 0.0.0.0 S0/0/11[r]

forwards IP packets out of the MPLS domainMPLS DomainEdge LSRLSR10.1.1.1 L=3 L=5L=43L=3120.1.1.110.1.1.120.1.1.1 Before proceeding with a detailed description of MPLS, some of the terminology that is used in this course is presented: n Label Switch Router (LSR): a device[r]

interfaces.IP Routing Configuration Tasks© 2002, Cisco Systems, Inc. All rights reserved. ICND v2.0—5-6•Defines an IP routing protocolRouter(config)#router protocol [keyword] •Mandatory configuration command for each IP routing process•Identifies the physica[r]

distance vectors with more accurate metrics to determine the best paths to destination networks. However, they differ from most distance vector protocols by using topology changes to trigger routing database updates instead of periodic updates.Like link-state protocols, the balanced hy[r]

RIP Features 739The router sends update information out the two RIP interfaces. The output shows the router is using RIP-1 and broadcasts the update (address 255.255.255.255). The num-ber in parentheses represents the source address encapsulated into the IP header of the RIP update.You[r]