Emerging Use Cases for SDN
Hey all -- I took last week off from blogging... sorry about that! I am publishing a new white paper in two parts. I knowCorrelating Overlay and Underlay SDN Performance
Correlating Overlay and Underlay SDN Performance
by Steve Harriman, VP of Marketing - February 24, 2015
Next month Packet Design CTO Cengiz Alaettinoglu will address the MPLS SDN World Congress in Paris about the need for SDN analytics to monitor and correlate the performance of overlay and underlay networks. Below is a summary of his presentation, which will take place on Thursday, March 19 at 4:45 p.m. at the Marriott Paris Rive Gauche Hotel & Conference Center. (If you are attending the conference, please visit us in booth #401. In addition, Packet Design customers are invited to our first ever Customer Symposium being held on Monday, March 16 at the Rive Gauche Hotel. For more information or to register for this free event, visit http://ssp.packetdesign.com/2-uncategorised/288-paris-customer-symposium).
The Role of Analytics-Based Orchestration in Overlay and Underlay Networks
Industry focus on software defined networking (SDN) has been in three segments: the data center, the enterprise-WAN edge, and the WAN itself. Certain services and applications will require orchestration across these segments. For example, when data center compute resources become unavailable, some virtual machines (VMs) will need to be moved to other data centers. External traffic to these VMs, Continue reading
Welcome CCNA Collaboration, Goodbye CCNA Voice & CCNA Video!
Well folks, it has finally been announced! Cisco has retired the CCNA Voice and CCNA Video certifications in favor of a new, all-encompassing CCNA Collaboration certification. It will be comprised of two separate exams—one with a focus on Unified Communications solutions and one emphasizing the implementation and troubleshooting of video infrastructures.
The first exam is called “Implementing Cisco Collaboration Devices” and corresponds to exam number 210-060 CICD. Topics to note within this exam will be call signaling and media flows, VoIP quality implications, user account creation and modification, calling privileges, IM and Presence, RTMT and CDR/CMR-based reporting, and typical end user support scenarios. The focus of this exam is now on becoming a well-rounded engineer, with knowledge in more than just CUCM. For more information, visit this link here.
The second exam is called “Implementing Cisco Video Network Devices” and corresponds to exam number 210-065 CIVND. Topics on this exam that should carry great importance will be streaming video, media convergence, desktop and immersive systems, troubleshooting methodologies, media quality, and multi-point control units. With the focus here being solely on video and its integration with voice networks, candidates for the exam will gain a breadth of knowledge during the studying Continue reading
The two types of people that go to Cisco Live.
With Cisco Live US ( #CLUS ) 2015 slowly approaching, It’s becoming a popular topic and the question comes up, “Do you think it’s worth going to CLUS?” Like most questions I answer I start with “Well, it kind of depends what you are going for”, CLUS is a big event and there is plenty […]
OSPF as a PE-CE Routing Protocol
OSPF as a PE-CE routing protocol can be used in the MPLS Layer 3 VPN design between customer and the service provider. If the customer receives an MPLS Layer 3 VPN service , routing protocol is enabled between the customers and the Service Providers. Don’t forget that static routing is a routing protocol ! This VPN… Read More »
The post OSPF as a PE-CE Routing Protocol appeared first on Network Design and Architecture.
TLS Session Resumption: Full-speed and Secure
At CloudFlare, making web sites faster and safer at scale is always a driving force for innovation. We introduced “Universal SSL” to dramatically increase the size of the encrypted web. In order for that to happen we knew we needed to efficiently handle large volumes of HTTPS traffic, and give end users the fastest possible performance.
CC BY 2.0 image by ecos systems
In this article, I’ll explain how we added speed to Universal SSL with session resumptions across multiple hosts, and explain the design decisions we made in this process. Currently, we use two standardized session resumption mechanisms that require two different data sharing designs: Session IDs RFC 5246, and Session Tickets RFC 5077.
Session ID Resumption
Resuming an encrypted session through a session ID means that the server keeps track of recent negotiated sessions using unique session IDs. This is done so that when a client reconnects to a server with a session ID, the server can quickly look up the session keys and resume the encrypted communication.
At each of CloudFlare’s PoPs (Point of Presence) there are multiple hosts handling HTTPS traffic. When the client attempts to resume a TLS connection with a Continue reading
Cumulus Networks Could Be The New Microsoft
When I was at HP Discover last December, I noticed a few people running around wearing Cumulus Networks shirts. That had me a bit curious, as Cumulus isn’t usually on the best of terms with traditional networking vendors unless they have a partnership. After some digging, I found out that HP would be announcing a “britebox” branded whitebox switch soon running Cumulus Linux. I wrote a post vaguely hinting about this in as much detail as I dared leak out.
No surprise that HP has formally announced their partnership with Cumulus. This is a great win for HP in the long run, as it gives customers the option to work with an up-and-coming network operating system (NOS) along side HP support and hardware. Note that the article mentions a hardware manufacturing deal with Accton, but I wouldn’t at all be surprised to learn that Accton had been making a large portion of their switching line already. Just a different sticker on this box.
Written Once, Runs Everywhere
The real winner here is Cumulus. They have partnered with Dell and HP to bring their NOS to some very popular traditional network vendor hardware. Given that they continue to push Cumulus Linux Continue reading
Let’s Get Rid of the Thick Yellow Cable
Whenever I write about the crazy things vendors are trying to sell us, and the kludges we have to live with, I keep wondering, “Is it just me, or is the whole industry really as ridiculous as it seems?” It’s so nice to see someone else coming to the same conclusions, like Mark Burgess (the author of CFEngine and the Promise Theory) did in a lengthy essay on whether SDN makes sense.
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