Successfully reported this slideshow.

Dec2012 evolution final


Published on

  • Be the first to comment

  • Be the first to like this

Dec2012 evolution final

  2. 2. EDITOR’S DESK It’s Not Too Early To Worry About 40 and 100 GbE Migration HOME A FEW YEARS ago, a group of network new equipment as vendors race engineers laughed in my face when to release 40 and 100 GbE-ready EDITOR’S DESK I brought up an article I was writ- switching. It will also require consid- ing about 10 GbE migration. All of eration of new cabling and optics. them were still using 1 GbE, and But the challenges don’t stop LET THE 40GIGABIT ETHERNET only a few were even testing 10 GbE there. Existing monitoring, trouble-MIGRATION BEGIN switches. The transition, they said, shooting and management tools would be long and slow. It was the aren’t ready to scale to new ultra- classic gap between a user’s reality fast Ethernet networks, reports ULTRA-FAST ETHERNET AND and a journalist’s research. contributor Jim Frey in his featureTHE MONITORING So it may seem even stranger “The 100 Gigabit Ethernet manage- CHALLENGE this month that we have produced ment challenge.” The same problem an entire issue of Network Evolution exists in scaling firewalls and intru- about 40 and 100 GbE migration sion detection devices for 40 GbE 400 GIGABIT ETHERNET IN (we even have a piece pondering networks. While vendors are work-THE ENTERPRISE … the future of 400 and Terabit GbE). ing to upgrade monitoring and secu- REALLY? After all, we are only at the very rity appliances, engineers testing or beginning of widespread 10 GbE newly implementing 40 GbE find implementation. themselves patching the problem But things are different now than by load balancing traffic across mul- they were a few years ago. The need tiple 10 GbE-ready monitoring and for capacity and speed is explod- security devices. ing as network teams build private The purpose of this issue isn’t to and hybrid clouds and deliver video urge readers to invest in 40 and 100 throughout their campuses and GbE. Instead, it’s to be sure that you branch offices. So even if they don’t are aware of the challenges that lie need 40 GbE today, they’ll need to ahead so that when you invest in build networks that can be transi- your current 10 GbE infrastructure, tioned in the future. And that won’t you do so with future migration to be easy, as Shamus McGillicuddy 40 and 100 GbE in mind. n reports in his feature “40 Gigabit Ethernet: The migration begins.” Rivka Gewirtz Little The transition will mean testing Executive Editor NETWORK EVOLUTION E-ZINE • DECEMBER 2012   2
  3. 3. COVER STORY 40 GIGABIT ETHERNET: THE MIGRATION BEGINS HOME EDITOR’S DESK Experts and early adopters of 40 Gigabit Ethernet share successes and pitfalls. BY SHAMUS MCGILLICUDDY LET THE 40GIGABIT ETHERNETMIGRATION BEGIN THE NEED FOR more speed and capac- for 40 GbE and beyond. Research ULTRA-FAST ETHERNET AND ity never goes away. Most enter- from the Dell’Oro Group forecastsTHE MONITORING prises are still rolling out 10 Gigabit the overall Layer 2 and Layer 3 Eth- CHALLENGE Ethernet links in their networks, ernet switch market will reach $25 but already network architects and billion in 2016, with 40 and 100 engineers are preparing for the GbE technology approaching $3 bil- 400 GIGABIT ETHERNET IN future because data traffic never stops growing. Early adopters are Infonetics ResearchTHE ENTERPRISE … REALLY? testing and deploying the first generation of 40 Gigabit Ethernet shows sales of 40 GbE technology sales grew (GbE) switches and routers to get a step ahead of this continuous onslaught of traffic. 50% in both Q1 and “We are seeing incidental peaks of traffic nearing 10 Gbps,” said Q2 of this year. Jeroen van Ingen, a network engi- neer at the University of Twente in lion in sales. Meanwhile, Infonetics the Dutch city of Enschede. “Given Research shows sales of 40 GbE the traffic growth over the years, we technology sales grew 50% in both expect to need more capacity within Q1 and Q2 of this year. The expan- 12 to 24 months. That’s why we sion is largely driven by bigger data decided that new core equipment centers and the move to the cloud, should support 40 GbE.” according to researchers. University of Twente’s van Ingen The university recently upgraded is not alone in predicting the need the core of the residential portion NETWORK EVOLUTION E-ZINE • DECEMBER 2012   3
