Peter Welcher

I’d like to tell you a little story about something that came up recently when troubleshooting Wireless (WLAN) multicast (“IPmc”). I ran into something that was a bit unexpected … [...]

I recently had the pleasure of attending the http://opennetworkingusergroup.com. My thanks go to page dedicated to ONUG, where you can find links to blogs posted by the other attendees. I won’t repeat [...]

A blog I wrote was recently posted on blogs.cisco.com. It is about how appropriate design can prepare for automation -- and that the lesson from automation is that we should be using "cookie cutter" standard designs, where each remote site or office is not a one-off design. If you're interested,…

On Sunday afternoon 5/4/2014 I’ll be heading to New York City. I’ll be joining some of the Tech Field Day bloggers extraordinaire on Monday and Tuesday 5/5-6/2014, for HP Networking, [...]

Recently, Cisco generously provided a briefing to the CiscoChampions, updating the group with new details about Cisco ACI. The presentation was NDA until April 2, I presume coordinated with announcements to be made at InterOp. The biggest new item I noticed was OpFlex. I'll tell you what I know about…

Here in the Baltimore-DC area, we can't wait for Spring to end all the cold snowy weather we've been having. We don't quite see the signs yet. We need a new groundhog! Anybody want a used one? In contrast, things are really heating up and getting exciting with DFA and…

Ever since I heard that the Nexus 9K has 50% less code, I've been wondering what features were removed from the code. So I did my best to figure it out, since I haven't seen a detailed features list from Cisco yet (early days and all that). I've also noticed…

The Cisco announcement last November of Insieme ACI and Nexus 9K hardware gave us a plethora of choices, and left many wonder what Nexus box they should use, and where. It behooves us all to understand the Cisco Nexus product positioning, since they aren't cheap, and we don't want to paint…

I get the strangest looks when I talk about POAP and ask people "Why Aren't You Using It?" Admittedly, it doesn't help that I like to pronounce acronyms like words, and POAP comes out sounding like "Pope" or perhaps "Poe-App". Perhaps it will help if I mention that POAP is…

The good news is that there are lots of ways to capture packets on Cisco device. That's also the bad news: there are many different ways to do differing degrees of capture, depending on the device type! No doubt this is a side effect of the independent and somewhat Darwinian…

I presented a Cisco Mid-Atlantic Users Group session on "Datacenter Topics" today. It covered NSX, DFA, ACI, among other things. I even said "SDN" a couple of times. And thanks to the 80 or so people that braved snow (flurries) to attend! And those who drove 2-3 hours! The intent of…

In this blog, I'd like to come at Practical SDN from a different point of view. Thanks to all those who slogged through the previous blogs in the series. I suspect those either had too much or too little information in them, depending on your point of view. Anyway, I've been…