Configuring a Cisco router or switch as a DHCP server

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cisco

Overview

Dynamic Host Configuration Protocol (DHCP) is a client/server protocol which allows you to allocate network configuration parameters like IP addresses, subnet masks, DNS servers, default gateways and many more to end devices. This protocol uses the UDP ports 67 and 68 as defined in RFC 2131. Nowadays allmost network devices support DHCP including workstations, printers, IP phones, handheld devices etc. Using dynamic IP address assigment you can minimize errors which can appear on manual configuration and also reduce the administrative overhead. Cisco embedded the DHCP server functionality beginning with IOS Version 12.0(1)T. By default, the Cisco IOS DHCP server and relay agent features are enabled but are not configured.

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How to configure logging on Cisco IOS

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cisco

Overview

Device logs often offer valuable information when troubleshooting a network issue. Interface status, security alerts, environmental conditions, CPU process hog, and many other events on the router or switch can be captured and analyzed later by studying the logs. By default, all log messages on a Cisco router or switch are sent to the console port. Only users that are physically connected to the console port may view these messages. If you are connected to a Cisco device via Telnet or SSH and want to see console messages, you can enter the command terminal monitor in privileged exec mode. Cisco devices support five types of logging:

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