La funzionalità di true stacking per il disegno di una rete, o parti essa, in alta disponibilità. Una rapida analisi delle opportunità messe a disposizione dalla linea di prodotti Prosafe con le famiglie di switch S3300, M4300, M5300 e M7300.

1. ProSAFE Stackable Switches
Stacking per l’Alta Disponibilità (HA)
Andrea Rossi
Senior System Engineer
andrea.rossi@netgear.com

2. NETGEAR Switch Positioning
Smart Managed Switches
Standalone Smart
+ 250-user or less networks
• Rackmount and Desktop
• Web Management only
• PoE/ PoE+ options
• Essential QoS, VLAN, Multicast,
Bandwidth management
• Essential L3 Static Routing
(no resiliency, no load-balancing)
• LIFETIME Warranty
• LIFETIME NBD / Technical Chat
Stackable Smart
+ 250-user or less networks
• S3300 series
• True Stacking technology
• 4 x 10G Ports Uplinks / Stacking
• Distributed link aggregation
across the stack
• Master redundancy (with couple
downtime during failover )
• Rackmount
• Web Management only
• PoE+ options
• Essential QoS, VLAN, Multicast,
Bandwidth management
• DHCP L2 Relay
• Essential L3 Static Routing
(no resiliency, no load-balancing)
• LIFETIME Warranty
• LIFETIME NBD / Technical Chat
Perfect fit for
SMB networks

3. NETGEAR Switch Positioning
Fully Managed Switches
Standalone Managed
+ Networks > 250 users
• M4100, M7100 series
• Telnet, SSH, CLI, Web GUI
• Advanced QoS, VLAN, Multicast,
Bandwidth management
• DHCP L2/L3 Relay
• Advanced L3 Static Routing
(resiliency, load-balancing)
• Scalable hardware
• Granular software
• LIFETIME Warranty / NBD / Chat
Stackable Managed
+ Networks > 250 users
• M5300, M7300, M4300 series
• Full Mesh Stacking technology
• 4 x 10G ports Uplinks / Stacking
• Distributed link aggregation across
the stack
• Master redundancy with hitless,
non-stop forwarding failover
• Telnet, SSH, CLI, Web GUI
• Advanced QoS, VLAN, Multicast,
Bandwidth management
• DHCP L2/L3 Relay
• Advanced L3 Static Routing
(resiliency, load-balancing)
• Full Layer 3 (Dynamic Routing)
• IPv6 to IPv4 tunnelling
• Scalable hardware
• Granular software
• LIFETIME Warranty / NBD / Chat
Smart
Stand-
alone
S3300
Stackable
Best fit for Medium Enterprise
and Campus networks

4. NETGEAR Switch Positioning
Chassis Switching
Managed Chassis Switch
+ Networks > 250 users
• M6100 series
• 480G Distributed Fabric
• Greater inter-module throughput & performance
• Distributed link aggregation across the chassis
• Supervisor redundancy with hitless, non-stop
forwarding failover
• Passive backplane reliability and predictability
advantages over typical stacking architectures
• Telnet, SSH, CLI, Web GUI
• Advanced QoS, VLAN, Multicast, Bandwidth
management
• DHCP L2/L3 Relay
• Advanced L3 Static Routing
(resiliency, load-balancing)
• Full Layer 3 (Dynamic Routing)
• Policy Based Routing for tailored load-balancing
and failover capabilities
• IPv6 to IPv4 tunnelling
• Scalable hardware and granular software
• LIFETIME Warranty / NBD / Chat
Smart
S3300
Stackable
Stand-
alone
M4100, M7100
Standalone
M5300, M7300
Stackable
Best fit for Medium Enterprise
and Campus networks

5. Stackable features
Size of Organisation
Needforcontrol
1-5 5-20 20-100 100-250 250+
Fully Managed
Switches ( 8 units)
Unmanaged
Switches
Complete control
Complex configuration
Basic connectivity
No configuration
Plus
Switches
Smart Stackables (6 units)
Smart Switches

6. Network availability questions
+ How do you backup your network today?
• Spanning Tree (too complex? slow convergence time? Does it even work?)
• Stacking, Distributed link aggregations, active-active server topologies?
+ What happens when parts of your network are down?
+ What is the cost of downtime today? And tomorrow?
+ How critical is the network uptime? Single points of failure?

7. NETGEAR Stacking = Virtual Chassis

8. Stacking benefits
Highly Scalable:
• Switches can be
‘stacked’ with high-
speed shared
bandwidth
• Dedicated ports for
stacking connectivity;
don’t waste valuable
user ports
• Support distance /
remote stacking needs
across multi-sites
Intelligent and Easy
Management:
• Single IP Address
management for entire
stack
• Stack-master
maintains
configuration for all
members
• Stack-master
automatically
synchronizes software
for all members
Highly Redundant
• In Ring configuration,
stack stays alive in
case of failure of any
switch
• Failover mechanism in
case master fails
• Hot swappable
solution

9. Stacking:
Limitations
+ Resources are reduced to master of the stack.
+ Proprietary solution
9

10. Virtual Chassis Stacking Technology
10
• Smarter network design
• Smarter server connection
Active Link (up)
Stacked Ethernet Switches
Server or Storage
device
Active Link (up)
Active Link (up)
Stacked Ethernet Switches
Active Link (up)
Aggregation or Core
layer
• Local and/or Remote
• Local DAC cables 1-3m
• Remote: 10G Fiber or
10G Ethernet
• Master Failover

11. SPT Free = Stacking + Distributed LAG
Active – Active Links
Sub sec convergence time
Single Administration points

12. Stacking:
How to stack S3300 smart switches
+ Up to six switches per stack
•2x 10Gbps ports, available for 10G optical stacking
+ Ring
• Stacking redundancy with a total bandwidth of 40Gbps
+ Chain
•Non redundant with a total bandwidth of 20Gbps
© Introduction & Technical Training NETGEAR Smart Switching12

13. Stacking:
How to stack M5300 full managed switches
+ Up to eight switches per stack
•Last 2 ports, available for 10G optical stacking
•2 slot’s for stacking- or expansion modules.
+ Ring
• Stacking redundancy
• 48Gbps
+ Chain
• Non redundant
• 24Gbps
© Introduction & Technical Training NETGEAR Smart Switching13

14. Stacking:
How to stack M4300 full managed switches

15. Models XSM43xx
Models GSM43xx

16. Stacking:
How to stack M7300 10G managed switches
+ Dual Ring
• Stacking redundancy
• 80Gpbs
16
VLAN

17. Education on Availability
+ All about how to get rid of
Spanning Tree ‘backup’
+ Spanning Tree is slow and too
complex for midsize networks
+ Stacking allows for distributed
link aggregations hence
providing load-balancing AND
redundancy / failover capabilities
+ Stacking is all about how FAST the recovery must be

18. Education on Availability
+ Stackable Smart Managed can
offer ‘reduced’ downtimes
+ Stackable Fully Managed can
offer NSF sub-second failovers’
+ Chassis Switches will allow for
Non-Stop-Forwarding in any
situation with added
predictability over stack (fixed
architecture) and more efficient
N+1 power redundancy

19. Stacking Availability – facts
+ What is your downtime expectation for devices and clients
connected to the stack in case of a switch failure?
Stack
Failsafe
Features
Servers
Rest of the network
Things to explain