Blog

Pete Welcher at Chesapeake NetCraftsmen recently told the interesting story of a customer who added a backup data center.  Their network was configured to support multicast.  Pete describes the problem [...]

For those of you who either like to run queries on the Call Manager, have customers who do so, or have tools that customers use for change management and the like, [...]

While I was at VoiceCon in San Francisco, CA a few weeks ago, I had the opportunity to stop by Cisco and record two video segments for the What CIOs [...]

Back in my day … The folks who worked with CUCM database replication issues remember the days when we were able to use SQL enterprise manager or the dblhelper application [...]

I’m working on a network that requires configuration checks be performed.  For some of the subsystems, that’s pretty easy because the configuration is done per device and there are no [...]

I’m working on a network that requires configuration checks be performed.  For some of the subsystems, that’s pretty easy because the configuration is done per device and there are no [...]

I offer you a handy dandy tool for testing, resetting, validating DSPs on a Cisco voice gateway (tested on ISR models): Hidden Command: test voice driver It will start a [...]

Have you ever looked at an access list and wondered what the port numbers correspond to, other than the obvious ones that are well-known or documented in /etc/services?  I've been working on ACLs for classification and marking of voice/video control traffic and David Hailey of NetCraftsmen pointed me to a…

I was part of several folks chatting this week about the Certified Cisco System Instructor (CCSI) certification. This program is older than any of Cisco’s other certification programs, including the [...]

The Cisco Press book Applied Infrastructure blog under

I’m speaking at VoiceCon San Francisco 2008 on the topic of Troubleshooting in Converged Networks.  That’s a fancy title to say that I’ll be talking about VoIP troubleshooting.  There are [...]

Microsoft Windows Server Update Services (WSUS) provides a method for managing Microsoft updates for company computers. Within a company, there are one or more WSUS servers that gets updates from Microsoft. Computers, within the company network, check in with this WSUS server to get their Microsoft updates.