Welcome!

Apache Authors: Pat Romanski, Liz McMillan, Elizabeth White, Christopher Harrold, Janakiram MSV

Related Topics: Containers Expo Blog, @CloudExpo, SDN Journal

Containers Expo Blog: Blog Post

Two Options for Web Content Filtering at the Speed of Now | @CloudExpo #SDN #Cloud #Virtualization

To ensure service level and capacity as internet traffic increases, organizations need higher-speed networks

Two Options for Web Content Filtering at the Speed of Now

Because not everything the internet offers is suitable for all users, organizations use web filters to block unwanted content. However, filtering content becomes challenging as networks speeds increase. Two filtering architectures are explored below, along with criteria to help you decide which option is the best fit for your organization.

How Fast Can You Filter?
To ensure service level and capacity as internet traffic increases, organizations need higher-speed networks. In telecom networks, to serve hundreds of thousands of users, 100 Gbps network links are introduced to keep up with the demand. Today, the market has reached a state of maturity regarding solutions for web content filtering at 1 Gbps and 10 Gbps, but filtering at 100 Gbps poses a whole set of new challenges.

To filter content this quickly, the system must expend a huge supply of processing power. Furthermore, there is a need for distribution of traffic across available processing resources. This is usually achieved with hash-based 2-tuple or 5-tuple flow distribution on subscriber IP addresses. In telecom core networks, subscriber IP addresses are carried inside GTP tunnels and, consequently, support for GTP is required for efficient load distribution when filtering traffic in telecom core networks.

Building Filtering Capacity
There are two choices to meet the needs of high-speed filtering by processing resources and providing load distribution. The first option is a stacked, distributed server solution. It is comprised of a high-end load balancer and standard COTS servers equipped with several 10 Gbps standard NICs. The load balancer connects in-line with the 100 Gbps link and load distributes traffic to 10 Gbps ports on the standard servers. The load balancer must support GTP and flow distribution based on subscriber IP addresses.

Because the load balancer cannot guarantee a100 percent even load distribution, there is a need for overcapacity on the distribution side. A reasonable solution comprises 24 x 10 Gbps links. For this solution, three standard servers, each equipped with four 2 x 10 Gbps standard NICs, in total provide the 240 Gbps traffic capacity (3 x 4 x 2 x 10 Gbps). 24 cables for 10 Gbps links round out the solution.

Though the load balancer is costly, the standard COTS servers and standard NICs offset the expense with their reasonable cost. The solution involves many components and complex cabling. Furthermore, the rack space required is relatively large, and system management is complex due to the multi-chassis design.

The second option consolidates load distribution, 100G network connectivity and the total processing power in a single server. This is called a single, consolidated server solution, and it requires a COTS server and two 1 x 100G Smart NICs. Since up to 200 Gbps traffic needs to be processed within the same server system, the server must be equipped with multiple cores for parallel processing. For example, a server with 48 CPU cores can run up to 96 flow processing threads in parallel using hyper-threading.

To fully use CPU cores, the Smart NIC must support load distribution to as many threads as the server system provides. Also, to ensure balanced use of CPU cores, the Smart NIC must support GTP tunneling. The Smart NIC should also support these features at full throughput and full duplex 100 Gbps traffic load, for any packet size.

This single-server solution has multiple benefits. It provides a one-shop system management, where there are no complex dependencies between multiple chassis. The cabling is simple due to single component usage. The footprint in the server rack is very low, thereby reducing rack space hosting expenses.

Determining Factors
The technical specifications for a high-speed web filtering solution are important, but so is the total cost of ownership. Here are some significant parameters for operations expenditure (OPEX) and capital expenditure (CAPEX) calculations. For OPEX, consider rackspace hosting expenses, Warranty and support, and power consumption - including cooling - for servers, NICs and load balancers. CAPEX considerations include the costs of software, servers and Smart NICs or standard NICs.