  4. 4. MIGRATING TO 40 GBE of its campus network with two 6500 Supervisor Engine 2T. “The of Cisco Systems’ new Catalyst first and most obvious place that I 6500-E switches. Today, those core suspect a lot of people will initially switches are interconnected with install 40 gigabit is in their QA multiple 10 GbE links, but traffic is [quality assurance] and lab environ- HOME spiking upward and the university ments,” he said. “It’s more conve- will need 40 GbE interconnections soon. Van Ingen is testing a 40 GbE EDITOR’S DESK interconnect between the two Cata- “If the links actually lyst 6500s and plans to put two 40 get saturated before we upgrade, the GbE interconnections into produc- LET THE 40 tion soon. increased packetGIGABIT ETHERNETMIGRATION BEGIN The demand for this bandwidth is driven by three factors: The uni- versity is increasing its use of cloud loss will lead to error ULTRA-FAST services and cloud storage, video messages in their applications.” ETHERNET ANDTHE MONITORING traffic to the student dormitories is CHALLENGE growing, and various open source —JEROEN VAN INGEN, projects that are mirrored on the network engi­neer, University of Twente university’s campus are extremely 400 GIGABIT ETHERNET IN popular.THE ENTERPRISE … “If we don’t keep up with nient to have testing tools and load REALLY? upgrades, the network experience generation tools and interconnects will get worse and worse,” van that are single links of large capac- Ingen said. “If the links actually get ity, as opposed to many aggregated saturated before we upgrade, the links.” increased packet loss will lead to Verisign will soon have to replace error messages in their applications, aggregated 10 GbE links with 40 actions that can’t be completed and GbE links, particularly to network lost productivity in general.” service devices like load balancers Verisign Inc., the Reston, Va.- and firewalls. Today, GbE-capable based Internet infrastructure pro- load balancers and firewall appli- vider, which manages two of the ances are scarce on the market, Internet’s 13 root servers, will likely but the migration will happen. “As transition to 40 GbE within two capacity for our infrastructure has years, according to Mike Gibbs, to grow, as DNS grows, as our Verisign’s network architect. Gibbs denial-of-service product grows, and his team beta-tested the 40 we’re going to need greater capacity GbE capabilities on Cisco’s Catalyst between devices,” Gibbs said. NETWORK EVOLUTION E-ZINE • DECEMBER 2012   4
  5. 5. MIGRATING TO 40 GBE 40 GIGABIT ETHERNET: “With 40 Gigabit Ethernet you WHEN LINK AGGREGATION get guaranteed and dedicated IS NO LONGER SUFFICIENT 40-gigabit bandwidth, so hashing Link aggregation has been an essen- algorithms don’t play a part any- tial tool for network engineers for more,” Dasgupta said. “[When] HOME years, whether aggregating multiple predictability is their business, Gigabit Ethernet links or 10 GbE [networking pros] are moving to 40 links. There always comes a time gigabit. They can’t take a chance on EDITOR’S DESK when aggregation is no longer prac- hashing algorithms playing a part in tical, however, and a migration to how long transactions take.” the next generation of Ethernet is LET THE 40GIGABIT ETHERNET necessary. Enterprises whose busi-MIGRATION BEGIN nesses are based on network per- TRANSITIONING TO formance and reliability will reach a 40 GIGABIT ETHERNET point where link aggregation breaks As is the case with every next-gen- ULTRA-FAST ETHERNET AND down, and they will have no choice eration Ethernet standard, the tran-THE MONITORING but to upgrade to 40 GbE. sition from 10 GbE to 40 GbE will CHALLENGE “There’s a limit to how