Many network engineers recall the iOS7 update on September 18, 2013 as one of the most historic download days of their network’s history. All the more reason for us in the wireless world who anxiously anticipated the September 17 release of iOS8.
We asked a few of our customers to monitor the effect of the software release on their networks and the results for the first two days are in. Those in the education and healthcare space in particular are filled with early adopters of WiFi technology and devices, and eager to get their hands on the latest updates.
Joe Rogers, Associate Network Director at the University of South Florida shared this picture with us from 1pm September 17th, showing 1 Gbps more traffic than he would normally see at this time of day:
Another customer, Greg Sawyer, Manager of Infrastructure Services, shared this picture of the iOS8 effect on his network at the UNSW Australia.
He noted that his experience handling the release this year felt smoother than last year, despite the new peak internet download of 4.65 Gbps and 21Tb downloaded for the day! Not too surprising when considering that there were 27,000 concurrent connections on the wireless network and approximately 60% of those being Apple devices.
How should organizations be considering and handling these network spikes? I sat down with Cisco technical leaders Matt MacPherson and Chris Spain (@Spain_Chris) to get some insight on the effect of big updates like iOS8 on the wireless network. Here are some of the highlights of what we discussed:
The World We Live In
The truth is, more and more services are being moved to the cloud—a cloud that will push updates to millions & in the future billions of users and devices on our networks. Read More »
Tags: #80211ac, 11ac, 8.0, 802.11, 802.11ac, 802.11n, aireOS, Akamai, Android, App, Apple, application, bandwidth, best practice, Burst, business-critical, byod, byte, cache, Cisco, cloud, control, design, device, engineer, fix, Gbps, guide, infrastructure, internet, IOS, ios8, iphone, iphone 6, iphone6, IT admin, IT administration, itunes, mbps, mixpanel, mobile, mobility, network, operation system, OS, patch, peak, pervasive, policy, protocol, protocol pack 11, release, secure, security, services, signal, TB, technology, throughput, unsw, update, USF, visibility, WAN, wi-fi, wide area network, wifi, wireless
Superior Platforms, Scale, and Operational Simplicity
Data Center trends like Virtualization, Solid State Drives, DC consolidation and Data Explosion are putting a tremendous amount of strain on the infrastructure. These challenges need targeted and multifaceted approach. It has to be holistic solution to the problems rather than point products for each unique problem. Data Centers require improvements in performance, flexibility, scalability, and reliability and ease of management. To address that Cisco revamped the MDS product line, the journey we started last year when we introduced 9710 and 9250i.
9710 – Director Class Switch with 3x the performance of any director, 384 ports of line rate 16G FC, highest reliability and flexibility.
9250i – Services Appliance supporting 10G FCIP, 16G FC and 10G FCoE in addition to IO Acceleration, Data Mobility Migration in compact 2 RU form factor.
We had a great success with the product line with steepest ramp and amazing customer feedback. Building on the success we have added new members to the product family and extended the innovation to allow for simpler management and scalable deployments.
a) Three New Products
- MDS 9148S – Industries’ most versatile affordable 1RU switch with High-Performance, Easy of Deployment, Enterprise-class features
- MDS 9706 – Unprecedented investment protection with high performance, reliability and multi-protocol flexibility
- High Density line rate 10G FCoE Card – For customers to adopt high density FCoE in incremental non-disruptive fashion on the existing FC footprint without forklift upgrades.
b) New Scalable Deployment Options
- Much Higher Scalability for SAN Infrastructures.
- Dynamic FCoE over Fabric Path
- Data migration enhancements for speed, scale and resiliency
c) New Management Features
- Hardware based FC Congestion Detection and Recovery
- Integration with Industry leading Platforms
- End to End Visibility
- Switch Health Score
With the addition of new members Cisco not only has best of the breed products but also broadest product portfolio. This allows customers to design the SAN precisely to their needs from small departmental SANs to the largest enterprises, from traditional LAN, SAN networks to fully converged fabric and everything in between.
