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3-14 C
HAPTER
3: I
NSTALLING
M
ODULES
I
NTO
T
HE
MSH C
HASSIS
DUA1800-0AAA04
Port Modules
Two Port Modules are available:
■
4 port FDDI Fiber (MIC) Module
■
6 port FDDI UTP (RJ45) Module
These units provide connections to the FDDI concentator.
FDDI Media Modules
Small modules, similar to the Ethernet transceiver modules, are
available to provide extra connection to a RingBuilder ring. They
fit into the RingBuilder Module.
LinkSwitch Module
LinkSwitch is an FDDI to Ethernet switch module. The module can
be installed in an MSH chassis with or without the FDDI
backplane. When configured as part of a suitable network, the
LinkSwitch can significantly increase LAN workgroup
performance. In particular, LinkSwitch can provide increased
client/server performance in both small and large LAN
applications. LinkSwitch switches traffic from Ethernet segments
to FDDI, or between Ethernet segments, and filters FDDI traffic so
that only frames destined for a particular Ethernet segment are
forwarded to that segment.
LinkSwitch provides full wire rate connectivity between multiple
Ethernet segments and an FDDI network. With low latency and
high performance, LinkSwitch is able to support the busiest
networks.The LinkSwitch module has 4 built-in switch ports: 3
switched connections to the three Ethernet backplanes and a
high-speed fiber FDDI port. Up to two MIC Media Modules can be
connected to a LinkSwitch module to provide single-attached
(SAS), dual-attached DAS) or dual-homed FDDI connections.
Alternatively, the FDDI connection can be across the internal FDDI
bus to an FDDI RingBuilder and its associated ring. This
configuration supports connection to, for example, a local file
server or an FDDI backbone downlink to a server farm. See the
Chassis.bk : CHAPTER3 Page 14 Monday, February 10, 1997 1:11 PM