Can anybody give me a step by step guide for setting up multiple VLANs on a Cisco 1841 modular router? I can't find anything to help me through my problem, which, incidentally, is that I can create ...

Use the Cisco IOS archive command to archive your router’s configuration David Davis introduces the Archive command in Cisco, which you can configure to log all commands on your router. If you need to ...

Many administrators forget—or don’t even realize—that they can configure Dynamic Host Configuration Protocol (DHCP) on Cisco IOS routers and switches. David Davis discusses the pros and cons of this ...

A virtual LAN is a logical division of a network that enables devices to communicate as if they are connected to a single switch. These divisions are critical to network security, performance and ...

Many network engineers consider the CLI as their tool of choice when managing network devices. For years, they've made configuration changes comfortably from the CLI, gaining confidence and experience ...

Rick Cook learned programming on a computer with magnetic drum memory. Since then he's written thousands of articles on all aspects of computers and high technology — as well as several fantasy novels ...

In Cisco LAN switch environments, the native VLAN is typically untagged on 802.1Q trunk ports. This can lead to a security vulnerability in your network environment. It is a best practice to ...