Architect & DE Discussions

Quitting the Legacy IP at Cisco Live Milan

It’s that time of the year again - time for some computer and human networking at Cisco Live Milan! This year I’m taking the unusual and somewhat risky step...

IPv6 is Everywhere at Cisco Live Milan

IPv6 deployment is accelerating at a fast pace. It’s exciting to see that the global IPv6 deployment figures show a continuing upward trend: Cisco has been helping the Industry track this trend with our global deployment statistics portal: http://6lab.cisco.com/stats/. Go to the portal today and you can even follow @cisco6lab on Twitter. We are also […]

Hitchhiker’s Guide to onePK

Cisco Live Milan is around the corner and I’m getting my session, The Hitchhiker’s Guide to onePK, ready for it’s European debut.  While it’s lovely to be in the CiscoLive Distinguished Speaker Hall of Fame, putting a good presentation together hasn’t gotten any easier.  The hard questions still need to be asked:  Do I have […]

Autonomic Networking – From Theory to Practice

Autonomic Networking is well understood in theory, but real, consistent and extensible implementations don’t exist. In this post I suggest a reason for the lack in execution, and our vision to provide a working, implementable Autonomic Networking Architecture. Wipe off the dust… When asking a researcher about autonomic systems, (s)he might blow the dust off […]

Extending Zeroconf Services: Cache Tuning

Introduction With the introduction of Cisco mDNS Service Discovery Gateway in IOS, customers that have implemented the solution are observing client behavior they haven’t seen prior to extending services across subnet boundaries. One of the effects is the duplicate name issue seen when devices with enabled services are moved from one L3 subnet to another […]

Cisco Service Discovery Gateway – Enabling Zeroconf in Enterprise Networks

Cisco Service Discovery Gateway – Enabling Zeroconf in Enterprise Networks I’ll admit it: I’m what others call an Apple fan boy. One of the many reasons for being one is...

Route Redistribution – A thing of the past?

This week at CiscoLive Orlando, Cisco made two announcements around Enterprise Routing – Open EIGRP and EIGRP OTP. Originally announced at CiscoLive London, EIGRP has been opened to the community as an IETF Informational Draft “Open EIGRP”, Open EIGRP  provides vendors with technical information on EIGRP and the accumulation of 20 years of development and […]

Programmability and SDN are not the same

Network programmability means democracy, means freedom, freedom to program across all layers and entities, software or hardware – depending on your needs. Is SDN required to have network programmability? Not at all. Does the SDN architecture leverage network programmability? Yes, of course.  So, why do many people equate network programmability and SDN?

What is a “Controller”? And how many do we need?

Thanks to SDN, the “Controller” word pops up in many network architecture discussions these days. In networking alone, we’re already surrounded by many “controllers” and we’re busy introducing more as we speak:  For example, Session Border Controllers or Wireless LAN Controllers have been around for quite some time, and have recently announced the OpenDaylight Controller, […]