Week One: Initial BigIP LTM VE Configuration Using Bigpipe Commands To Add VLAN & Self IP Address

The below article is the first in a series of articles to help get you more familiar with the BigIP BigPipe commands used to manage an LTM VE or Local Traffic Manager Virtual Edition installed in VMWare Player as noted in this article. After following the steps in this article you will have created two VLAN’s (Virtual Local Area Networks) and added an IP address to each VLAN which will be the foundation of the series of articles that will help you setup and configure your LTM VE to do basic load balancing followed by other articles that build on that foundation. The future articles will become more in depth by first taking you through basic troubleshooting steps using and overtime using more advanced techniques for troubleshooting issues on a BigIP Local Traffic Manager.

Technology Errors

Cisco Catalyst 2950: When no shut One VLAN The Other VLAN Goes Down

A couple days ago I was working on the network at the computer shop and ran into an issue configuring the Cisco Catalyst 2950 switch we have on part of the network. The goal was to set up three VLAN’s to segregate traffic on three segments of the network that each have their own purpose. One of the VLAN’s is used by the employees, one VLAN used for the public, and the third VLAN used to host servers that provide various services. I was in a rush to minimize downtime when I was configuring the access to the 2950 switch itself and attempted to assign an IP address to two of the VLAN’s. Below I explain the details of the issue that caused as well as an explanation of why this won’t work.

Technology Insights

Linksys WRT600N Running DD-WRT Wireless Devices Not Communicating With Wired Devices

If you are having trouble communicating between the wired and wireless networks after installing or upgrading your Linksys WRT600N wireless router with dd-wrt firmware then the issue is likely related to the VLAN configuration. After you flash the firmware on a Linksys WRT600N you will have the default dd-wrt settings. One of these settings includes separating the wired and wireless traffic because this is the correct way to secure things because the wireless network is much more likely to be breached than the wired network. Switching this setting to allow communication between wired and wireless devices is easy by following the directions below.

  1. Login To WRT600N: Visit the web administration GUI at your routers internal IP address using the HTTPS protocol. If HTTPS is not set up then you should first configure that before you proceed.