many not be disruptive, Dasgupta said. single 10-gigabit links we’ll be able From a protocol standpoint, TCP, to wrap together into an aggregate UDP and Layer 2 and Layer 3 proto- 400 GIGABIT ETHERNET IN link,” Gibbs said. “With link aggre- cols remain unchanged.THE ENTERPRISE … gation, you have a hashing mecha- “The things that need to change REALLY? nism to send traffic across them as are the cabling and the optics at equally as possible. Not every ven- both ends,” he said. dor does that equally well. Because Specifically, enterprises will of that, when you start having ven- need to deploy new fiber—OM3 or dors interoperate with each other, OM4—for link lengths of up to 100 you can’t guarantee an equal spread meters and duplex single-mode across all those links. So, a single fiber (SMF) for links up to 10 kilo- 40-gigabit link ends up being much meters. Of course, new transceivers more preferred.” will also become necessary, wheth- Link aggregation is based on er SR4 or LR4. the IEEE 802.1ax standard, but the Many enterprises are already hashing algorithms each vendor thinking about the path to 40 GbE uses to load balance traffic across as they install 10 GbE today, and are multiple links is unique, according to rolling out ribbon fiber that can sup- Dhritiman Dasgupta, senior direc- port the higher bandwidth. tor of product marketing at Juniper While many enterprises install Networks. 40 GbE-ready infrastructure dur- NETWORK EVOLUTION E-ZINE • DECEMBER 2012   5
  6. 6. MIGRATING TO 40 GBE ing a 10 GbE upgrade to save time terminate [the fiber], it takes a lot of and money, those savings will only money.” happen if the networking team The migration to 40 GbE is even maintains the cabling plant prop- more sensitive to poorly maintained erly. Signal loss tolerance for a 40 fiber. Enterprises need to inspect HOME GbE network is extremely low in and clean the end faces on those comparison to Gigabit Ethernet and fiber links because the next genera- 10 GbE, and it can be challenging to tion of Ethernet will have a much EDITOR’S DESK achieve an acceptable rate of loss. lower loss budget. “People will connect fiber up and “We hear more and more that as never have cleaned it and never these speeds go up, systems are not LET THE 40GIGABIT ETHERNET inspected it,” said Ed Gastle, prod- coming up at all or are coming upMIGRATION BEGIN uct line manager for JDS Uniphase and having problems,” Gastle said. Corp. (JDSU), a Milpitas, Calif.- “Then we start to troubleshoot and based optical test and measure- we find that the problem is caused ULTRA-FAST ETHERNET AND ment company. “The [40 GbE] links by a poorly maintained end face.THE MONITORING will come up and they will work, but They’ve been connected up so many CHALLENGE you’ll be taking errors because your times that dirt and debris has been data is getting corrupted.” ground into it and you … have to re- Poor fiber maintenance became terminate that fiber.” 400 GIGABIT ETHERNET IN an issue during Interop Las Vegas Connecting dirty fiber to activeTHE ENTERPRISE … in 2011, he added. JDSU provided equipment can also spread damage, REALLY? the testing and measurement for he said. Anything short of pristine InteropNet that year. That year, the fiber can pose a risk of damage to InteropNet network upgraded from the optics, for instance. Gigabit Ethernet to 10 GbE. “They had a whole bunch of fiber out, but they hadn’t treated it very SECURING AND MONITORING well,” he said. “They hadn’t been 40 GIGABIT ETHERNET LINKS cleaning and inspecting it. And now As network engineers deploy 40 they were trying to run 10 giga- GbE switches and routers, eventual- bit. Well, guess what? It doesn’t ly they’ll need Layer 4-7 appliances, work. Now you have to go through such as application delivery control- a recovery effort to get your end lers, firewalls or WAN optimization faces to good enough loss [levels] controllers, that can handle 40 GbE to support 10 gigabit. We were able traffic. They also need evaluate how to get a few of them back by aggres- these devices monitor the network, sively cleaning them, but it takes a whether it is for security or perfor- lot of time. And if you have to re- mance. NETWORK EVOLUTION E-ZINE • DECEMBER 2012   6
