introduction to cisco routers and switches willis kim 8 october 2005
TRANSCRIPT
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Introduction to Cisco Routers and Switches
Willis Kim
8 October 2005
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Terminology
Routers make decision on the flow of network traffic
Switch – joins multiple devices from the same network
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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).
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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
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Building networks
Topology, interface and configuration diagrams are essential before starting
Know where you are going so you know when you get there!
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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
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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)
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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
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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
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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
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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
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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
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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
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Configuring the switch
VLAN1 is associate with all ports Assign an IP addressinterface VLAN1 ip address 192.168.200.2
255.255.255.0
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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
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What is missing?
Testing connectivity ping from nearest to farthest traceroute
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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)
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Questions
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7dBi Annenta
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Ximeta - Network Storage
Netdisk 250GB using NDAS For Local Area Network (Ethernet)