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MegaTrends: New Video Services and Their Potential Impact on Your Network – Part 2

In the first part we discussed how video services are evolving within enterprise networks. Content may be sourced from internal servers, BYOD end points or external content providers, thereby creating a mix of managed and unmanaged services. This has led not only to growth in traffic, but also a competition for actual resources between the different types of services.

We have discussed how these services are evolving, now moving to a per application, per session model which ensures that specific resources are allocated depending on the nature of the usage. Tools such as those provided by the medianet architecture, combined with changes in defaulting all traffic within the VPN session back to the corporate network, contribute to this evolution in session management.

Once again, we turn to Thomas Kernen to provide some insight into how recent technology improvements are designed to help with managing video traffic growth and enabling better content distribution models.

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Nexus 1000V Winning Multiple Awards; VXLAN Scaling with BGP and More on Display at Cisco live!

June 24, 2013 at 4:00 am PST

Cisco Live Orlando EntranceCisco live is here and the news and awards around the Nexus 1000V cloud networking and services platform just keep rolling in. Last week we announced the Citrix NetScaler 1000V virtual application delivery controller, which will be sold by Cisco. The Microsoft Hyper-V version of Nexus 1000V was officially released this month, and just like its VMware vSphere companion, there is a free version users can download and deploy. On the heels of its release the Nexus 1000V for Microsoft Hyper-V won the Best of Show in the virtualization category at Microsoft’s Tech Ed Conference.

Best of InteropAwards just kept piling up for the broader portfolio as Nexus 1000V InterCloud, our secure hybrid cloud connectivity solution, won a Best of Interop award in Tokyo this month. And just to show the marketing team is pulling its weight, a Nexus 1000V InterCloud video won a prestigious Silver Communicator award in the Online video/ B2B category.

There’s lots of new stuff to talk about Cisco live as well. If you recall, in February I discussed enhancements that Cisco was making in the Nexus 1000V portfolio to eliminate the requirement in VXLAN for IP Multicast. [Those enhancements are now shipping in a new Nexus 1000V release 2.2, full code string 4.2(1)SV2(2.1).] This new version even supports virtual switching for up to 128 hosts and 4096 virtual ports for greater scalability.

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Lippis Podcast on All Things Great and New with VXLAN

May 31, 2013 at 1:08 pm PST

Han Yang PodcastThis week Nick Lippis from the Lippis Report sat down with Cisco Nexus 1000V Product Manager, Han Yang, to talk about the latest enhancements and trends with VXLAN, the primary virtual overlay tunneling technology in Cisco Nexus 1000V virtual networks.

In this 15 minute podcast (registration required), Han touches on three key innovations in the VXLAN area: 1) Cisco approaches to eliminating the requirement for IP Multicast by VXLAN (which I earlier blogged about here), 2) the support for virtual services, like virtual firewalls, with vPath (which I blogged about here), and 3) the use and availability of VXLAN gateways to connect virtual workloads to physical workloads in mixed application environments (which I haven’t blogged about yet, but probably should have :-)).

Nick’s podcasts always provide a good perspective on emerging technology trends and he takes complex topics and really helps his listeners get up to speed on the important bits. We always enjoy the chance to work with him. Give it a listen and let us know what you think.

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Cisco VXLAN Innovations Overcoming IP Multicast Challenges

January 29, 2013 at 11:30 pm PST

At Cisco Live! in London this week, Cisco is demonstrating some enhancements to its Nexus 1000V virtual switch that greatly ease some of the challenges in deploying VXLAN in large scale cloud networks. VXLAN was designed to solve the problem of setting up traditional virtual networks (VLANs) in large multi-tenant cloud environments: the limited ID range for VLAN tags was quickly exhausted and a larger ID pool was needed for larger shared infrastructures. VXLAN thus becomes the foundation for a virtual network tunnel or virtual network overlays on top of physical networks. And unlike VLANs, VXLANs are designed to act as L2 virtual networks over L3 physical networks. For a more in-depth refresher on VXLAN, start here.

[Note: Join Cisco for a Live Announcement Webinar on Cloud Innovations on February 5: Register Here]

While VXLANs have certainly enabled a whole new level of scalability for virtual networks, one of the challenges in deploying VXLAN is its use of IP Multicast to implement the L2 over L3 network capability. Why is this? VXLAN is a MAC-in-IP encapsulation protocol in a UDP frame. The virtual switch that acts as the VXLAN termination (in Cisco’s case, the Nexus 1000V virtual switch) takes the L2 packet from the VM, wraps it in a L3 IP header, and sends it out over UDP. But the challenge is that there’s no way to determine which IP address should be used for the destination host (VXLAN termination point) at which the desired MAC address can be found. In other protocols, this can be accomplished within the network control plane and some MAC to IP mapping protocol, but the VXLAN specification indicates there should be no reliance on a control plane or a physical to virtual mapping table.

VXLAN frame

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