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It was great to have the chance to attend the September 4, 2014 UCS GrandSlam event / launch with Tech Field Day. One indicator of the importance of the announcements [...]

I just received an email about Spring ONUG with Tech Field Day. That’s a reminder that flies when you’re having fun — or working a lot. Or both (those occasional [...]

In case you hadn’t noticed yet, Cisco plans a big UCS related announcement for September 4 in New York City. They’re calling it the “UCS Grand Slam”. I and several [...]

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 … [...]

One of my customers is using MPLS VPNs from his service provider to support two separate divisions at his site. We implemented VRFSs (virtual routing and forwarding instances) on his edge MPLS router and on his core Nexus 7K to provide two separate routing instances. This article compares some of…

Edited by Marilyn Outerbridge A very cheap and effective way to perform rudimentary packet-header capturing in IOS is to use the log/log-input keyword at the end of an ACE. This is very easily done. This blog will use the following simple topology for the demonstrations. Basic ACL Logging (Default Settings)…

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, [...]

One of my customers is planning to migrate his data center network to Rapid Spanning Tree. Although RSTP is a well established technology, it will be new to his site. Cisco has a migration discussion here: Spanning Tree from PVST+ to Rapid-PVST Migration Configuration Example Building on that discussion, I…

Cisco has courage. The world of IT is changing, and rather than cling to the successes of the past, Cisco is trying to embrace and shape the future.  Bruce Klein [...]

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…