3com TR ユーザーズマニュアル
1-10
C
HAPTER
1: O
VERVIEW
to run each of these bandwidth-intensive applications
across networks.
across networks.
The primary benefits of ATM include:
■
ATM is a cell-based communications technology
that easily scales from T1 or ATM 25 to OC-3 (155
Mbps), OC-12 (622 Mbps), OC-48 (2.488 Gbps),
and OC-192 (10 Gbps).
that easily scales from T1 or ATM 25 to OC-3 (155
Mbps), OC-12 (622 Mbps), OC-48 (2.488 Gbps),
and OC-192 (10 Gbps).
■
Additional services are easily added to existing
ATM networks.
ATM networks.
■
ATM networks are designed for growth and pro-
vide future scalability.
vide future scalability.
■
ATM provides LAN Emulation (LANE) technology
which provides interoperability between existing
Token Ring, Ethernet, and ATM devices.
which provides interoperability between existing
Token Ring, Ethernet, and ATM devices.
Summary of ATM Features
The following list summarizes the features of the
SuperStack II Switch 2000 TR ATM module.
SuperStack II Switch 2000 TR ATM module.
■
Conforms to ATM Forum Standards
■
Meets OC-3c 155 Mbps interface
■
SONET (STS 3c) and SDH (STM-1) compliant
■
Multimode Fiber, SC connections
■
LAN Emulation (LANE) version 1.0
■
16 Emulated LAN Clients
■
512 Virtual Circuits
■
1024 remote MAC addresses
■
User-to-Network Interface (UNI) 3.1
■
Interim Local Management Interface (ILMI)
■
AAL5 ATM Adaptation Layer
■
16 Virtual LANs (VLANs)
■
Data buffer to store 40,000 ATM cells
■
Wire Rate Transmission on ATM port
■
Low Latency (68 microseconds between ATM and
Token Ring components).
Token Ring components).
■
3Com SmartAgent support, including:
■
SNMP management using 3Com’s Transcend
Enterprise Manager.
Enterprise Manager.
■
Telnet management using VT100 interface.
The FDDI Module
The SuperStack II Switch TR FDDI module provides a
high-speed connection between the Switch 2000 TR
and FDDI backbone networks. When positioned in
workgroup or departmental LANs, the FDDI downlink
module offers a 100 MB data path to building,
campus or FDDI network backbones directly from the
Switch 2000 TR. Perfect for providing cost-effective
FDDI access to smaller isolated LANs or bandwidth
intensive and mission critical applications. The FDDI
downlink also provides a logical migration path for
existing Token Ring LANs to mainstream networking
technologies.
high-speed connection between the Switch 2000 TR
and FDDI backbone networks. When positioned in
workgroup or departmental LANs, the FDDI downlink
module offers a 100 MB data path to building,
campus or FDDI network backbones directly from the
Switch 2000 TR. Perfect for providing cost-effective
FDDI access to smaller isolated LANs or bandwidth
intensive and mission critical applications. The FDDI
downlink also provides a logical migration path for
existing Token Ring LANs to mainstream networking
technologies.
Redundant links can protect your Switch 2000 TR
from network failure or equipment inconsistencies.
The built-in Software Upgrade feature allows you to
download software revisions easily.
from network failure or equipment inconsistencies.
The built-in Software Upgrade feature allows you to
download software revisions easily.