Router user interface• The Cisco IOS software uses a command-line interface (CLI) as the traditional console environment.• This environment is accessible through several methods: – Console – AUX port (modem) – Telnet
Establishing a HyperTerminal session Router Console port Terminal or a PC with Rollover cable terminal emulation software Com1 or Com2 serial portTake the following steps to connect a terminal to the console port on the router:• Connect the terminal using the RJ-45 to RJ-45 rollover cable and an RJ-45 to DB-9 or RJ-45 to DB-25 adapter.• Configure the terminal or PC terminal emulation software for 9600 baud, 8 data bits, no parity, 1 stop bit, and no flow control.
Establishing a HyperTerminal session =• Important: A console connection is not the same as a network connection!
Logging into the router• Two commands can be used to set a password used to access privileged EXEC mode: enable password and enable secret• The following are specific modes that can also be accessed from the global configuration mode: – Interface – Subinterface – Line – Router – Route-map
CLI command modesRouter>enable The command ExitRouter#configure terminal will take you up oneRouter(config)# interface fa 0/0Router(config-if)# level
Configuring a router name Router#config t Router(config)#hostname Tokyo Tokyo(config)#
Configuring a serial interfaceConfiguring an IP Address on an interface…Router(config)#interface serial 0/0Router(config-if)#ip address <ip address> <netmask>
show ip interface commandRouter# show ip interface briefInterface IP-Address OK? Method Status ProtocolEthernet0 184.108.40.206 YES manual up upSerial0 220.127.116.11 YES manual administratively down down What is wrong here? The administrator has either done a “shutdown” on the interface or has forgotten to do a “no shutdown”.• A serial interface will not show “up” and “up” unless both ends are properly configured (mostly) and the no shutdown command is used.• If one router’s configuration looks okay, check the other router’s configuration.
Configuring a serial interface Lab DCE DTE Real world• On serial links that are directly interconnected, as in a lab environment, one side must be considered a DCE and provide a clocking signal.• The clock is enabled and speed is specified with the clock rate command.Router(config)#interface serial 0/0Router(config-if)#clock rate 56000 (on DCE end Only)Router(config-if)#no shutdown
Configuring an Ethernet Interface
Configuring a Dynamic Routing Protocol:Configuring RIPv1First, RIP is enabled on each router.From global configuration you will enter the command (the default is RIPv1):Router(config)#router ripSecond, Once you are in the Router RIP configuration sub- mode, all you need to do is enter the classful network address for each directly connected network, using the network command.Router(config-router)#network directly- connected-classful-network-address
Example First, we Configure the interfaces on each router SanJose2 hostname SanJose2 interface ethernet 0 ip add 192.168.1.1 255.255.255.0 interface serial 0 ip add 192.168.2.1 255.255.255.0 SanJose1 hostname SanJose1 interface ethernet 0 ip add 192.168.3.1 255.255.255.0 interface serial 0 ip add 192.168.2.2 255.255.255.0 clockrate 64000 interface serial 1 ip add 192.168.4.2 255.255.255.0 clockrate 64000When done configuring the Baypointe hostname Baypointeinterfaces use the interface ethernet 0 ip add 192.168.5.1 255.255.255.0command: show ip interface serial 0interface brief ip add 192.168.4.1 255.255.255.0
Second, we configure RIPv1Here are the commands for each router:SanJose2#configure terminalEnter configuration commands, one per line. End with CNTL/Z.SanJose2(config)#router ripSanJose2(config-router)#network 192.168.1.0SanJose2(config-router)#network 192.168.2.0Baypointe#configure terminalEnter configuration commands, one per line. End with CNTL/Z.Baypointe(config)#router ripBaypointe(config-router)#network 192.168.4.0Baypointe(config-router)#network 192.168.5.0SanJose1#configure terminalEnter configuration commands, one per line. End with CNTL/Z.SanJose1(config)#router ripSanJose1(config-router)#network 192.168.2.0SanJose1(config-router)#network 192.168.3.0SanJose1(config-router)#network 192.168.4.0
Third, We check on the routing table for eachrouterSanJose2#show ip routeCodes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP <omitted> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default U - per-user static route, o - ODRGateway of last resort is not setR 192.168.4.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0R 192.168.5.0/24 [120/2] via 192.168.2.2, 00:00:10, Serial0C 192.168.1.0/24 is directly connected, Ethernet0C 192.168.2.0/24 is directly connected, Serial0R 192.168.3.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0SanJose2#
Third, We check on the routing table for each routerSanJose1#show ip routeCodes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP <omitted>Gateway of last resort is not setC 192.168.4.0/24 is directly connected, Serial1R 192.168.5.0/24 [120/1] via 192.168.4.1, 00:00:12, Serial1R 192.168.1.0/24 [120/1] via 192.168.2.1, 00:00:10, Serial0C 192.168.2.0/24 is directly connected, Serial0C 192.168.3.0/24 is directly connected, Ethernet0
Third, We check on the routing table for each routerBaypointe#show ip routeCodes: 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, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default U - per-user static route, o - ODRGateway of last resort is not setC 192.168.4.0/24 is directly connected, Serial0C 192.168.5.0/24 is directly connected, Ethernet0R 192.168.1.0/24 [120/2] via 192.168.4.2, 00:00:23, Serial0R 192.168.2.0/24 [120/1] via 192.168.4.2, 00:00:23, Serial0R 192.168.3.0/24 [120/1] via 192.168.4.2, 00:00:23, Serial0
copy running-config startup-config During bootup running-config RAM startup-configRouter# copy running-config startup-config • Changes to the router are automatically put in the running-config file. • If the router loses power or reboots, everything in RAM is lost including the running- config file. • To make sure the changes to the router’s configuration remain saved, you must copy the running-config from RAM into the startup-config into NVRAM: Router# copy running-config startup-config
copy running-config startup-configRouter# copy running-config startup-config OrRouter# copy running startup ORRouter# copy run start ORAny usage of the command or parameters, so that they are still uniquely recognizable .WARNING• Using an incorrect configuration file name could overwrite the router’s IOS in flash, as the router believes you are trying to copy a blank file into flash.Router#copy running-config start-up **** NOTICE **** Incorrect file name!Flash load helper v1.0This process will accept the copy options and then terminatethe current system image to use the ROM based image for the copy.Routing functionality will not be available during that time.If you are logged in via telnet, this connection will terminate.Users with console access can see the results of the copy operation. ---- ******** ----Proceed? [confirm]^C%Copy cancelled by user request.Router# Press <control> C
Examining the show commands (typed fromPrivileged Mode)• Show ip interface Brief: Shows the status of the interfaces along with their IP Addresses• show startup-configuration – Displays the saved configuration located in NVRAM• show running-configuration – Displays the configuration currently running in RAM
How to Reset The Router1. Router> enable2. Router# erase start (Press enter to confirm): This step erases the configuration file3. Router# Reload : This step soft-boots the router4. After the router reloads, the following question will show: “Would you like to enter the setup mode”, Please answer “no” to that question.5. The router should now take you to user mode: Router>Note: If asked for a password, use the password system in the next slide
Router Passwords Used in the Cisco LabWill not be used for the VoIP LabsPrivilege Password ciscoConsole password conpassVTY 0 4 password vtypassAuxiliary auxpass