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ProSafe Layer 3 Switching

ProSafe Layer 3 Switching. Demetrios Coulis demetrios.coulis@netgear.com Product Line Manager NETGEAR. Agenda. What is Layer 2 switching? What is Layer 3 switching? Difference between Layer 2, Smart and Layer 3 management Why do I need Layer 3? When/how to up sell the customer.

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ProSafe Layer 3 Switching

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  1. ProSafe Layer 3 Switching Demetrios Coulis demetrios.coulis@netgear.com Product Line Manager NETGEAR

  2. Agenda • What is Layer 2 switching? • What is Layer 3 switching? • Difference between Layer 2, Smart and Layer 3 management • Why do I need Layer 3? • When/how to up sell the customer

  3. OSI Networking Model (Ethernet) • Physical data encoding (“What’s on the wire?”) • Data Link layer (MAC addresses) • Network layer (IP addresses) • Transport layer (TCP port numbers or “applications”) • Session • Presentation • Application (API)

  4. Layer 2 Switching • Switches act like a traffic cop • Transmits data between devices within the same “VLAN” • A VLAN or “Virtual Local Area Network” is simply a grouping of ports • Broadcasts contained within a VLAN • Decision for next hop is based on the MAC address • MAC addressing is Layer 2 information • Dedicated bandwidth per port • Non-blocking architecture ensures total bandwidth and prevents dropped packets • Full-Duplex • Collisions eliminated from the days of shared access hubs • 10M, 10/100M, 10/100/1000M and now 10G speeds

  5. Layer 2 Switching FVX538 FSM750S GSM7224 GSM7224 FSM726S

  6. Layer 3 Routing • Routers “route” traffic between separate L2 VLANs • VLANs are isolated broadcast domains • If you connect 2 together it becomes one large broadcast domain • VLAN can also be thought of as a “network” • A group of hosts that share the same network prefix (192.168.1.x) • Decision for next hop is based on the destination IP address • Remember: IP addressing is Layer 3 information • 10M, 10/100M and 10/100/1000M speeds • This is the way it used to be done… • ….slowly…

  7. Layer 3 Routing FVX538 FSM750S GSM7224 FSM726S GSM7224

  8. Layer 3 Switching • New technology – “Put’s the “Routing” into the switch” • Layer 3 look-ups are pushed into ASICs • ASICs = Application Specific Integrated Circuits • Layer 3 is no longer “slow” • End-users don’t have to pay a penalty for “routing” • The old adage “Switch when you can, Route when you must” no longer applies • Layer 3 switching occurs at “wire-speed” • As fast as the wire can theoretically transmit data • 10M, 10/100M, 10/100/1000M and 10G speeds

  9. Applications(2) • Broadcasts are isolated and L3 switching is efficient FVX538 GSM7352S GSM7328S GSM7328S GSM7352S or XSM7312 (future)

  10. Unmanaged Switches • Use L2 information (MAC addresses) • Invisible to the network • Simple to set up/use • Most affordable • Common for • Smaller networks • Edges of large networks • Small user groups • Conference rooms • Dorm rooms

  11. L2 Smart Switches • Use L2 information (MAC addresses) • Smart Switch Discovery Tool assigns an IP address • Accessable via WEB Graphical User interface • Give an IT manager access • Observe network • Configure ports • Configure VLAN, trunks, priority, etc. • Easy to use • Can act as unmanaged • Used in networks >50 users

  12. L2 Managed Switches • Switch information only at Layer 2 (using MAC addresses) • Configurable via serial console port • Complete configuration, including IP address assignment • IP addressing gives access to Telnet, SSH, SNMP and WEB interfaces • Complete control over Layer 2 parameters • IT manager can • Observe network, including RMON (Remote Monitoring via SNMP) • Enable disable port-level parameters • Complete configuration fo VLANs, trunks, Quality of Service, etc. • Easy to use • Currently only stackable solution • Used in networks >50 users

  13. Switch Portfolio Includes Roadmap Products

  14. L3 Managed Switches • Same features and functionality as Layer 2 Managed switches • Supports L3 switching between VLANs when needed • Most flexible product to deploy • L3 is there when/if you need it • Interoperates with other routers to share routing information • RIP v1, v2 standards • OSPFv2 standards • Offloads edge router • Segments networks • Latest features (Priority, Security, BW) • More expensive & sophisticated • Used in networks > 100

  15. Why / When do you need Layer 3 switching? • When VLANs grow too large • Heavy broadcast loads slow a network down • To separate user groups • Organizational requirements • Finance, Manufacturing, Engineering • Security requirements • Layer 3 Access Control Lists (ACLs) help to prevent access • Uptime requirements • Small user groups are easier to troubleshoot • Decreases downtime

  16. Efficient Network Infrastructure • Broadcasts are isolated and L3 switching is efficient FVX538 GSM7352S GSM7328S GSM7328S GSM7352S or XSM7312 (future)

  17. How do I sell Layer 3 switching? • When large “flat” VLANs grow too large and cause outages • Segmented Networks • Run faster • Less Congested • Down less frequently • To meet IT or organizational requirements • Functional segmentation • Security concerns • Uptime requirements and reliance on the network • Layer 3 switching can be sold into any size network • Generally can start as small as 50-100 users • Can also integrate and interoperate in large “enterprise” networks already in place • Branch Office, Remote Office requirements

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