  7. 7. MIGRATING TO 40 GBE “It’s not the link speed that you tools, including multiple intrusion have to be concerned about,” said detection appliances like Source- Verisign’s Gibbs, who is evaluating Fire’s Real-time Network Aware- 40 Gbps firewalls. “It’s whether or ness tool. not the systems can actually do the processing of the traffic between Many organizations HOME them, especially firewalls, where every packet is going to be at least will rely on NetFlow EDITOR’S DESK briefly reviewed at a minimum of and SNMP for network Layer 3, if not Layer 4, all the way up to Layer 7. That takes a huge visibility because line- LET THE 40GIGABIT ETHERNET amount of computational power.” rate packet analysisMIGRATION BEGIN Some organizations will want line will remain a chal­ enge. l rate visibility right at the 40 GbE link. The University of Texas at Aus- ULTRA-FAST ETHERNET AND tin has deployed high-availability Still, early adopters will have toTHE MONITORING (HA) pairs of Cisco Nexus 7000s deal with limitations of existing CHALLENGE switches in two data centers, with technology. Many organizations 40 GbE interlinks between the HA will rely on NetFlow and SNMP for pairs and between the data centers, network visibility because line-rate 400 GIGABIT ETHERNET IN according to Brent Boggan, regional packet analysis will remain a chal-THE ENTERPRISE … sales manager at Ixia, a network lenge. REALLY? monitoring vendor based in Cala- The University of Twente will use basas, Calif., which has helped the open source SNMP counters and school instrument the network for NetFlow analyzers to maintain vis- visibility. ibility on its 40 GbE links, van Ingen Boggan said the university has said. For packet visibility, he per- 40 GbE links in each of two Austin forms full packet captures on the 10 data centers. Ixia put a physical, GbE links that are aggregated by the passive optical 40 Gbps tap on each Catalyst 6500. of those connections. The monitor- “If we really need to do full packet ing ports coming out of those taps analysis on a 40 Gbps link, we’ll then flow into a network monitoring probably configure a high-end serv- switch, the Anue Net Tool Optimiz- er with a multiport 10 GbE card and er (NTO) 5288, which can process see how far that gets us,” he said. up to 40 Gbps of data at full duplex. Verisign relies on NetFlow and The NTO 5288 then filters, rep- SNMP to monitor its 10 GbE net- licates and load balances that 40 work today and will probably con- Gbps flow across multiple 10 Gbps tinue that approach as it migrates to NETWORK EVOLUTION E-ZINE • DECEMBER 2012   7
  8. 8. MIGRATING TO 40 GBE 40 GbE, Gibbs said. with, but it is the side effect of more But the process is imperfect, bandwidth and more speed.” Gibbs acknowledged. Some events Mitigating that risk involves a will always slip through. These pro- multi-tiered solution for monitoring tocols won’t always reveal bursts of and security, Gibbs said. Network HOME traffic going up and down. On the engineers need to continue watch- security side, something malicious ing what’s going on in NetFlow and can slip through very easily. other sampling technologies, but EDITOR’S DESK “You’re looking at patterns to then have another tier of defense figure things out instead of looking with inspection devices down- for something inside of a packet,” stream in the network. LET THE 40GIGABIT ETHERNET he said. “It also means any [probing “Don’t just look at these [core]MIGRATION BEGIN attack] with a single or couple of routers,” he said. “If you miss it at packets you might miss because it’s the core routers, you should catch outside of your sampling point. It’s it in a net further down in the ULTRA-FAST ETHERNET AND a known risk everyone has to deal chain.”nTHE MONITORING CHALLENGE 400 GIGABIT ETHERNET INTHE ENTERPRISE … REALLY? NETWORK EVOLUTION E-ZINE • DECEMBER 2012   8
