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Introduction to Cisco Routers and Switches

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).

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Introduction to Cisco Routers and Switches

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  1. Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

  2. Terminology Routers make decision on the flow of network traffic Switch – joins multiple devices from the same network

  3. Terminology (con’t) • 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).

  4. IP Addressing Class A = 1-126 * . H . H . H Class B = 128-191 . N . H . H Class C = 192-223 . N . N . H Subnet * 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.

  5. Building networks • Topology, interface and configuration diagrams are essential before starting • Know where you are going so you know when you get there!

  6. Network diagram Subnet 1.x Subnet 15.x Subnet 200.x Subnet 100.x

  7. Configuring the router (Command-line) • Use HyperTerminal Private Edition • Settings 9600, 8-N-1, hardware • Initial configuration using serial terminal and 180° cisco cable into console port • Unprivileged and privileged modes • Router> to Router# (all configurations)

  8. Configuring the router (con’t) • Router#show interfaces Ethernet0/0 is up, line protocol is up Hardware is AmdP2, address is 0050.3ee4.1100 (bia 0050.3ee4.1100) Internet address is 192.168.100.2/24 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

  9. Configuring the router (con’t) • Router#show ip route Codes: 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 192.168.100.1 to network 0.0.0.0 C 192.168.200.0/24 is directly connected, Ethernet0/1 C 192.168.100.0/24 is directly connected, Ethernet0/0 S* 0.0.0.0/0 [1/0] via 192.168.100.1

  10. Configuring the router (con’t) • Global configuration • For example - Hostname, name-server, privilege password • Configuring interfaces interface Ethernet0/0 ip address 192.168.100.2 255.255.255.0 half-duplex ! interface Ethernet0/1 ip address 192.168.200.1 255.255.255.0 half-duplex

  11. Configuring the router (con’t) • Configuring DHCP ip dhcp excluded-address 192.168.200.1 192.168.200.100 ! ip dhcp pool demonstration network 192.168.200.0 255.255.255.0 dns-server 168.126.63.1 168.126.63.2 default-router 192.168.200.1

  12. Configuring the router (con’t) • Routing • Static vs. Dynamic • Stub network - static ip route 0.0.0.0 0.0.0.0 192.168.100.1 ip route 192.168.200.0 255.255.255.0 192.168.200.2

  13. Configuring the router (con’t) • Saving your configuration ExampleName#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-config Now 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

  14. Configuring the switch • VLAN1 is associate with all ports • Assign an IP address interface VLAN1 ip address 192.168.200.2 255.255.255.0

  15. Internet IP - 192.168.1.2 Gateway – 192.168.1.1 Local IP - 192.168.100.1 Gateway – 192.168.1.2 Configuring the Linksys router

  16. What is missing? • Testing connectivity • ping from nearest to farthest • traceroute

  17. 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)

  18. Questions

  19. 7dBi Annenta

  20. Ximeta - Network Storage • Netdisk 250GB using NDAS • For Local Area Network (Ethernet)

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