21
Connecting the Network Cables
Standalone FDDI Networking
Standalone FDDI networking provides either one DAS connection or two SAS
connections without the need for an FDDI backbone. File servers are good
candidates for standalone networking in situations where they can be
removed from an Ethernet segment and attached directly to the FDDI Module.
Doing so can decrease traffic between Ethernet segments and allow the
server(s) to use a full 100Mbit/s bandwidth in which to serve incoming
segments.
Figure 13.
Example of FDDI Standalone Networking with Two SAS Connections
Optical Bypass Switch Connection (Optional)
If your FDDI connection includes an optical bypass switch, use the following
steps to connect the FDDI Module as a DAS to a bypass switch on the FDDI
ring.
1.
Connect the bypass switch to the FDDI ring by plugging the MIC A and
MIC B connectors from the FDDI ring into the corresponding A and B
ports on the bypass switch. (The cable connectors should be keyed so that
they fit into the correct A and B jacks.) For details on connecting to the
ring, refer to the instructions provided with the bypass switch.
2.
Attach the cable with the key labeled “A” from the bypass switch to MIC
A of the FDDI Module in the Switch 2000. Attach the cable with the key
labeled “B” from the switch to MIC B of the FDDI Module. (The cable
connectors should be keyed so that they fit into the correct A and B
connectors.) See figure 14.
3.
Insert the DIN connector on the cable from the bypass switch into the
“Optical Bypass” jack on the FDDI Module. See figure 14.
PC
Server
Unix
NFS
Server
