EXPERIENCE. Understanding the full data path. #WLPC_EU Talk. Chris

Transcription

1 Understanding the full data path EXPERIENCE For WiFi And Engineers the many way s to get it #WLPC_EU Talk Chris

2 \\ Chris Avants Sr. Instructor / Author / Consultant Recent Projects Rockstar Wireless Networking WiFi Training CCIE Wireless v3.0 Workbook Fast Lane (Dec 2016) 35+ Certifications, still learning CCIE Wireless v.31 Workbook WiFi Training / Fast Lane (March 18) 2

3 \\ The point(s) of this discussion Understanding RF / WiFi is Key Understanding the full data path, is now required. New technology is always coming / changing

4 \\ Not enough to point fingers, anymore They may point them right back 4

5 \\ Enterprise Campus 3 Layer Design Campus Access Layer WiFi is of course #1 network access method (Can t nobody hold us now ) APs aggregate users to switch Access aggregates to distribution. Distribution to core. Most WiFi Engineers comfortable with this concept, right? Great is their more to know? 5

6 \\ Survey s are Great / Required! One way or another, you have to do surveys. We know that. People have different approaches, spend time learning, (see Experience Presentation). Find what works, but be open to new ideas. Would you feel comfortable doing a greenfield or brownfield design and having no say, or no understanding of the rest of the infrastructure?

7 \\ Design for Location \ Is that all? RF must be designed correctly APs must be staged/primed, and placed correctly (name, HA, venue, floor) Maps must be imported i.e. Prime / CMX (no small or easy job here) Calibration phase Vendors have specific latency and sizing requirements, b/w, etc. CMX Analytics 7

8 \\ There s a larger picture Several new WiFi AP / Controller Deployment Models (Centralized, Flex, Autonomous (Fat), Lightweight (thin), Converged, CLOUD What about IDF s / MDF s? Are you sure cabling support s environment? (Distance, CATX) What about uplinks between Access, Distribution, Core, Data Center, Layers? What about WAN availability? What about all the network protocols? What is this scary new SDN concept? Every network design designers goal should be QoE. Quality of Experience. Truth is lots of variables other than RF affect this. 8

9 \\ IDF / MDF Locations Images are worth 1000 words. Some can also be worth NO words at all Are APs within 100m of the closets? Do you have access port real-estate? Do we have required PoE? (many variables) What about our uplinks? Will adding APs, strain already strained uplinks? Can we verify cabling? (Air Check G2, Cable Testers, etc. etc.) 9

10 \\ The Wireless Enterprise 10

11 \\ A look at Service Layers (Blocks) Service blocks create smaller focused segments of technology Different skillset s required for each service block Not saying you need to be able to configure everything, at a min just understand traffic path from WiFi users Also good to understand technologies around controller integrations, protocols and traffic generated by them 11

12 \\ Centrally Switched Aps (Split Mac) Deployment likely most are familiar with. Controller s at the head end APs managed via Controller at headend Security at Central Site Simple controller redundancy 12

13 \\ FLEX / Local Switch / Centrally Managed Deployments 13

14 \\ Cloud & Hybrid Deployments WAN / Internet Service Blocks very important. Client traffic terminated locally May integrate Enterprise platforms to Cloud for branch. That s Enterprise to Cloud, Cloud to Branch, and visa-versa. No the APs wont just work without a good RF design. 14

15 \\ What about our protocols and Mobility? We are all likely familiar with CAPWAP What about Mobility Messaging (EoIP, CAPWAP) What about security protocols? 802.1X, RADIUS, EAP(s), Web-Auth, ACL s What about application requirements? - Big variable; Depends on Application (DoA) What about EtherChannel, LACP, for controller, switch redundancy. What about HSRP / VRRP, FHR Protocols? What about QoS / AVC? How does this new SDN factor in to design? 15

16 \\ Just a few L2 protocols ARP Address Resolution Protocol ARCnet Attached Resource Computer NETwork CDP Cisco Discovery Protocol DCAP Data Link Switching Client Access Protocol Distributed Multi-Link Trunking Distributed Split Multi-Link Trunking Dynamic Trunking Protocol Ethernet FDDI Fiber Distributed Data Interface Frame Relay HDLC High-Level Data Link Control LACP Link Aggregation Control Protocol LocalTalk L2TP Layer 2 Tunneling Protocol LAPD Link Access Procedures on the D channel LLDP Link Layer Discovery Protocol LLDP-MED Link Layer Discovery Protocol - Media Endpoint Discovery PAgP - Cisco Systems proprietary link aggregation protocol PPP Point-to-Point Protocol Q.710 Simplified Message Transfer Part Multi-link trunking Protocol NDP Neighbor Discovery Protocol StarLAN STP Spanning Tree Protocol VTP VLAN Trunking Protocol VLAN Virtual Local Area Network 16

17 \\ SDN Overview How does this change your RF designs? Still will not fix poor RF Designs As far as Wired side, several things changing Ability to streamline required L2/L3 protocols & QoS without manual reconfiguration of the enterprise. Application request priority from the network Only allowed / selected applications receive the priority. 17

18 \\ SDN / ACI Demo 18

19 \\ Take Away WiFi Engineers need to understand the full data path, understand user traffic flows. No technology can fix poor RF / WiFi Design Site Survey s are crucial, planning crucial Several deployment architectures now, not only centralized (split-mac) learn them If you don t understand the architectures, protocols, where they begin and end (see first Experience presentation) Networks are evolving, new opportunities in SDN Most companies are still few years away from refreshing or adoption full SDN Never programmed, want to know where to get started? Microsoft (Learn to Code, Free), would also recommend Python for beginners class 19

20 \\ Questions? THANK Experts are always Learning!! 20