Early last November, we published a blog that took a close look at enterprise application requirements to provide a high-level menu of where they might reside in terms of a private or public cloud.
Here, we’ll explore:
Prerequisites for Hybrid Cloud Connectivity
Hybrid cloud connectivity attributes can be defined both in terms of the underlying infrastructure and the automation system.
In terms of network connectivity, the requirements depend on the application, but the key attributes are:
All of this can be controlled through the use of visibility services at Layers 2-4. Nearly all applications can be handled at this level:
When tuned to the proper degree to match your own requirements with those of your provider, you can be sure to have your service level agreements (SLA) met.
You can also ask your providers whether they have an automation system to be able to handle these requirements at scale; this system should be able to evolve into one that includes:
The simplest (most primitive) option is just to connect over the Internet via a network service provider to the CSP. This has the following pros and cons:
So this option may not be ideal for applications that require a decent SLA.
An intermediate choice is to request a Point of Presence (PoP) for enterprises and CSPs within the Colo. This brings with it some new advantages:
Probably the most flexible option is to remove the requirement to connect over the SP network and house the enterprise DC in the Colo facility (Figure 1).
Figure 1: Enterprise DC Housed in the Colo for Maximum Flexibility
Of course, this isn’t always possible, and many enterprises will keep much of their infrastructure on premises, but when achievable it has the advantage of supporting very sophisticated services.
Potential Service Offerings
Figure 2 shows a high level overview of the ways you can connect for either hybrid or multi cloud capabilities.
Figure 2: High Level Service Categories
These categories can be described as follows:
The latter two options providing the most flexibility and performance.
The final category is more forward-looking, and requires an advanced automation platform to be able to perform cross-cloud orchestration. Even before the full bloom of this vision is realized, elements of solutions in this area can be deployed in an incremental fashion even today.
Optimizing Customer Experience
The options for cloud exchange and intercloud service orchestration provide ways to optimize your experience as a Colo tenant; similarly, CSPs, and at times even network service providers, may house equipment in the Colo.
For you, the enterprise tenant, the advantages are:
Interestingly, CSP tenants also reap benefits:
These advantages can be ensured by using architectures to support scale and performance. This should include an underlay to offer custom connections (at variable speeds for physical or logical interfaces) for selected cloud services, and perhaps even Bandwidth on Demand (BoD) from a customer portal.
Finally, if you are running MPLS or VPLS today, then using technology that can help you migrate to BGP-EVPN with VXLAN, especially while coexisting with your existing underlay, will allow you to scale and perform in conjunction with the needs of your customers.
For more information, follow the links in this article or contact your Extreme representative.