Ll aa nn ss ww ii tt cc hh ee ss – 3Com Switches User Manual
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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
SuperStack II Switch 3800
Front view
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
Subnet 4
Subnet 5
Subnet 7
Subnet 6
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
WAN
Legacy router
Gigabit Ethernet
(1000 M
bps) server farm
Subnet 1
Subnet 2
Subnet 3
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.