Attend the Webinar on August 12th 8:00 PST to learn more : Register Now
Lets look at the capabilities of each product in little more detail
Cisco MDS 9148S: High-Performance, Easy to Deploy, Enterprise-class Fabric Switch
Versatile: 9148S pay as you grow model allows customers to start from small base and grow . It allows customers to grow from 12 Ports to 24, 36 and finally 48 without any rip and replace. It allows customers to go from 2/4/8G to 16G FC speeds. It is not only the most affordable switch shipping today across all the possible configurations but with 2x the range of ports it allows unparalleled scalability for future growth.
Ease of use: Power On Auto provisioning which allows 9148 and 9148S to automate switch setup. From getting DHCP, to downloading and applying the software to the final configuration is done automatically. Quick configuration wizard allows the box to be configured in an easy way. It shares the same NxOS as rest of the MDS and Nexus products. Power on Auto Provisioning (POAP) is important for large scale data centers where 9148S will be used as Top of the Rack (ToR) switch and distributed throughout the data center. This saves customer to go from box to box with the serial cable and program them individually. It allows for rapid, error free and consistent provisioning.
Enterprise Class switch: It offers the rich Enterprise features like non-disruptive software upgrade,32 Virtual SANs (VSANs), Inter-VSAN Routing (IVR), QOS, PortChannels, N-Port ID Virtualization (NPIV), N-Port Virtualization (NPV), Comprehensive Security in addition to redundant power supplies and fans. Its first of the kind switch in the industry to allow hardware based slow drain detection and recovery. It has back to front airflow.
Customer Use Case: Customer will use the 9148S to design small SAN environments like departmental SANs. Larger Enterprises will use 9148S as ToR Switch for ease of cabling and ease of Management. In addition to that 9148S will be used for BC/DR or remote locations. Pay as you go model is very attractive to customers as it allows them to grow the port count from 12 to 48 without any price penalty as their network demands grow.
Cisco MDS 9706: Extending MDS 9710 Director Qualities to a Smaller Form Factor
It is the highest performance director in the industry. It provides 3X the bandwidth compared to any compact director in the industry. Not only it provide 192 ports line rate performance at 16G but it is designed to provide line rate performance at 32G FC and 40G FCoE when those line cards are introduced without the forklift upgrades using the same type of fabric cards. With 6 fabric cards it provides 1.5Tbps of bandwidth per slot.
In addition to that this is industries first class of directors to offer Redundancy on all critical components including fabric cards. Smaller failure domain, Forward error correction, multi-point CRC checks, predictable and consistent performance for both latency and throughput.
Small to medium enterprises will use 9706 as Middle of the row and end of row switch in addition line rate 16G performance allows it to be used for connectivity to targets in addition to host connectivity. It will be used for both edge core and edge-core-edge designs.
In addition to the pod like deployments where 9RU form factor and 192 ports of line rate at 16G is very attractive.
Some of the specs of the switch are enumerated below
- 1.5 Tbps per slot switching capability
192 ports of 16G FC line rate today with 100% head room to grow to 32G FC) without forklift upgrade
- Industries Highest Reliability
N+1 Fabric redundancy, smaller failure domains, Forward Error Correction, CRC error checks at multiple points, In service software upgrades, Crossbar design with central arbitration and Virtual Output Queuing ensure customers not only get highest availability but also predictable and consistent throughput independent of the traffic profile.
With ability to support both FC and FCoE line cards. With capability to support 2/4/8/10/16G FC and 10G FCoE today and performance to support 32G FC and 40G FCoE on the same footprint.
Industry’s Highest-Density FCoE Module on a FC Director
With 48 ports this has the highest port density and greatest flexibility in the industry. Without any restrictions Cisco customers can now orchestrate FC, FCoE and mixed solutions. FCoE line card afford customers ability to design FC solutions and incrementally deploy FCoE without forklift upgrades and meeting the same features, reliability and availability as afforded by FC.
In addition to hardware we added extensive capabilities to enable small size to cloud scale deployments.
To support large scale out and scale up deployment models we have increased the scalability limits for the SAN infrastructure. The industry leading scalability numbers allow Cisco customer’s unprecedented future proofing and scalability to Scale out or Scale-up. Finally the Data Mobility Migration has 2x the speed and 8x the scale and higher resiliency.