  9. 9. DO 100 GBE MANAGEMENT AND MONITORING TOOLS EXIST? DO 100 GBE MANAGEMENT AND MONITORING HOME TOOLS EXIST? EDITOR’S DESK Vendors are racing to release 100 GbE switching, but LET THE 40GIGABIT ETHERNETMIGRATION BEGIN network monitoring tools may not be able to keep pace. BY JIM FREY ULTRA-FAST ETHERNET ANDTHE MONITORING CHALLENGE IT MAY BE early days for 100 Gigabit The difficulty of monitoring 100 Ethernet, but many service provid- GbE networks varies depending on ers have deployed the technology, the type of network management 400 GIGABIT ETHERNET IN and now a small but growing num- tool or strategy. Some networkTHE ENTERPRISE … ber of enterprises are proceeding management strategies lend them- REALLY? with it as well. As soon as 100 GbE selves more easily to adapting to is in live production, network and ultra-high speed networks, while security pros will need to manage others must be heavily transformed. and monitor these networks. Herein The following is an assessment of lies the challenge—some manage- existing network management strat- ment tools are ready for this next egies and whether they’re ready to level of ultra-speed, but some clear- handle 100 GbE networks. ly are not. Of 15 network management and n Fault/availability management: monitoring vendors contacted for Since 100 GbE is delivered via net- recent research, very few had con- work devices, the first objective is to crete products in place or even a make sure that tools for the network near-term roadmap. Yet most are operations center (NOC) are ready aware of the emerging need for 100 to discover and recognize these GbE monitoring and management devices. That will mean recogniz- and are exploring how to accommo- ing the new interfaces they employ, date customers. their topology placement, and their NETWORK EVOLUTION E-ZINE • DECEMBER 2012   9
  10. 10. DO 100 GBE MANAGEMENT AND MONITORING TOOLS EXIST? ongoing health. These basic capa- flow record volumes beyond a tool’s bilities are already present in most capacity to collect and analyze. fault/availability monitoring plat- Again, that’s not likely to occur in forms today, particularly among the near term, as flow-based tools products that have been deployed designed for today’s enterprise or HOME in service provider environments service provider environments are (i.e. ISPs, mobile operators, hosting already equipped to handle very providers) where 100G is already in high volumes of flow record data. EDITOR’S DESK place today. These tools may need to be scaled down for an enterprise n Packet-based security and perfor- network environment. mance management: Here’s where LET THE 40GIGABIT ETHERNET we run into a major problem. PacketMIGRATION BEGIN n Statistics-based performance inspection tools are the heavy lift- management: Things get a bit stick- ers of the management tools sector, ier when you look at performance and they face the greatest technical ULTRA-FAST ETHERNET AND management platforms that gather challenge when trying to accom-THE MONITORING statistics by regular polling of net- modate increased network speeds. CHALLENGE work devices. While many metrics There are a few essential parts to will not be directly affected, traffic this challenge—getting to the pack- polling counters may be insufficient ets, distributing the packets for 400 GIGABIT ETHERNET IN for tracking total volume of activity analysis, and analyzing the packets.THE ENTERPRISE … unless those counters are harvested There are no packet analysis tools REALLY? on a much more rapid basis than available today that can directly polling engines are typically con- support 40 GbE, let alone 100 GbE, figured to support. This will not be at full line rates. Many have certified a problem in the early days of 100 full 10 GbE support and a few offer GbE, as total traffic volumes will ini- 40 GbE interfaces, but none have tially be far less than total capacity, addressed 100 GbE at this time. but eventually these tools will need to scale. SCALING PACKET INSPECTION TOOLS n Flow-based security and perfor- TO MEET 100 GBE NETWORKS mance management: Tools that use The only viable approach to 100 technologies such as NetFlow or GbE network management today is IPv6 to gather data regarding com- adapt existing tools that are today position volume of traffic should only rated to 10 GbE. This requires a be essentially agnostic to 100 GbE, two-part process. and will be stressed only if traffic The first step is gathering packets volumes rise to a level that results in at 100 GbE. There are currently two NETWORK EVOLUTION E-ZINE • DECEMBER 2012   10
