BRKEWN-2019 – 7 Ways to Fail as a Wireless Expert
Presenter: Steven Heinsius, Product Manager, Enterprise Networking Group
I’m hoping the title of this session could also be “7 Ways to not be a TOTAL Wireless Noob” since that’s more my level. 
The Basics
- WiFI has been a standard since 1997
Taking a 100 employee company….
- 1999: 1-2 clients on the network
- 2005: 5 or 10
- 2007: 25+ (802.11n came around)
- 2010: 150 (smartphones in the office; laptops becoming the norm in the office)
- 2013: > 200
- 2016: > 300 (3 devices per person)
In 2007-2009, networks were designed for coverage. Those networks are still around and are being asked to support (on average) 3 devices per person.
WiFi is
- Half duplex
- A shared medium (like a hub!)
- AP talks to one client at a time; airtime is time sliced amongst all clients
- AP asks a client to ack every packet (?) it sends to a client
- Acks are retransmitted if not answered which means all other clients have to remain silent (and lowers performance)
Distance vs modulation
- When a client is farther away from the AP, the modulation is stepped down to increase the likelihood that the signal will make it
- The trade off is that Continue reading
BRKNMS-2701 — How I Learned to Stop Worrying and Love Prime Infrastructure
Presenters:
- Lewis Hickman, Consulting Systems Engineer
- Jennifer Valentine, Systems Engineer
BRKARC-3300 — IOS-XE: Enabling the Digital Network Architecture
Presented by Muhammad A Imam, Sr Manager Technical Marketing Engineering
Ironically, Datadog Suffers a Security Breach
Just when it was bragging about its Azure integration.
BRKIOT-2109 – Connecting Oil and Gas Pipelines
Presenters:
- Rick Irons-Mclean, Oil & Gas and Energy Architecture Lead
- Jason Greengrass, IoT Solution Architect
Connected Pipelines Validated Design: coming this week! Cisco.com/go/cvd > Oil & Gas area
- This CVD was built with customer input (from around the globe) and Cisco account team input (including yours truly)
- Next iteration of the CVD will contain more security, including providing better visibility into traffic and events in the control center network
For those that aren’t familiar with the oil/gas business, there’s three areas:
- Upstream: discovery and extraction
- Midstream: storage and transport
- Downstream: refining (turning it into product) and marketing/selling
Cisco can work and play in all three areas. Eg:
- Connected Pipeline
- Connected Refinery
- Secure Ops (managed security services from Cisco)
- Connected Oilfield
ISA95/99 (aka Perdue Model) – describes an architecture for different security zones within the industrial environment.
- Bottom is Level 0 – where the process actually happens (valves, pumps, etc)
- Top is Level 5 – the business/enterprise network
Operational principles (compare this with a typical enterprise environment and principles):
- Continuous operation: 24×7, 365 days a year
- Continuous visibility and control: operators need constant communication to the pipeline
- Safety and compliance: pipeline integrity, safety, security and reliability
With respect to 24×7 Continue reading
China’s Triple Play For Pre-Exascale Systems
Before any country can deploy an exascale system, they have to get pre-exascale prototypes into the field to test out their underlying technologies and determine what approaches have the best chance of scaling up performance and being manufactured affordably. It looks like China is looking at three different pre-exascale systems, and none of them will deploy processors or accelerators made by US companies.
It is no secret that China has wanted to develop an indigenous capability to design chips and build supercomputer-class systems, and this was true even before the US government put the kibosh on selling Intel Xeon and …
China’s Triple Play For Pre-Exascale Systems was written by Timothy Prickett Morgan at The Next Platform.
Cisco Live: Robbins Expands On DNA Strategy
Cisco CEO talks up how Cisco aims to help customers with digital transformation.