Simplifying SAN Management
In addition to enhanced capabilities in Cisco tools MDS family is integrated with industry standard tools to provide faster configurations like automated zoning. Some of the examples of the tools are UCS Director, EMC ViPR, Microsoft System Center VMM and IBM PpowerVC.
To address complexity in the data-centers Cisco is focused on SAN Management simplification. First and foremost that is top of mind for customers is slow drain. If there are slow draining devices in the network it chokes the entire fabric. These conditions are transient, extremely difficult to isolate, debug and fix. To detect and recover for these conditions Cisco introduced Slow Drain Detection and Recovery in software in previous generation of devices. Now with the new products we have provided the support for these devices to run the slow drain detection and recovery in the hardware rather than waiting for software to come around polling individual ports every 100 ms which is a life time in the data center. As the table below shows with hardware based slow drain the detection speed has increased 100 times and recovery is of the order of nano seconds rather than 100ms.
||Recovery Action Latency – Start and Stop
||MDS 9500MDS 9148
||MDS 9700, MDS 9250i, MDS 9148S
For more info read this whitepaper
In addition to that Data Center Network Manager (DCNM) provides end to end visibility from hosts (virtual or Physical) through switches (MDS or Nexus) into the storage arrays independent of the protocol. DCNM is single pane of glass visibility into the Data Center for both SAN and LAN.
Host Path Redundancy Analysis checks the network every 24 hours or customer designated interval if there is end to end dual paths from Host to the target. It checks against port down situations, VSAN mismatches, VSAN Segmentation, LUN mismatches as well as makes sure both the ports are not on the same line cards. Similar activity that used to take months is now completed on the fly every 24 hours reducing risk and time to repair. Further more administrators are not surprised by an outage as they have complete visibility for the dual paths. Furthermore having both the paths up allows to mitigate any silent failures as well as avoid outages if one of the SAN fails.
Switch health score is another unique capability of DCNM to track switch health over time. It allows customer to quickly determine level of risk, isolate and fix the alerts resulting in low health score and track the health of the SAN over time.
As I started the discussion today Data Centers need a holistic approach to solving the challenges of the data center. Customers not only need higher performance, investment protection, lower opex and capex, reliability but also ease of management and tightly integrated end to end solution. The solutions and capabilities I described allows us to solve the challenges faced by data centers not only today for the years to come. We introduced MDS products in 2002 and since then we have introduced industries first innovation, just few examples out of that are enumerated below. We will continue to innovate in this space for the next decade.
Sr. Product Manager, DCBU
“The best time to plant a tree was 20 years ago. The second best time is now”
Tags: 16 Gigabit, 16G FC, 16Gb, 16Gb Fibre Channel, 192 Port, 9148S, 9706, 9710, architecture, availability, best practices, Cisco, cloud, Cloud Computing, Consolidation, convergence, data center, Data Mobility Manager, DCNM, design, Director, dmm, FCIP, FCoE, Fibre Channel, Fibre Channel over Ethernet, IO accelerator, it-as-a-service, MDS, MDS design, nexus, NX-OS, reliability, SAN, Storage, storage area networks, switch, switching, Unified Data Center, Unified Fabric, virtualization
Every year a new attendance record is set at Mobile World Congress by networkers participating from over 200 countries across the globe. This grand attendance of industry-defining vendors, technology enthusiasts and exhibitors triggers an explosive growth in the number of Wi-Fi capable devices being brought to the event. For MWC 2014, Cisco partnered with Fira Gran Via and GSMA to pull off one of the most successful high density Wi-Fi network deployments in the history of global tech events. This blog kicks off a series to provide a glimpse of behind the network, into the design stages, and the course of actions undertaken to implement a robust high density wireless network which served more than 22,000 concurrently connected unique devices and a total of 80,880 devices throughout the event. Full details in whitepaper here.
Setting the Scene
Divided into eight massive exhibition halls, Fira Gran Via covers around 3 million square feet (280,000 square meters) of area which also includes outdoor areas, restaurants, conference rooms, network lounges and a continuous elevated walkway flowing through the entire venue. Higher the environmental complexity, the more fun and challenging it is to achieve the right wireless design for a pervasive network that meets all the needs.