  11. 11. DO 100 GBE MANAGEMENT AND MONITORING TOOLS EXIST? techniques primarily used for gath- packets at 100G. This is the job ering packets for analysis – TAP and of network monitoring switches SPAN (a.k.a. port mirroring.) SPAN (a.k.a. network packet brokers), is a function of the network device which adapt traffic from 100 GbE itself, but taps must be upgraded interfaces over to 10 GbE interfaces HOME to support 100 GbE. The good to manage the torrent of packets news here is that taps are already via load balancing, slicing, filtering, available for 100 GbE. NetOptics etc. The idea is to prevent analy- EDITOR’S DESK released the 100G Flex Tap back in sis tools from being overwhelmed. September, and the company claims While 100 GbE is on the roadmap deployments are already underway of some vendors (some say they’ll LET THE 40GIGABIT ETHERNET in mobile telco, ISP and hosting have product in early 2013), EndaceMIGRATION BEGIN provider shops. ONPATH (which is was the first to productize and ship being acquired by NetScout) is also a solution. The EndaceAccess 100 shipping 100G-rated, Layer 1 access provides L1 adaptation and load ULTRA-FAST ETHERNET AND devices in the form of Optical Blade balancing so that 10G-rated packetTHE MONITORING for its 3900 switch family, mostly analysis tools can be deployed to CHALLENGE to testing environments. Other L1 monitor 100 GbE links. The solution vendors have this on their roadmaps, is deployed and being used in pro- so expect more options coming in duction by Endace customers today. 400 GIGABIT ETHERNET IN 2013. Other vendors are working on 100THE ENTERPRISE … The second element of deep GbE network monitoring switching REALLY? packet inspection is distributing as well. For example, on Novem- ber 1, 2012, Gigamon announced it would be demonstrating 100G aggregation and connections later in the month. Expect to see others MORE ON NETWORK making announcements late this MONITORING TOOLS year and early next. n Deep packet inspection tools: For many, 100 GbE is far off in Proxy vs. stream-based the future, so there is no immediate n Cloud monitoring tools: need to worry about how to man- Using Wireshark in the cloud age it. But for those at this bleeding edge, core fault/availability tools n Network diagnostics that see through virtualization are ready now, and recent introduc- tions by companies such as NetOp- n Network performance tics, ONPATH, and Endace, place testing for a 40 GbE upgrade packet-based security and perfor- mance monitoring within reach. n NETWORK EVOLUTION E-ZINE • DECEMBER 2012   11
  12. 12. WILL WE EVER NEED 400 GIGABIT ETHERNET ENTERPRISE NETWORKS? WILL WE EVER NEED 400 GIGABIT ETHERNET ENTER- HOME PRISE NETWORKS? EDITOR’S DESK LET THE 40GIGABIT ETHERNET With 40 and 100 Gigabit Ethernet so new, what couldMIGRATION BEGIN possibly drive the need for 400 Gigabit Ethernet in the enterprise? Hint: It’s not just the WAN. BY TOM NOLLE ULTRA-FAST ETHERNET ANDTHE MONITORING CHALLENGE THOUGH 10 GIGABIT ETHERNET (GbE) is storage interface standards define just at the beginning of widespread transfer rates well below 100 GbE, uptake, there’s already plenty of talk so that won’t cause demand. But 400 GIGABIT ETHERNET IN in the market about the need for 40 since the edge of the network isTHE ENTERPRISE … and 100 GbE in the enterprise. In getting faster, it would be sensible REALLY? the middle of all this, do we need to to assume that this higher edge consider the potential for 400 Giga- traffic would force up speeds in