So, which web content filtering option is right for your organization? It depends on your use case. The difference in costs between the two options will certainly be a determining factor, so consider carefully which method will best serve your needs and those of your customers. If your situation is better served by a simplified, consolidated method, take a closer look at how Smart NICs can provide the support for the speed you need.

More Stories By Sven Olav Lund

Sven Olav Lund is a Senior Product Manager at Napatech and has over 30 years of experience in the IT and Telecom industry. Prior to joining Napatech in 2006, he was a Software Architect for home media gateway products at Triple Play Technologies. From 2002 to 2004 he worked as a Software Architect for mobile phone platforms at Microcell / Flextronics ODM and later at Danish Wireless Design / Infineon AG.

As a Software Engineer, Sven Olav started his career architecting and developing software for various gateway and router products at Intel and Case Technologies. He has an MSc degree in Electrical Engineering from the Danish Technical University.

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


IoT & Smart Cities Stories
CloudEXPO New York 2018, colocated with DXWorldEXPO New York 2018 will be held November 11-13, 2018, in New York City and will bring together Cloud Computing, FinTech and Blockchain, Digital Transformation, Big Data, Internet of Things, DevOps, AI, Machine Learning and WebRTC to one location.
The best way to leverage your Cloud Expo presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering Cloud Expo and @ThingsExpo will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at Cloud Expo. Product announcements during our show provide your company with the most reach through our targeted audiences.
The Internet of Things will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform and how we integrate our thinking to solve complicated problems. In his session at 19th Cloud Expo, Craig Sproule, CEO of Metavine, demonstrated how to move beyond today's coding paradigm and sh...
@DevOpsSummit at Cloud Expo, taking place November 12-13 in New York City, NY, is co-located with 22nd international CloudEXPO | first international DXWorldEXPO and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time t...
What are the new priorities for the connected business? First: businesses need to think differently about the types of connections they will need to make – these span well beyond the traditional app to app into more modern forms of integration including SaaS integrations, mobile integrations, APIs, device integration and Big Data integration. It’s important these are unified together vs. doing them all piecemeal. Second, these types of connections need to be simple to design, adapt and configure...
Cell networks have the advantage of long-range communications, reaching an estimated 90% of the world. But cell networks such as 2G, 3G and LTE consume lots of power and were designed for connecting people. They are not optimized for low- or battery-powered devices or for IoT applications with infrequently transmitted data. Cell IoT modules that support narrow-band IoT and 4G cell networks will enable cell connectivity, device management, and app enablement for low-power wide-area network IoT. B...
Contextual Analytics of various threat data provides a deeper understanding of a given threat and enables identification of unknown threat vectors. In his session at @ThingsExpo, David Dufour, Head of Security Architecture, IoT, Webroot, Inc., discussed how through the use of Big Data analytics and deep data correlation across different threat types, it is possible to gain a better understanding of where, how and to what level of danger a malicious actor poses to an organization, and to determin...
Nicolas Fierro is CEO of MIMIR Blockchain Solutions. He is a programmer, technologist, and operations dev who has worked with Ethereum and blockchain since 2014. His knowledge in blockchain dates to when he performed dev ops services to the Ethereum Foundation as one the privileged few developers to work with the original core team in Switzerland.
Cloud-enabled transformation has evolved from cost saving measure to business innovation strategy -- one that combines the cloud with cognitive capabilities to drive market disruption. Learn how you can achieve the insight and agility you need to gain a competitive advantage. Industry-acclaimed CTO and cloud expert, Shankar Kalyana presents. Only the most exceptional IBMers are appointed with the rare distinction of IBM Fellow, the highest technical honor in the company. Shankar has also receive...
Digital Transformation and Disruption, Amazon Style - What You Can Learn. Chris Kocher is a co-founder of Grey Heron, a management and strategic marketing consulting firm. He has 25+ years in both strategic and hands-on operating experience helping executives and investors build revenues and shareholder value. He has consulted with over 130 companies on innovating with new business models, product strategies and monetization. Chris has held management positions at HP and Symantec in addition to ...