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4 Cisco Product Catalog, July, 2001

Expansion Modules

The Catalyst 3900 has a rear stack port that supports an optional Stack Port module, which provides a 140 Mbps, full-duplex

link between back-to-back switches,or between the Catalyst 3900 and the Catalyst Matrix switch for conﬁguration requiring

up to eight units in a stack.

Other expansion modules include a 4-port ﬁber Token Ring module, a 4-port copper Token Ring module, a 2-port copper

ISL uplink, a 2-port ﬁber ISL uplink, and an ATM OC-3C uplink.

Speciﬁcations

Hardware

Table 21-104: Technical Speciﬁcations for 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

1 2 3 4 5 6 7 8

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