the bit Ethernet in the WAN and LAN? metro/core aggregation network as The answer is, plainly, yes. well. The IEEE has just formed a work- Modern networks, whether they ing group to determine whether span the globe or only the data there will be need for 400 GbE center, are built on a hierarchy of or Terabit Ethernet development. devices, with “deeper” switches or But we are already some looming routers networking the edge devices use cases—even in the enterprise together for full connectivity. This LAN—that will drive the need for has encouraged the use of succes- 400 Gigabit Ethernet. sively faster trunks as port speeds In general, high-speed standards have increased. The trend makes it like 400 GbE or even Terabit Eth- logical to assume that future LAN ernet are applied deeper in the switches or WAN switch/routers network where traffic has been will need 400 GbE or faster. More aggregated. For now, computer and traffic, more capacity. But traffic NETWORK EVOLUTION E-ZINE • DECEMBER 2012   12
  13. 13. WILL WE EVER NEED 400 GIGABIT ETHERNET ENTERPRISE NETWORKS? doesn’t impact the WAN or LAN there’s less pressure on Ethernet uniformly—and therefore the needs performance. may be vastly different in the two It’s likely that there will be greater network types. need for faster Ethernet interfaces on optical switches and optical HOME point-to-point paths in metro net- IN THE WAN, THINK FASTER working. Almost all traffic in a metro ETHERNET FOR OPTICAL SWITCHING network goes one place—the metro EDITOR’S DESK In the WAN, the largest source of concentration point, where it’s con- additional traffic in the future net- nected to a cache, a data center or work will likely be content. That the core network. Ethernet routing LET THE 40GIGABIT ETHERNET content is increasingly cached in a or switching based on destinationMIGRATION BEGIN content delivery networks (CDNs) address is hardly useful when all the or in content farms in each metro traffic is headed in the same direction. area. This means that while the Even when traffic does reach the ULTRA-FAST ETHERNET AND growth of access bandwidth is likely core, which would be the case forTHE MONITORING to continue, and this increased edge business traffic and especially video CHALLENGE capacity will demand greater capac- conferencing, that traffic may not ity in the metro area for aggrega- drive the kind of changes everyone tion, the majority of content traffic expects at the equipment level. 400 GIGABIT ETHERNET IN will stop in the metro cache and Operators have been looking forTHE ENTERPRISE … never reach the core at all. In that alternatives to adding more lay- REALLY? case, within a metro there’s less ers of switch/router aggregation, traffic to aggregate, which means including the optical transport net- work (OTN) or the routerless core. In both of these alternative network architectures, metro areas are con- MORE ON NEXT-GENERATION nected to each other in a mesh ETHERNET rather than to deeper-level electri- cal devices like routers (hence the n IEEE explores new standards term routerless). Because traffic is for ultra-fast Ethernet limited to each metro area partner, n 40 Gigabit Ethernet in the it’s less likely this connection would data center: Migration best demand a radical increase in Eth- practices ernet speeds. However, even when n Research institute deploys traffic growth does drive faster Eth- 100 Gigabit Ethernet from ernet interfaces, they’re again more core to closet likely to be used on optical devices than on Ethernet switches or routers. NETWORK EVOLUTION E-ZINE • DECEMBER 2012   13
