Search Results for: cisco

How to enable and configure DHCP server on Cisco Routers and switches

DHCP, Dynamic Host Configuration Protocol is the protocol used by network devices like a PC or a printer (DHCP clients) to obtain IP Address, Default Gateway, Domain Name, DNS Servers, NetBIOS servers and more that helps the device to work properly in an IP Network. The following procedure helps you to setup a Cisco Router(…)

How to enable and Configure Spanning Tree Portfast in Cisco Catalyst switch

STP Portfast is a feature in Cisco IOS which allows a switchport which is participating in STP to directly transition from Blocking mode to Forwarding mode when a device connects and the link goes up. This can improve the initial connect time and can fix some issues with Windows based devices connecting to the Active(…)

How to Upgrade IOS in a Cisco Router or a Switch – Step by Step Guide

The following procedure takes you through the steps to successfully upgrade Cisco IOS in a Cisco Router or a Switch. The latest version of the Cisco IOS can be downloaded from the Cisco Software Downloade center. You need to be a registered user to be able to download the software. Write Unsaved configurations ciscorouter#(…)

How to Backup and Restore Running-config using TFTP – Cisco Routers

There is a lot of automated config backup solutions available for free/opensource. Its worth knowing a manual backup procedure as well. Here we will discuss a simple backup procedure using a TFTP server. However, it is important to note it is not secure to use a TFTP server. Backup Running-config using TFTP ciscorouter# copy running-config(…)

How to configure backup and restore Cisco Routers switches using a FTP Server

To backup a Cisco Router or Switch to a FTP server, the FTP server should be reacheable from the router or switch. Logon to the Router/switch and enter the Privilege Exec mode using the enable password. Enter Global Configuration mode ciscorouter# conf term Configure FTP User ciscorouter(config)# ip ftp username confback ciscorouter(config)# ip ftp password(…)

How to Disable Routing updates on interfaces of Cisco Routers

When we configure a routing protocol on Cisco IOS Routers, it is important to consider preventing Routing updates sent on interfaces that are not required to (say a LAN where there is no other router in the segment to receive any updates). This ensure we are not passing updates that could cause network issues. Needless(…)

How to Configure Multiple Interfaces in Cisco IOS

Sometimes, simple tasks like enabling a bunch of Administratively shutdown ports, assigning a range of switchports to a particular VLAN can become boring and tedious. This is where the “interface range” can help where we can specify a comma seperated list of range of ports or vlans in the interface configuration mode and any command(…)

How to Configure Cisco Router as Caching/Forwarding DNS Server

A Cisco Router running Cisco IOS can function as a Caching or Forwarding DNS Server which answers to DNS queries from clients either from its host table or cache or forward it to a DNS server which can respond to the query. This feature can come in handy in small network environments where the router(…)