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 * 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

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 100.x Subnet 200.x Subnet 15.x

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

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)