Transcript prosafel3switch_trai..

ProSafe Layer 3 Switching
Demetrios Coulis
[email protected]
Product Line Manager
NETGEAR
Agenda
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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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OSI Networking Model (Ethernet)
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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)
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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
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Layer 2 Switching
FSM750S
FVX538
GSM7224
FSM726S
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GSM7224
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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…
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Layer 3 Routing
FVX538
FSM750S
FSM726S
GSM7224
GSM7224
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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
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Applications(2)
FVX538
GSM7352S
GSM7328S
GSM7352S
GSM7328S
or
XSM7312
(future)
» Broadcasts are isolated and L3 switching is efficient
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Unmanaged Switches
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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
© .1996-2004 NETGEAR® . All rights reserved
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L2 Smart Switches
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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
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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
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Switch Portfolio
Unmanaged
10/100
Gigabit
5 pt
FS105
FS605
GS105
GS605
8 pt
FS108
FS608
FS108P
GS108
GS608
GS108T
12/16
pt
FS116
FS116P
JFS516
GS116
GS516T
JGS516
24+ pt
FS524
JFS524
JFS524F
GS524T
JGS524
JGS524F
48+ pt
Smart
10/100
Layer 2
Gigabit
10/100
GS716T
Gigabit
10/100
GSM7212
Gigabit
GSM7312
FS726T
FS726TP
FS728TS
GS724T
GS724TS
GS724TPS
FSM726
FSM726S
GSM7224
FSM7328S
FSM7326P
GSM7324
GSM7328S
FS750T2
FS752TPS
GS748T
GS748TS
GS748TPS
FSM750S
GSM7248
FSM7352S
FSM7352PS
GSM7352S
Chassis
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Layer 3
GCM9306
GCM9048
GCM9024
GCM9124
Includes Roadmap Products
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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
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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
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Efficient Network Infrastructure
FVX538
GSM7352S
GSM7328S
GSM7352S
GSM7328S
or
XSM7312
(future)
» Broadcasts are isolated and L3 switching is efficient
© .1996-2004 NETGEAR® . All rights reserved
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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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