Category: CCNA Study Guide
Command No Use Negates a command. Syntax Router(configure)# no <command> Example In this example the no shut command is used to negate the shut command to set the status of fa0/0 to up on R1. R1#conf t Enter configuration commands, one per line. End with CNTL/Z. R1(config)#int fa0/0 …
Command IP dhcp excluded-address Use This command prevents IP addresses from being assigned by the router’s DHCP server. This is used to prevent IP conflicts with statically assigned servers and routers. Syntax Router(config)#ip dhcp excluded-address <low IP> <high IP> Example In the below example we will configure R2 …
Command IP NAT Pool Use This command is used to create a pool of IP addresses that NAT will translate other addresses into. The address range is used on a first come, first serve basis. Syntax R1(config)#ip nat pool <name> <low ip> <high ip> netmask <subnet mask> Example …
Command Router Rip Use The router rip command is necessary to enable RIP. RIP must be enabled before carrying out any of the RIP commands. Syntax R1(config)#router rip Example The following example demonstrates the router rip command. First, the show ip route command is issued to help determine …
Command End Use While in configuration mode, using the end command will return to privileged mode. Syntax Router(config)#end Example In this example, the end command is issued to return to privileged mode. R3(config)#int fa0/0 R3(config-if)#end R3#
Command IP Access-list Use This command is used to create named access-lists that matches packets on a given criteria. While access-lists are most commonly associated with security, there are numerous uses. The benefit to named access-list is that you can assign a logical name and also reorder the …
Command IP Route Use Allows you to set static routes to define how to reach remote networks.. Syntax Router(config)#ip route <network> <mask> <next hop> Example In the below example we will configure R1 to be able to ping R3 R1(config)#ip route 3.3.3.3 255.255.255.255 10.1.1.2 R1(config)#do show ip route …
Command IP Host Use Allows you to set DNS names for devices on your network. Syntax Router(config)#ip host <name> <ip address> Example In the below example R1 is configured to be able to ping R2 and R3 R1(config)#ip host R2 2.2.2.2 R1(config)#ip host R3 3.3.3.3 R1(config)#do ping R2 …
Command IP DHCP Pool Use This command enables DHCP services on the router and specifies the various DHCP options the server will assign to clients. Syntax Router(config)#ip dhcp pool <name> Options <network> network addresses that the DHCP pool may assign, this supports slash notation. Ex network 192.168.1.0 255.255.255.0 …
Command IP Classless Use This command allows your router to ignore classful IP boundaries when processing packets. This command is on by default. Without this command the router would not be able to correctly process default routes and discontinuous networks. Syntax Router(config)#ip classless Example Example In this example, …
