PF_RING is a great open-source project that enables extremely fast packet processing on x86 servers, so I was more than delighted when Paolo Lucente of the pmacct fame introduced me to Luca Deri, the author of PF_RING.
When we started chatting, we couldn’t resist mentioning ntopng, another open-source project Luca is working on.
Read more ...Introduction
Multicast is a great technology that although it provides great benefits, is seldomly deployed. It’s a lot like IPv6 in that regard. Service providers or enterprises that run MPLS and want to provide multicast services have not been able to use MPLS to provide multicast Multicast has then typically been delivered by using Draft Rosen which is a mGRE technology to provide multicast. This post starts with a brief overview of Draft Rosen.
Draft Rosen
Draft Rosen uses GRE as an overlay protocol. That means that all multicast packets will be encapsulated inside GRE. A virtual LAN is emulated by having all PE routers in the VPN join a multicast group. This is known as the default Multicast Distribution Tree (MDT). The default MDT is used for PIM hello’s and other PIM signaling but also for data traffic. If the source sends a lot of traffic it is inefficient to use the default MDT and a data MDT can be created. The data MDT will only include PE’s that have receivers for the group in use.
Draft Rosen is fairly simple to deploy and works well but it has a few drawbacks. Let’s take a look at these:
Rob Sherwood, CTO, Big Switch Networks, discusses the state of open networking with Ethan and Greg. We cover trends in hyper scale networking, the state of SDN's evolution, hardware/software disaggregation, and integrating SDN underlays & overlays. For example, we discuss how Big Cloud Fabric ties into VMware.
The post Show 232 – Big Switch Networks on the State of Open Networking – Sponsored appeared first on Packet Pushers Podcast and was written by Ethan Banks.
Citrix's restructuring takes a toll; Extreme's customers postpone some orders.
This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach.
Companies adopting cloud technologies often end up with a public/private hybrid approach that balances business needs with infrastructure goals, and while the end result provides numerous benefits, hybrid clouds can result in integration challenges. But with the right planning and the strategies below, connecting cloud applications can be done easily and effectively:
Surprisingly, not all APIs offer full create, read, update and delete (CRUD) operations on all of their entities, often exposing just a subset of the full data model. Always be sure to know what data entities are available and what operations you can perform on them before committing to any hybrid integration project, even when the API exposes the entity you are looking for and the operation you want.
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