Latest Posts

Several of us at TCP Performance and the Mathis Equation for calculating TCP performance due to packet loss.) UDP applications wouldn’t have any feedback and would continue to monopolize the [...]

Denise and I are showing off our CCIE tattoos with John Chambers at CiscoLive yesterday evening after the CCIE NetVet reception. We noticed again that Denise and I were the [...]

Any devices that implement the

What are your critical network problems? Every network has them. They are the problems that cause network outages, or are the precursor to network outages. Most networks have similar designs [...]

I’ve been working with QoS on the Nexus 5000 (N5K) and Nexus 2000 (N2K) for medical grade networks, so I thought I would write up a couple of articles on my findings. This is the first article in I think what will be a two part series. MQC BACKGROUND The…

Congratulations to Denise Donohue who is now a Cisco Business Architect! Denise recently completed the rigorous Business Architect Transformation Program, and graduated as one of the first Business Architects. More information is available at our press release Denise Donohue Earns Business Architect Certification.

I’ve been doing a number of device configuration changes as a result of the things that NetMRI and syslog are reporting in a customer network. Both NetMRI and syslog have [...]

Until recently, Cisco customers were required to use the Unified Computing System (UCS) platform when running Unified Communications (UC) applications in a virtual environment. On June 7th Cisco introduced a new support model called "Specification-Based Hardware Support". With this announcement Cisco widens virtualized platform support to include IBM and HP.

Device Registration and VCS Clustering Introduction and Background Introduction When running a VCS cluster, some consideration needs to be given to the endpoint configuration parameters for client registration since providing [...]

A few weeks ago in Cisco VCS Clustering Configuration, I wrote about configuring and initializing a Cisco Video Communication Server (VCS) cluster. When running a VCS cluster, some consideration needs to be given to the endpoint configuration parameters for client registration.

Sometimes you really need to know where a given device is located in the network. I quickly can think of 3 cases: Case 1: Syslog suddenly starts reporting failed login [...]

Early last week I presented at the Cisco Mid-Atlantic User's Group (CMUG) with my colleague, William Bell.  My presentation focused on providing an overview of updates and highlights for the 8.x releases of Cisco Unified Communications Manager (CUCM) and Cisco Unity Connection (CUC).  A PDF version of those presentations is…