Cabletron Systems 3F00-01, Руководство пользователя

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Chapter 2: Connecting to the Network
Page 2-2 FDDI Dual-Attached Intelligent Module User’s Guide
2.1.1 Dual-attached Station
A dual-attached station (DAS) is connected to both the primary and
secondary FDDI rings. This is the preferred configuration, since it
provides the full benefits of dual-ring operation, allowing the network to
continue to operate if a station or cable fails.
Figure 2-1 shows the ATX, with a 3F00-01 installed, connected as a DAS
to two other DASs in an FDDI network. (A and B indicate A port and B
port.) When DAS devices are connected on an FDDI ring, A ports must be
connected to B ports, and B ports must be connected to A ports.
Figure 2-1 Dual-attached Configuration
POWER ST
ATUS
ENGINE ST
ATUS
TURBO ST
ATUS
SUPPL
Y
A
SUPPL
Y
B
1.6 Gbps
RESET
PACKET PROCESSING ENGINE
NMS PORT
POWER
FastNET ATX
TX
FDDI MIC A FDDI MIC B OPTICAL BYPASS
RING A RING B
THRU WRAP RX ACT ACT THRU WRAP POWER ST
ATUS
DAS DAS
B A B A
A B
ATX
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