3com Switches 사용자 설명서

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The SuperStack II Switch 3800 offers
affordable leading-edge Layer 3
switching technology for 10 times the
performance of intranets. Wire-speed
Layer 3 switching (IP routing) and
Layer 2 switching are embedded in
ASICs to forward at nonblocking 
speed any-to-any intranet traffic while 
broadcast/multicast traffic and fault
propagation are kept under control 
in appropriate subnetworks.

The SuperStack II Switch 3800 

not only aggregates the traffic from 
Ethernet and Fast Ethernet workgroups
to a server farm or a corporate backbone
through an optional Gigabit Ethernet
high-speed link, but it removes router
bottlenecks that occur in corporate 
networks when high-speed, any-to-any
intranet traffic chokes software-based
legacy routers.

Key features include:

■

24 10/100 Mbps Ethernet/Fast 
Ethernet autosensing ports

■

One Gigabit port (1000BASE-SX)
enabled by an optional SuperStack II
Switch 3800 GBIC (gigabit interface
connector). A second GBIC can be
plugged in to provide additional
physical resilience.

■

Full line-rate nonblocking routing
performance on all ports (over 
5 million IP packets per second and
8.7 Gbps throughput)

■

Support for standards-based routing
protocols: RIP/RIP v2

■

Support for up to 12,000 MAC
addresses for handling networks of
virtually any size

■

Elastic port buffering to enable
on-the-fly allocation of memory for
automatic performance optimization
based on network traffic

SuperStack II Switch 3800
10/100/1000 Mbps Ethernet Layer 3 Switching

24 x 10/100BASE-TX/RJ-45 ports

Physically redundant 1000BASE-SX ports

■

IEEE 802.3x flow control on all full-
duplex ports to improve performance
and minimize packet losses

■

Full VLAN implementation:
– Port and tagged VLANs (802.1Q)
– Protocol-based VLANs to allocate

bandwidth and enforce manage-
ment policies among different
protocols (e.g., IP, IPX, NetBIOS,
DECnet)

■

User-definable packet filters to
control traffic flows

■

Support for spanning tree per VLAN

■

Class of Service embedded in
ASIC—PACE technology, 802.1D 
(incorporating 802.1p)

■

RMON support for four groups

■

Simplicity and scalability of
10/100/1000 Ethernet in the
industry-leading SuperStack II
system architecture

Dedicated 100 M

bps to pow

er users

Floor 1

SuperStack II 

    Dual Speed Hub 

       500 with UPS

Mixed 100 Mbps and 10 Mbps users

   with existing segmented 10 Mbps network

Mixed 100 Mbps 

   and 10 Mbps users

Local server on 100 Mbps

Mixed stack of SuperStack II Dual Speed 

   Hub 500, SuperStack II PS Hub 40/50 

      with optional cascade converter, and 

         SuperStack II Switch 3300

100 Mbps

   Trunk

Printer on 

   10 Mbps

Floor 3

Floor 2

PCs

SuperStack

®

 II Switch 1100 

Dedicated 10 Mbps 

   to power user

SuperStack II Hub 

1000 SX

SuperStack II Switch 

   3800 (Layer 3 Sw

itch)

Basem

ent

Legacy router

Gigabit Ethernet 

   (1000 M

bps) server farm

Transcend

®

 network

   management console

100 Mbps

1000 Mbps

10 Mbps

For a dramatic performance boost in corporate routed networks, the SuperStack II Switch 3800 delivers wire-speed IP
routing embedded in ASIC technology through 10/100/1000 Mbps Layer 3 switching.

It offloads the routing of intranet traffic from slow legacy routers while keeping under control broadcast/multicast traffic
and fault propagation in appropriate subnetworks.