The
Catalyst 3900 comes with 20 fixed ports and a unique FlexSlot that can
accommodate two expansion modules or, in the future, one double-wide module.
Available expansion modules include a 1-port ATM OC-3c uplink, a 2-port
fiber and copper Inter-Switch Link (ISL) uplink for Token Ring transport
over Fast Ethernet, a 4-port fiber Token Ring module, and a 4-port copper
Token Ring module. The Catalyst 3920 comes standard with 24 fixed ports.
Both
the Catalyst 3900 and 3920 offer a stack port (optional on the 3900, built-in
on the 3920) which allows two units to be interconnected back-to-back,
or up to eight units to be interconnected using the Catalyst 3020 Matrix
Switch.
Catalyst
3900 Front View
Catalyst
3920 Front View
The
Catalyst 3900 has the following features:
20
shielded Token Ring ports for 150-ohm STP or 100-ohm UTP connectivity
FlexSlot
accommodating two expansion modules or one double-wide module for
future expansion
Nine-pin
EIA/TIA-232 interface for local console or modem connectivity
Support
for the following bridging modes: SRS, SRB, SRT
The
Catalyst 3920 provides the following features:
24
shielded Token Ring ports for 150-ohm STP or 100-ohm UTP connectivity
Nine-pin
EIA/TIA-232 interface for local console or modem connectivity
Support
for the following bridging modes: SRS, SRB, SRT
Adaptive
cut-through switching
Automatic
4, 16 and 32 Mbps speed adaptation
Automatic
shared and dedicated adaptation (DTR)
Two
priority queues for multimedia traffic
TokenChannel
switch interconnect
MAC
address and protocol (DSAP/SNAP) filters
All-routes
explorer reduction
Broadcast
rate protection
IEEE
and IBM Spanning-Tree Protocol
Technical
Specifications for the Catalyst 3900
Description
Specifications
Ports
20
1 EIA/TIA-232
console
1 stack
port slot (rear)
1 FlexSlot
that supports up to 2 expansion modules
Expansion
Modules
4-port
Token Ring fiber
4-port
Token Ring copper
1-port
ATM OC-3c
2-port
100BaseTX with ISL
2-port
100BaseFX with ISL
Front
panel indicators
System
power
Mode
Fault
Port:
insert, activity
Stack
port expansion module:
Transmit
Receive
Attach
Buffers
1 MB
DRAM per group of 4 ports
Addresses
6500
per group of 4 ports; 10,000 per system
Protocol
compatibility
Transparent
to higher-level protocols
Network
management
MIB
for Network Management of TCP/IP-Based Internets: MIB-II (RFC 1213)
Definitions
of Managed Objects for Bridges (RFC 1493)
Evolution
of Interfaces Group of MIB-II (RFC 1573)
Token
Ring Extensions to the Managed Objects for SRB (RFC 1525)
IEEE
802.5 Token Ring MIB (RFC 1748)
RMON
(RFC 1757) Statistics, History, Alarms, and Events groups
RMON
Token Ring Extensions (RFC 1513) Token Ring extensions for Statistics,
History, Alarms, and Events groups Ring Station Order Group Ring
Station Control Table
IEEE
802.5 DTR Concentrator MIB
IEEE
802.5 DTR MAC MIB
Catalyst
3900 Enterprise MIB
Cisco
VLAN Trunking Protocol MIB
Cisco
Discovery Protocol MIB
Memory
8 MB
DRAM
Processor
Intel
i960SA
Technical
Specifications for Catalyst 3920
Description
Specification
Ports
24
1 EIA/TIA-232
console (rear)
1 stack
port slot (rear)
Expansion
Modules
Front
panel indicators
System
power
Mode
Fault
Port:
insert, activity
Stack
port:
Transmit
Receive
Attach
RPS
present
RPS
good on
Internal
power supply good
Buffers
1 MB
DRAM per group of 4 ports
Addresses
6500
per group of 4 ports; 10,000 per system
Protocol
compatibility
Transparent
to higher-level protocols
Network
management
MIB
for Network Management of TCP/IP-Based Internets: MIB-II (RFC 1213)
Definitions
of Managed Objects for Bridges (RFC 1493)
Evolution
of Interfaces Group of MIB-II (RFC 1573)
Token
Ring Extensions to the Managed Objects for SRB (RFC 1525)
IEEE
802.5 Token Ring MIB (RFC 1748)
RMON
(RFC 1757)
Statistics,
History, Alarms, and Events groups
RMON
Token Ring Extensions (RFC 1513)
Token
Ring extensions for Statistics, History, Alarms, and Events groups
Ring
Station Order Group
Ring
Station Control Table
IEEE
802.5 DTR Concentrator MIB
IEEE
802.5 DTR MAC MIB
Catalyst
3900 Enterprise MIB
Memory
8 MB
DRAM
Processor
Intel
i960SA
Part Numbers for the Catalyst 3900 Series
Part
Description
Part
Number
Catalyst
3900 Series Workgroup Switches
Catalyst
3900 20-Port Token Ring Switch
WS-C3900
Catalyst
3920 24-Port Token Ring Switch
WS-C3920
Modules
for the Catalyst 3900
Catalyst
3900 Stack Port Module
WS-C3900-STACK
Catalyst
3900 Stack Port Module
WS-C3900-STACK=
1
Port 155 Mbps ATM Feature Card (MMF, SC)
WS-C3900-ATMSC
1
Port 155 Mbps ATM Feature Card (MMF, SC)
WS-C3900-ATMSC=
4
Port Token Ring Feature Card (UTP/STP,RJ45)
WS-C3900-4R
4
Port Token Ring Feature Card (UTP/STP,RJ45)
WS-C3900-4R=
4
Port Fiber Token Ring Feature Card (MMF, ST)
WS-C3900-4RF
4
Port Fiber Token Ring Feature Card (MMF, ST)
WS-C3900-4RF=
2
port 100BaseTX With ISL Feature Card (UTP, RJ45)
WS-C3900-2ISL
2
port 100BaseTX With ISL Feature Card (UTP, RJ45)
