I'm using Cisco 3550 & 3560 switches for WAN routing with enhanced IP images. They are connected to Microwave radios of various speeds (45Mb, 100Mb, 622Mb) depending on the link. I setup VLAN's to ...

If I have a handful of "smart" switches that will handle 802.1Q vlan tagging both at the perimeter and the core of my network, will the tags survive if there is a completely dump unmanaged switch ...

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 ...

Q: I have a Cisco L3 3560 switch, 5 unmanaged switches and 150 users. I need to create 10 VLANs. How can I configure my VLAN given the switches I have? It depends on how many users you would need in ...

It's easy to see why virtual LANs have become popular on networks of all sizes. Imagine having multiple separate physical networks within a single organization — without the headache of managing ...

There are thousands of commands and subcommands available to configure a Cisco Adaptive Security Appliance, and as you gain knowledge of the appliance, you will find yourself using more and more of ...

Probably the most common network interconnection device in industry networks are layer 2 switches. We often refer to them Ethernet switches because the vast majority of them have only Ethernet ...

A Cisco switch configured as an access layer port with a voice vlan is actually an 802.1Q trunk that will only allow traffic tagged on the voice vlan. The last exception is very seldom used, but does ...

This IP lesson will focus on layer two switches, which are almost exclusively Ethernet switches. We’ll also consider how they are used to implement virtual local area networks (VLANS). Figure 1: L2 ...