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Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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

Introduction to Cisco Routers and Switches

Willis Kim

8 October 2005

Page 2: 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

Page 3: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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).

Page 4: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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

Page 5: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Building networks

Topology, interface and configuration diagrams are essential before starting

Know where you are going so you know when you get there!

Page 6: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Network diagram

VDSL via POTS

Seoulcc Wireless Router 802.11b/g

192.168.1.1 (gateway)

VDSL modemWireless Bridge 802.11b192.168.1.50 (mgt only)

Linksys Wireless Router 802.11b/g

192.168.1.2 (gateway)

Cisco 2611 routerWith DHCP

Catalyst 3500XL Switch VLAN1 192.168.200.5

192.168.100.2 Ethernet 0/0

`

DHCP, 192.168.200.x

192.168.200.1 Ethernet 0/1

192.168.100.1

Voice over IP phone192.168.15.1

Subnet 1.x

Subnet 100.x

Subnet200.x

Subnet 15.x

Page 7: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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)

Page 8: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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

Page 9: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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, Ethernet0/1C 192.168.100.0/24 is directly connected, Ethernet0/0S* 0.0.0.0/0 [1/0] via 192.168.100.1

Page 10: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Configuring the router (con’t) Global configuration

For example - Hostname, name-server, privilege password

Configuring interfacesinterface 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

Page 11: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Configuring the router (con’t)

Configuring DHCPip 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

Page 12: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Configuring the router (con’t)

Routing Static vs. Dynamic Stub network - staticip route 0.0.0.0 0.0.0.0 192.168.100.1ip route 192.168.200.0 255.255.255.0

192.168.200.2

Page 13: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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-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

Page 14: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Configuring the switch

VLAN1 is associate with all ports Assign an IP addressinterface VLAN1 ip address 192.168.200.2

255.255.255.0

Page 15: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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

Page 16: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

What is missing?

Testing connectivity ping from nearest to farthest traceroute

Page 17: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

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)

Page 18: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Questions

Page 19: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

7dBi Annenta

Page 20: Introduction to Cisco Routers and Switches Willis Kim 8 October 2005

Ximeta - Network Storage

Netdisk 250GB using NDAS For Local Area Network (Ethernet)