Setup guide

9-8
EPC Connecting Guide
Cabling Instructions
Dual homing configuration provides two attachments to FDDI network. One of them
functions as a backup link if the primary link fails. This type of attachment is especially
useful for connecting to mission–critical devices.
The hub chassis provides slots for one management module (required) and three media
modules.
The LinkBuilder FDDI Management Module must be inserted in slot 0. This module provides
management and configuration functions through a console interface. Access to this
interface is eitheir by a 9–pin RS–232C console serial port for a terminal or modem
connection or via TCP telnet protocol connection over the network.
If there are two serial ports left on the Console Concentrator, you can wire an RS–232 cable
(CBLG106–2000) with a 9–pin RS–232C adapter (CBL1912) between the Console
Concentrator (CS/2600) of the Powercluster and the RS–232 console serial port on each
FDDI hub. These cables come with the Console Concentrator.
Three media modules are currently available. Each module can be placed in any slot, but
the modules must be installed from the bottom up, beginning with slot 1.
Note: Do not leave empty slots between modules.
The two leftmost ports of modules installed in slot 1 can be configured; these two ports are
designated as attachment ports.
The attachment ports can be configured as B and A, S and M, or M and M. The remaining
two ports are M ports by default. If some modules are in slot 2 or 3, all ports are
automatically configured as M ports:
• B/A configuration corresponds to dual attachment or to dual homing attachment.
• S/M configuration corresponds to single attachment,
• M/M configuration corresponds to null attachment.
The cabling diagrams shows the Link Builder FDDI hub with the management module and
three Fibre media port module. These figures shows also the configuration ports for dual
homing (ports configuration is written inside each port).
Between the Two Hubs
Connect the port B from the first hub to the port A from the second hub
Connect the port A from the first hub to the port B from the second hub.
Between the Nodes and Hubs
Each node is configured with dual ring adapter, therefore the cable coming from the ”A” card
must be connected to one hub and the cable coming from the ”B” card must be connected
to the other hub. Each cable coming from a node is plugged in a M port.
Regarding FDDI adapter installation, please refer to the Bull documentation:
FDDI Adapter – Installation and Configuration Guide. Cedoc reference 86 A1 53GX.