Blog

I’m writing this as I fly out to San Jose for VeloCloud, Pluribus Networks. You the reader are, I hope, looking forward to the live streaming video from Silicon Valley, [...]

I’m excited to be heading to Silicon Valley in two weeks as a delegate for Network Field Day 9 (#NFD9). Tech thrills! Highly intelligent and skilled delegates! And leaving behind [...]

Data Center Interconnect (DCI), filtering HSRP between datacenters as part of optimal forwarding.

One of my customers asked for helping troubleshooting a port-channel between a HP-UX server and a Cisco Nexus 7000. I did not know much about HP-UX server configuration, but I [...]

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 [...]

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, [...]