Seminar ON CISCO ROUTER CONFIGURATION. CONTENT Introduction to Router Series of Router Interfaces of...
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Transcript of Seminar ON CISCO ROUTER CONFIGURATION. CONTENT Introduction to Router Series of Router Interfaces of...
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Seminar ONCISCO ROUTER CONFIGURATION
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CONTENT
Introduction to RouterSeries of RouterInterfaces of RouterTypes of RouterProtocols used in RouterConfiguring a Router Configure RIP & IGRP protocols
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What is Router & why we use it?
Router is basically a special computer that select the best path.Operate on physical, data & network layer in the OSI model.Uses protocols for determine a best path(such as RIP,IGRP etc).It also perform a switching function.Router has four basic components:1. CPU2. I/O interfaces3. Memory4. Bus connecting to the component
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Cisco Router Models
Cisco routers come in variety of models, ranging from the 600 series to the 12000 series.
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INTERFACES OF ROUTER
LAN Interface:-Includes one or more Ethernet or Token
Ring interface.
WAN Interface:-Responsible for connecting the
customers’ n/w to WAN services.
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TYPES OF CISCO ROUTERS
Fixed Router:-Have fixed interfaces means can’t change
after installation.
Modular Router:-Have not fixed interfaces means can
change according to need.
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PROTOCOL USED IN CISCO ROUTER
RIP (Routing Information Protocol)
IGRP (Interior Gateway Routing Protocol)
OSPF (Open shortest path first)
EIGRP (Enhance Interior Gateway Routing Protocol)
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RIP Protocol
Standard internet protocol.Sends periodic routing updates every 30 sec.Sends triggered updates whenever topology changes occur.Used a hope count metric. Paths with the smallest hope count are the best.Define a maximum hope count of 16.Allow up to 25 routes in a single routing update packet.Support multiple Routed protocols.Comes in 2 versions (ver1 & ver2).
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IGRP Protocol
Sends periodic routing updates every 90 sec.Sends triggered updates whenever topology changes occur.Has a maximum hope count of 255.Currently runs in only TCP/IP and OSI network.Default Administrative Distance=100
In addition, IGRP support 2 types of route in TCP/IP environment:-Interior Routes (routes within an AS)Exterior Routes (routes outside the AS)
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Interior Routes
subnet 2 Subnet 3
Network 10.0.0.0 Subnet 4
subnet 1
IGRP interior routes in AS
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Exterior Routes
Exterior route
Autonomous System 20
Autonomous
System 10
Exterior route outside the AS
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CONFIGURE A CISCO ROUTER
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Logging into the router
This I called user mode and is mostly used to view statistics, it is also a stepping-stone to logging into privileged mode.
Router>Router>enableRouter# Router# indicates the privileged mode where we can both view and router
configuration. 14We can go back from privileged mode into user mode by using the
disable command. Router# disableRouter> At this point, you can type logout to exit the console: Router# logout
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Router Modes
To configure from CLI (Command Line Interface), we can make global changes to the router by typing configure terminal (or config t for short), which puts us in global configuration mode and changes what’s known as running-config. We can type config from the privileged mode prompt and then just press Enter to take the default of terminal.
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FORMAT OF CONFIGURATION
Router>Router > enRouter # config tRouter (config) # hostname (i.e. Router name) Router (config) # interface (serial or ethernet)Router (config-if) # ip address subnet maskRouter (config-if) # no shutRouter (config-if) # copy run start Router (config) # exit (back to previous mode)
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This figure shows four routers: - 2500A, 2500B, 2500C, 2621A. These routers, by default, only know about their direct connected networks. The three 2501 routers connected via a WAN and the 2621 router connected via the Ethernet network off 2501A.The first step is to configure each router with the correct configuration.
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Following table shows IP address scheme that I’ll used to configure the router
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2621A configuration
2501A configuration
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2501B configuration
2501C configuration
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General Format For RIP Configuration
Router>
Router>en
Router(config)#router rip
Router(config-router)#network net_id
Router(config-router)#^z
Router#copy run start
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General Format For IGRP Configuration
Router>
Router>en
Router(config)#router igrp
Router(config-router)#igrp autonomous-system-number
Router(config-router)#network net_id
Router(config-router)#^z
Router#copy run start