Introduction to Cisco Routers and Switches

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Introduction to Cisco Routers and Switches. Willis Kim 8 October 2005. Terminology. Routers make decision on the flow of network traffic Switch – joins multiple devices from the same network. Terminology (con’t). - PowerPoint PPT Presentation

Text of Introduction to Cisco Routers and Switches

  • Introduction to Cisco Routers and SwitchesWillis Kim

    8 October 2005

  • TerminologyRouters make decision on the flow of network traffic Switch joins multiple devices from the same network

  • Terminology (cont)An IP address is the logical address of a network adapter. The IP address uniquely identifies computers on a network. An IP address can be private, for use on a LAN, or public, for use on the Internet or other WAN. IP addresses can be determined statically (assigned to a computer by a system administrator) or dynamically (assigned by another device on the network on demand).

  • IP AddressingClass A = 1-126 * . H . H . HClass B = 128-191 . N . H . HClass C = 192-223 . N . N . H* IP addresses beginning with 0 and 127 are reserved. IP Addresses in the range of 10.H.H.H, 172.16-31.H.H, and 192.168.x.H are reserved for private use and are not assigned.Subnet

  • Building networksTopology, interface and configuration diagrams are essential before startingKnow where you are going so you know when you get there!

  • Network diagramSubnet 1.x

    Subnet 100.xSubnet200.xSubnet 15.x



    VDSL via POTS

  • Configuring the router (Command-line)Use HyperTerminal Private EditionSettings 9600, 8-N-1, hardwareInitial configuration using serial terminal and 180 cisco cable into console portUnprivileged and privileged modesRouter> to Router# (all configurations)

  • Configuring the router (cont)Router#show interfacesEthernet0/0 is up, line protocol is up Hardware is AmdP2, address is 0050.3ee4.1100 (bia 0050.3ee4.1100) Internet address is MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set . 5 minute input rate 0 bits/sec, 0 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 27399 packets input, 6250892 bytes, 0 no buffer Received 2650 broadcasts, 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 input packets with dribble condition detected 30322 packets output, 5415946 bytes, 0 underruns 102 output errors, 25 collisions, 3 interface resets 0 babbles, 0 late collision, 195 deferred 102 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out

  • Configuring the router (cont)Router#show ip routeCodes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route

    Gateway of last resort is to network

    C is directly connected, Ethernet0/1C is directly connected, Ethernet0/0S* [1/0] via

  • Configuring the router (cont)Global configurationFor example - Hostname, name-server, privilege passwordConfiguring interfacesinterface Ethernet0/0 ip address half-duplex!interface Ethernet0/1 ip address half-duplex

  • Configuring the router (cont)Configuring DHCPip dhcp excluded-address!ip dhcp pool demonstration network dns-server default-router

  • Configuring the router (cont)RoutingStatic vs. DynamicStub network - staticip route route

  • Configuring the router (cont)Saving your configurationExampleName#show running-config You do want to save your successful running configuration. Issue the command copy running-config startup-config.ExampleName#copy running-config startup-config Your configuration is now saved to non-volatile RAM (NVRAM). Issue the command show startup-config.ExampleName#show startup-configNow any time you need to return your router to that configuration, issue the command copy startup-config running-config.ExampleName#copy startup-config running-config

  • Configuring the switchVLAN1 is associate with all portsAssign an IP addressinterface VLAN1 ip address

  • Configuring the Linksys routerInternet IP -

    Local IP -

  • What is missing?Testing connectivity ping from nearest to farthesttraceroute

  • What is missing?Static routes back from the Linksys router (200.x and 15.x)Static routes back from the Seoulcc router (200.x, 100.x and 15.x)

  • Questions

  • 7dBi Annenta

  • Ximeta - Network StorageNetdisk 250GB using NDASFor Local Area Network (Ethernet)