Temel Cisco IOS Komutları

IOS Basics

Router>? – Display the help menu

Router>enable – Enter privileged EXEC mode

Router#disable – Exit privileged mode to go back to user EXEC mode

exit – Exit from any mode

Router#reload – Restart the router

Router#trace 19.0.0.1 – Send a trace route to IP address 19.0.0.1

Router#ping 1.0.0.2 – Send a ping request to the IP address 1.0.0.2

Router#ping 172.16.0.1 source loopback 1 – Ping the IP 172.16.0.1 with a source IP address of the loopback 1 interface

Router#show version – Shows information about the router, including the configuration register value

Router#show startup-config – Displays the startup configuration

Router#show running-config – Displays the running configuration

Router#copy running-config startup-config – Save the running configuration to the startup configuration

Router#config terminal – Enter global configuration mode

Router(config)#hostname NewYork – Change the system’s network name to NewYork

Router(config)#enable password cisco – Set the enable password to cisco

Router(config)#enable secret cisco123 – Set the enable secret password to cisco123

Router(config)#banner motd # Property of InternetworkTraining.com # – Configure a message of the day banner

Router(config)#config-register 0x2142 – Change the config register to ignore contents of NVRAM

Router(config)#line console 0 – Configure the line console

Router(config-line)#login – Enable password checking in line configuration mode

Router(config)#line aux 0 – Configure the auxiliary line

Router(config)#line vty 0 4 – Configure the virtual terminal lines

Configuring Router Interfaces

Router#config terminal – Enter global configuration mode

Router(config)#interface s0/0 – Configure the serial 0/0 interface

Router(config-if)#ip address 13.0.0.1 255.0.0.0 – Assign an IP address and subnet mask to an interface

Router(config-if)#clock rate 64000 – Configure a clock rate on a DCE interface

Router(config-if)#no shutdown – Bring up the interface

Configure Static and Default Routes

Router(config)#ip route 13.0.0.0 255.0.0.0 s0 – Create a static route to 13.0.0.0/8 network via Serial 0 interface

Router(config)#ip route 0.0.0.0 0.0.0.0 null0 – Create a default route and send all default traffic to the ‘bit bucket’

Router#show ip protocols – View routing protocol information on the router

Router#show ip route – View the contents of the routing table.

Router#show interface s0/0 – Show details about the interface s0/0 (Serial 0/0)

Configure RIP Routing Protocol

Router(config)#router rip – Configure the RIP routing protocol

Router(config-router)#network 15.0.0.0 – Assign a network to RIP

Router(config-router)#version 1 – Explicitly state you want to use RIP version 1

Router(config-router)#version 2 – Explicitly state you want to use RIP version 2

Router>show ip route – View the contents of the routing table.

Router>show ip route rip – View the routes in the routing table discovered by RIP.

Configure EIGRP Routing Protocol

Router(config-if)#bandwidth 1 – Change the bandwidth parameter used by EIGRP for the interface to 1kbps

Router(config)#router eigrp 10 – Enable EIGRP routing protocol for autonomous system 10

Router(config-router)#network 15.0.0.0 – Tell EIGRP what networks to advertise

Router#show ip route eigrp – Display routes discovered only by the EIGRP protocol

Configure OSPF Routing Protocol

Router(config-if)#ip ospf priority 10 – Set the priority which will determine the designated OSPF router

Router(config-if)#ip ospf cost 25 – Manually set the OSPF link cost

Router(config)#router ospf 10 – Enable OSPF routing protocol using a process ID of 10

Router(config-router)#network 172.16.1.0 0.0.0.255 area 0 – Advertise a network using OSPF and assign it to area 0

Router(config-router)#default-information originate – Allow default routes to be propagated

Router#show ip ospf neighbor – View the OSPF neighbors

Router#show ip ospf – View general information about the OSPF routing processes

Router#show ip ospf interface – View the OSPF protocol information for the interfaces on the router

Router#show ip ospf interface loopback1 – View the OSPF protocol information for the loopback1 interface

Configuring IP Access Lists

Router(config)#ip access-list extended BLOCK_TELNET_TFTP – Configure an extended named access control list called BLOCK_TELNET_TFTP

Router(config-ext-nacl)#deny tcp any any eq telnet – Deny all telnet packets from any source with any destination

Router(config-ext-nacl)#deny udp any host 172.16.0.2 eq tftp – Deny any TFTP traffic from any host with the destination 172.16.0.2

Router(config-ext-nacl)#permit ip any any – Permit any IP traffic

Router(config-if)#ip access-group BLOCK_TELNET_TFTP out – Assign a named access control list called BLOCK_TELNET_TFTP to an outbound interface

Router(config)#ip access-list standard 10 – Configure a standard access control list and assign it the number 10

Router(config-std-nacl)#deny host 192.168.0.2 – Deny all traffic from host 192.168.0.2

Router(config-std-nacl)#permit any – Permit any traffic

Router(config-if)#ip access-group 10 out – Assign a numbered access control list 10 to an outbound interface

Configuring NAT (Network Address Translation)

Router(config-if)#ip nat inside – Associate an interface as being inside a network

Router(config-if)#ip nat outside – Associate an interface as being outside a network

Router(config)#ip nat inside source static 192.168.0.1 68.10.150.1 – Configure a static NAT mapping from the inside local IP address 192.168.0.1 to the inside global IP 68.10.150.1

Router(config)#no ip nat inside source static 192.168.0.1 68.10.150.1 – Remove the static NAT mapping created earlier

Router(config)#ip access-list standard NAT_ADDRESSES – Create a standard named ACL

Router(config-std-nacl)#permit 192.168.0.1 0.0.0.0 – Permit the IP address 192.168.0.1

Router(config)#ip nat inside source list NAT_ADDRESSES interface serial0 overload – Create an overloaded NAT mapping using the access control list called NAT_ADDRESSES and assign it to the inside global interface.

