Acknowledgements — Introduction — The OSI Model — Application Layer — Transport Layer — Network Layer — Addressing — Routing Protocols — Data Link Layer — Switching — Physical Layer — Router Operation — Advanced Addressing Topics — Advanced Routing Topics — Advanced Switching Topics — Security — WAN — Configuration — Conclusion — References — About the Exam — Cisco Router Commands — Quick Reference Sheet
Configuration
Getting started with Cisco
The basic router prompt, called user exec mode, - If it's not properly configured means, Router >
If it's configured properly means, Hostname of router >
Modes
Router>? or Router>show ? Router# - privileged exec mode
Configuring your Cisco Router
Router#show interfaces Router#show ip protocols Router#show ip route Router#show ip arp
Then go to the global configuration mode...
Router#config Router(config)#
Configuring Hostname
Router(config)#hostname ExampleName ExampleName(config)#
Designate the DNS server
ExampleName(config)#ip name-server aa.bb.cc.dd ExampleName(config)#ctrl-Z ExampleName#
Then save configuration using CTRL+Z
Configure Serial and Ethernet Interfaces
ExampleName#config terminal ExampleName(config)#interface ethernet 0/1 ExampleName(config-if)#ip address 192.168.10.1 255.255.255.0 ExampleName(config-if)#[Ctrl-Z]
ExampleName#config ExampleName(config)#interface serial 1/1 ExampleName(config-if)#ip address 192.168.155.2 255.255.255.0 ExampleName(config-if)#no shutdown ExampleName(config-if)#ctrl-Z ExampleName#
Note the no shutdown command. An interface may be correctly configured and physically connected, yet be "administratively down". In this state it will not function. The command for causing an interface to be administratively down is shutdown.
Configuring Cisco Routing
ExampleName(config)#ip routing ExampleName(config)#ctrl-Z ExampleName#config ExampleName(config)#ip route 172.16.0.0 255.255.255.0 192.168.150.1 ExampleName(config)#ctrl-Z ExampleName#show ip route
Configuring Access Lists and Network Security
Interface Serial0 ip access-group 101 in ip access-group 6 out access-list 10 permit 234.5.6.12 access-list 10 deny 5.10.10.32 0.0.0.31 access-list 10 permit 5.10.0.0 0.0.255.255 access-list 10 permit 123.234.0.0 0.0.0.255
access-list 101 permit tcp any any established access-list 101 permit tcp any 204.34.5.25 host eq 80 access-list 101 permit ip 203.45.34.0 0.0.0.255 204.34.5.0 0.0.0.255 access-list 101 permit tcp 203.44.32.0 0.0.0.31 204.34.5.0 0.0.0.255 eq telnet access-list 101 permit tcp any 204.34.5.10 eq smtp
References
http://www.opennet.ru/soft/cisco-configuration.html http://www.tele.pitt.edu/~telelab/labs/General%20Lab%20Documentation/pdf/GeneralLab%20Documentation~Cisco%20Router%20Configuration%20Tutorial~08.20.05.pdf