Transcript VoIP and Desktop Video Teleconferencing

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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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 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.
Building networks
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Topology, interface and configuration
diagrams are essential before starting
Know where you are going so you know
when you get there!
Network diagram
VDSL via POTS
Wireless Bridge 802.11b
192.168.1.50 (mgt only)
Seoulcc Wireless Router
VDSL modem
802.11b/g
192.168.1.1 (gateway)
Subnet 15.x
Subnet 1.x
Voice over IP phone
192.168.15.1
Subnet
200.x
Linksys Wireless
Router 802.11b/g
192.168.1.2 (gateway)
192.168.100.1
192.168.100.2
Ethernet 0/0
Subnet 100.x
`
DHCP, 192.168.200.x
192.168.200.1
Ethernet 0/1
Cisco 2611 router
With DHCP
Catalyst 3500XL Switch
VLAN1 192.168.200.5
Configuring the router
(Command-line)
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Use HyperTerminal Private Edition
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Settings 9600, 8-N-1, hardware
Initial configuration using serial terminal
and 180° cisco cable into console port
Unprivileged and privileged modes
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Router> to Router# (all configurations)
Configuring the router (con’t)
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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
Configuring the router (con’t)
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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
Configuring the router (con’t)
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Global configuration
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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
Configuring the router (con’t)
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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
Configuring the router (con’t)
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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
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Configuring the router (con’t)
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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
Configuring the switch
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VLAN1 is associate with all ports
Assign an IP address
interface VLAN1
ip address 192.168.200.2 255.255.255.0
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Configuring the Linksys router
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Internet IP - 192.168.1.2
Gateway – 192.168.1.1
Local IP - 192.168.100.1
Gateway – 192.168.1.2
What is missing?
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Testing connectivity
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ping from nearest to farthest
traceroute
What is missing?
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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 Storage

Netdisk 250GB using NDAS
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For Local Area Network (Ethernet)