Router#show ip nat translations – View the NAT translations table to view static and dynamic mappings

Router#show ip nat statistics – View the NAT statistics

Configuring PPP

Router(config)#username internetwork password cisco – Specify the username and password that is to be used with authentication

Router(config-if)#encapsulation ppp – Set the encapsulation to PPP

Router(config-if)#ppp authentication pap – Set PPP authentication to use PAP

Router(config-if)#ppp authentication chap – Set PPP authentication to use CHAP

Router(config-if)#ppp pap sent-username internetwork password cisco – Specify what username and password the client should use to authenticate when connecting to the server using PAP

Configuring Frame Relay

Router(config-if)#encapsulation frame-relay – Change the serial interface encapsulation to

Frame Relay

Router(config-if)#frame-relay lmi-type cisco – Change the LMI type to Cisco

Router(config-if)#no frame-relay inverse-arp – Disable Inverse ARP

Router(config-if)#frame-relay map – Create manual IP-to-DLCI mapping

Router#show frame-relay lmi – Displays statistics about LMI

Router#show frame-relay map – Show current Frame Relay map entries

Router#show frame-relay pvc – Displays Frame Relay interface statistics for permanent virtual circuits

Configuring IPv6

Router(config)#interface FastEthernet 0/0 – Configure the fast Ethernet 0/0 interface

Router(config-if)#ipv6 address 2001:cdba:0000:0000:0000:0000:0000:0001/64 – Assign an IPv6 address to an interface

Router(config-if)#ipv6 enable – Enable IPv6 addressing on an interface without specifying the IPv6 address

Router(config)#show ipv6 interface brief – Show the IPv6 addresses for all interfaces

Router#show int fa0/0 | inc bia – Show the interface fast Ethernet 0/0 burned in address (bia)

Router>ping 2001:cdba::2 – Ping an IPv6 address

Switch IOS Commands

Switch#dir flash: – Displays the contents of flash memory

Switch#dir nvram: – Displays the contents of NVRAM

Switch#dir system: – Displays the contents of RAM

Switch#dir all-filesystems – Displays the contents of all the switch memory banks

Switch#show boot – Shows the boot options

Switch#erase startup-config – Erases the startup configuration

Switch(config)#interface vlan1 – Enters vlan1 interface configuration

Switch(config)#ip default-gateway 192.168.75.1 – Sets the default gateway

Switch(config)#interface fastEthernet 0/3 – Enters interface configuration mode for fa0/3

Switch(config)#switchport mode access – Assigns the port to access mode

Switch(config)#switchport port-security – Enables port security on the port

Switch(config)#switchport port-security maximum 1 – Specifies the maximum hosts that can connect to the port

Switch(config)#switchport port-security mac-address sticky – Specifies that the first host to connect will ‘stick’ to the port

Switch(config)#switchport port-security violation shutdown – Specifies what will happen if a port violation occurs

Switch#show port-security – Shows a summary of the ports and security on those ports

Switch#show port-security address – Shows the secure MAC address table

Switch#show mac-address-table – Displays the MAC address table

Switch#show port-security interface fastEthernet 0/3 – Shows the port security settings for interface fa0/3

Configuring VLANs

Switch(config)#show vlan – Display current VLANs

Switch(config)#vlan 10 – Create a VLAN with the number 10

Switch(config)#name sales – Give the VLAN a name “sales”

Switch(config-if)#switchport access vlan 10 – Assign an interface to VLAN 10

Switch(config)#vtp domain CCNA – Set the VTP domain to “CCNA”

Switch(config)#vtp mode server – Set the switch VTP mode to server

Switch(config)#vtp mode client – Set the switch VTP mode to client

Switch(config-if)#switchport mode trunk – Set a switch interface to trunk mode

Switch#show vtp status – View the VTP status on a switch

Switch#show spanning vlan 1 – Display the spanning tree information for VLAN 1

Switch#show vlan brief – Display basic VLAN information

Configuring EtherChannel

Switch(config-if)#channel group 1 mode on – Assign a physical interface to a port-channel

Switch#show interface port-channel 1 – Display information about the EtherChannel

Switch#show interface trunk – Displays the trunk information on the switch

Switch#show etherchannel 1 – Verify EtherChannel 1 status

Configuring STP (Spanning Tree Protocol)

Switch#show spanning-tree vlan 1 – Show details about the spanning tree instance on VLAN1

Switch#show spanning-tree int fa0/10 – Show details about the spanning tree for a particularport

Switch(config)#spanning-tree vlan 1 priority 4096 – Change the bridge priority on VLAN 1

Switch(config)#no spanning-tree vlan 1 – Disable spanning tree protocol

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