Specifications

A.11 FDDI Tree Configuration Examples
A–20 FDDI Configuration Capabilities
Figure A–13 Building Block Representation of Example 2
A.11.3 Example 3 — Tree Connections to an External Concentrator
FDDI trees that are constructed within the hub backplane can connect to an external
higher level concentrator by configuring one of the FDDI network modules with a
front panel S port, and configuring all other FDDI network modules with backplane
M and S ports.
As shown in Figure A–14, a tree of PEswitch 900TX modules can be connected to an
external FDDI ring using either a DECswitch 900EF network module (or a concen-
trator) to make the external connection.
LKG-10077-96F
Non Root
MS
M
Non Root
MS
Non Root
MS
SMSMSS