Author: upravnik

It is recommended to set the correct timezone and adjust the DST setting before configuring a router as an NTP client. The syntax of the command used to set the timezone is: (config)clock timezone NAME HOURS [MINUTES] The name of Read More …

A default route defines where packets will be sent if no specific route for the destination network is listed in the routing table. If no default route is set, the router will discard all packets with destination addresses not found Read More …

Just like regular hosts, if a Cisco router wants to exchange frames with a host in the same subnet, it needs to know its MAC address. The IP-to-MAC address mapping are kept in the router’s ARP table. Consider the following Read More …

An URL is a string of characters that contains information about how to fetch a resource from its location. An URL specifies the primary access mechanism and the network location of a resource. A typical URL consists of the following Read More …

In one of the previous lessons we’ve defined a static route for a specific subnet by using the subnet mask of 255.255.255.0 in the ip route command. IOS also allows you to specify a static host route for a single Read More …

A rollover cable is usually shipped with each Cisco device. This cable connects a serial port on your computer to the console port of the device and it is used for the device’s initial configuration. It is called rollover because Read More …

We’ve learned it is possible to configure local usernames and passwords on a Cisco device and then use them to login to the device. To do this, we’ve used the username USER password PASSWORD command, like in the example below: Read More …

By default, any single word entered on an IOS device that is not recognized as a valid command is treated as a hostname to which you want to telnet. The device will try to translate that word to an IP Read More …

By default, an IOS device will disconnect a console or VTY user after 10 minutes of inactivity. You can specify a different inactivity timer using the exec-timeout MINUTES SECONDS line mode command. For example, to disconnect a console user after Read More …

By default, IOS displays syslog messages to the console users at any time, even during the typing of a command. Consider the following example: R1(config-if)#ip address 192.168.0.100 255.2 %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to down 55.255.0 Notice Read More …