  14. 14. WILL WE EVER NEED 400 GIGABIT ETHERNET ENTERPRISE NETWORKS? SURPRISE, SURPRISE: 400 GIGABIT ernet. But when clouds are created ETHERNET NEEDED FOR THE LAN by linking multiple data centers over In the LAN, it’s harder to discard the fiber, a super-Ethernet connection is notion that uniform connectivity is almost inevitable. needed. Cloud computing encour- Faster Ethernet will HOME ages the creation of dense, highly connected, data centers. Cloud applications are often more compo- connect cloud data cen- ters and will sup­port EDITOR’S DESK nentized and horizontally integrated than traditional applications, which makes traditional multi-tiered LAN optical metro aggrega- tion and OTN-based LET THE 40GIGABIT ETHERNET switching performance more prob- lematic. In a cloud data center, even cloud core networks.MIGRATION BEGIN 10 GbE server/storage interfaces connected in a four- or five-layer ULTRA-FAST ETHERNET AND structure might drive switch inter- The bottom line is that we needTHE MONITORING face speeds to 400 GbE or more in faster Ethernet. Faster Ethernet will CHALLENGE the deeper layers. connect cloud data centers and will While intra-data-center con- support optical metro aggregation nectivity seems to be migrating to and OTN-based cloud core net- 400 GIGABIT ETHERNET IN fabric switching, and away from works. While these missions areTHE ENTERPRISE … traditional stacks of LAN switches, more limited than that of 1 GbE, for REALLY? that may not preclude the need for example, they will be of paramount faster, 400 GbEd. Fabric switches importance to network design in the today either have no internal trunk future, and so it is very likely that connections, or base their connec- the race for faster Ethernet will con- tions on standards other than Eth- tinue. n NETWORK EVOLUTION E-ZINE • DECEMBER 2012   14
  15. 15. ABOUT THE AUTHORS Shamus McGillicuddy is the director of news and features for TechTarget Networking Media. He writes about networking, security, data centers, net- work management and other topics for He also man- HOME ages overall news coverage for TechTar- get’s other networking sites, including Networking Evolution is a e-publication., EDITOR’S DESK and Search- Before joining Tech- Kate Gerwig Target in 2006, Shamus was an award- Editorial Director LET THE 40 winning reporter for The Patriot Ledger, aGIGABIT ETHERNET daily newspaper in Massachusetts. Rivka Gewirtz LittleMIGRATION BEGIN Executive Editor Jim Frey is the managing research direc- Shamus McGillicuddy ULTRA-FAST tor at Enterprise Management Associ- Director of News and Features ETHERNET AND ates. Frey has 24 years of experienceTHE MONITORING in the computing industry developing, Kara Gattine CHALLENGE deploying, managing, and market- Senior Managing Editor ing software and hardware products, with the last 18 of those years spent in Linda Koury 400 GIGABIT network management, straddling both Director of Online Design ETHERNET IN enterprise and service provider sectors.THE ENTERPRISE … REALLY? Scott Kelly Associate Publisher Tom Nolle is a strategic egghead— someone who first wants to know the truth, no matter what it is, and then TechTarget wants to explain it in a way that reaches 275 Grove Street, Newton, MA 02466 everyone who cares to know it. He’s an analyst in telecommunications, media and technology, and a former software ©2012 TechTarget Inc. No part of this publication architect who now works to blend tech- may be transmitted or reproduced in any form or nology detail and business reality. He has by any means without written permission from the publisher. TechTarget reprints are available through more than 30 years of experience as an The YGS Group. author and analyst, covering the most complicated and important develop- About TechTarget: TechTarget publishes media for infor- ments in the industry. Nolle is president mation technology professionals. More than 100 focused of CIMI Corp., a strategic consulting firm websites enable quick access to a deep store of news, advice and analysis about the technologies, products and processes specializing in telecom and data commu- crucial to your job. Our live and virtual events give you direct nications since 1982. He is the publisher access to independent expert commentary and advice. At of Netwatcher, a journal addressing IT Knowledge Exchange, our social community, you can get advice and share solutions with peers and experts. advanced telecom strategy issues. NETWORK EVOLUTION E-ZINE • DECEMBER 2012   15