Category: CCNA Study Guide
Command router eigrp <AS> Use The router eigrp command is necessary to enable EIGRP (Enhanced Interior Gateway Routing Protocol). EIGRP must be enabled before carrying out any of the EIGRP commands. Syntax R1(config)#router eigrp Example In this example, EIGRP is configured on R1 using router eigrp. First, we …
Command Logging Buffered Use This is a handy command that stores log messages so they can be reviewed later. This is especially useful when you are telneting between multiple routers as you would normally miss the console or debug messages on the router your not connected to. Each …
Command Service Password-Encryption Use Allows you to encrypt all passwords on your router so they can not be easily guessed from your running-config. This command uses a very weak encryption because the router has to be very quickly decode the passwords for its operation. It is meant to …
Command Access-list (standard) Use This command is used to create a list that matches packets on a given criteria. While access-lists are most commonly associated with security, there are numerous uses. Standard lists match on source addresses only. Syntax R1(config)#access-list <1-99 or 1300-1999> <permit or deny> <source address …
Command IP HTTP Server Use This command allows the router to act as a http server. Nowadays, this command is mostly used to setup Cisco SDM. Syntax Router(config)#ip http server Example In this example we configure the ip http server command on a router to let it act …
Command Enable Secret Use Sets an encrypted password for enable mode on the router. Syntax Router(config)#enable secret <WORD> Example In this example the enable password is set on R1. R1(config)#enable secret cisco R1(config)# Next, we verify the encrypted enable password using the show run command. R1(config)#do show run …
Command IP Subnet-Zero Use This command allows you to use the zero subnet for your IP addressing. This command is enabled by default on all devices. Syntax Router(config)#ip subnet-zero Example In the below example, we will display the configured DHCP information on R3. R3(config)#no ip subnet-zero R3(config)#int fa0/0 …
Command router Use The router command allows you to enable a routing process. Syntax Router#(config)#router Optional Switches -bgp -eigrp -isis -iso-igrp -mobile -odr -ospf -rip Border Gateway Protocol (BGP) Enhanced Interior Gateway Routing Protocol (EIGRP) ISO IS-IS IGRP for OSI networks Mobile routes On Demand stub Routes Open …
Command Do Use Allows you to access privilege level commands while in configuration modes. Syntax Router(config)#do <command> Example In the below example, the router’s IP information is verified while configuring OSPF R2#conf t Enter configuration commands, one per line. End with CNTL/Z. R2(config)#router ospf 1 R2(config-router)#do sh ip …
Command Clock Timezone Use Sets the timezone of the router. Syntax Router(configure)# clock timezone <WORD> Example In this example the timezone of the router is set using the clock timezone command. R1(config)#clock timezone mtn -7 R1(config)# *Mar 1 00:36:23.155: %SYS-6-CLOCKUPDATE: System clock has been updated from 00:36:23 UTC …
