Peter Welcher

In October 2009, Dr. Pete Welcher presented these slides at a Bluesnet Network Advisory Group meeting in Santa Barbara, CA. This presentation covers some of the acronyms and basics of [...]

 That’s “Ethernet over MPLS” to you!  My blog from a couple of days ago mentioned that the Catalyst 6500 with Sup720 has great forwarding performance with EoMPLS, without adding any [...]

This blog is a quick summary of some port-related tidbits I’ve run across recently.  Port Security Sticky We recently updated a Dev lab data center with new Cisco 6509 switches, [...]

This article is triggered by some recent work I’ve been doing. We are migrating a customer with an old Nortel switching infrastructure to a high-speed Cisco 6509-based infrastructure with a lot [...]

I’ve been working with two customers that I’d describe as “rural fiber network providers”. For background info, see the blog about Rural Fiber Networking. As I noted there, one of my [...]

I’ve been working with two customers that I’d describe as “rural fiber network providers”. Their designs and business objectives differ somewhat. (For more about one, Google “Michael Minnich” and “fiber [...]

I just spent some time on an interesting and somewhat obscure ASA troubleshooting problem. It ended up being resolved by a note in some of the Cisco web pages, something [...]

Monday 8/31/09 I’ve put some additional comments and updates / corrections into the Impressions #01 blog article in blue. See 

Sunday 8/30/09  Updated Monday 8/31/09 and Monday 9/7/09 I’m attending VMWorld in San Francisco this week, August 31, 2009 to September 3, 2009. Purpose: to learn more about the business and [...]

(Updated 9/30/09) For a while I've been loosely tracking TCP/IP performance information. I'd like to share some information about this area. I claim some insight but freely admit I'm still learning. Motivation: It seems like over the last two years, a number of application WAN (MPLS VPN, etc.) performance issues…

I’ve been learning all I can about VMWare, vSphere, and Cisco 1000v, along with soaking up Cisco’s ideas of data center virtualization. And reading up on cloud computing. Meanwhile, I’m [...]

In the middle of a deployment, Jim Marinelli and I discovered a small surprise (to us, anyway). Recent SXH or SXI code, possibly VSS in the mix. (I’d like to [...]