An aerial view of Mobile World Congress 2014 arena at Fira Gran Via, Barcelona
Generally, the physical design of large convention and exhibition halls bear an impish knack of unfavorable conditions for a ubiquitous high density Wi-Fi network, owing mostly to the lofty ceiling heights and construction components. Read More »
Tags: 2.4 GHz, access point, antenna, antennas, AP, architect, barcelona, beamforming, cell isolation, cleanair, ClientLink, convention center, coverage, deployment, design, device, event, fira gran via, GHz, hardware, HD, HDX, high density, infrastructure, interference, management, mobile, mobile world congress, mobility, mwc, network, networking, radio resource management, rf, RRM, rx-sop, site survey, site visit, tech, technology, venue, wi-fi, wifi, wireless
It’s always interesting and often entertaining to observe how competitors promote their products and what they choose to focus on—and more importantly, what they choose not to focus on and what they hope people won’t ask questions about.
Consider yet again how a competitor chooses to position their “purpose built” AP vs. the Cisco Aironet 3700 802.11ac Access Point Series.
This competitor frequently (and somewhat obsessively) points out that its 802.11ac AP has dual “active” 800 MHz cores while the Cisco AP3700 has only one “active” 800 MHz core. This is not completely true since it completely overlooks the fact that the Cisco AP3700 also has a dedicated CPU core and DSP for each radio subsystem.
Furthermore, it also overlooks that the dual “active” cores in the competitor’s AP share 512 MB of DRAM. The single “active” core of the AP3700 has dedicated 512 MB of DRAM. Also each radio subsystem has a dedicated 128 MB DRAM (for 768 MB total DRAM in the AP3700).
Why is all of this important? Read More »
Tags: 11ac, 802.11ac, access point, AP, architecture, ASIC, client, compute, Computing, design, device, DRAM, efficiency, hardware, HD, HDX, high density, Industry, infrastructure, LAN, MB, memory, memory management, Mhz, mobile, mobility, network, networking, performance, rf, system, wi-fi, wifi, wireless, wlan
Usability testing a support mobile page at the NetVet lounge with NetVet Mike Williams.
Recently at CiscoLive!, we spent a full week with customers and partners doing in-detail usability tests of Cisco.com and some of our mobile sites and apps. This is one of the main methods we use to make our web and mobile easier.
What’s a usability test? Something different than you might think. While you’ve probably heard of other research techniques like focus groups and surveys, usability tests and listening labs are a way for us to learn through observing how people use our sites: We have someone sit down in front of the screen and ask them to do a task that they would in their real work day. This could be solving a support question, researching a new product, finding the right download, investigating a new API, or any number of other things.
Here’s the difference between a usability test vs. a focus group or survey: In a focus group, a facilitator often throws out an idea or scenario and gets a group of people to comment on it. The people in the room will tell you what they might like… they will build on others comments… they may give you some great ideas! But, you won’t really be learning by observing. You won’t understand the kinds of things they will actually do in real life, because you’re asking them what they think they would do. You aren’t observing.
But when we observe people using our mobile apps or web sites, we can see lots of things. For instance:
- We can see the areas that trip them up (even if they report to us that the experience is just fine)
- We can see the areas where they’re getting the wrong result (even if they think they’re getting the right one).
- Or sometimes even technical problems that we see and can troubleshoot, but they can’t.
We recommend running usability tests or listening labs at multiple stages for major projects:
- At the beginning of the project – when you want to understand current state and also look at how competitive or best practice sites and apps are doing.
- In the middle – while you’re still developing, and direct observation and feedback can make a huge difference
- Before release – so you can catch any last-minute problems
- After release – because sometimes when outside factors and environments affect the app or web experience in way you can’t expect (for instance, how and whether people can find your site topic on Google or other search engines, and how they interact with the results).
Even though this sounds like a lot of testing, there are some new techniques you can use to get real user feedback very quickly – within hours or days. I’ll talk about that in a future post.
Meanwhile, keep testing. And, remember baseball legend Yogi Berra, who said:
“You can observe a lot by watching!”
Tags: cisco.com, design, mobile, usability, user experience