Specifications

A.17 Summary of Important Configuration Features
A–42 FDDI Configuration Capabilities
A.17.9 Self-Contained Tree Configuration
You can build a self-contained tree configuration in the DEChub 900 with eight
FDDI modules. This configuration can be built because it requires only 14 backplane
channels.
A.17.10 Network Module Front Panel Default
The FDDI default on the following modules is to the front panel ports:
• DECswitch 900EF
• DECconcentrator 900FH
• DECconcentrator 900MX
• DECconcentrator 900TH
The FDDI default for the PEswitch 900TX is to the backplane FDDI port. This is
because there are no front panel FDDI ports on the PEswitch 900TX module. This
fact is sometimes overlooked when considering default configurations.
A.17.11 Port Configuration in DEChub ONE-MX
FDDI network modules that are installed in a DEChub ONE-MX can configure their
FDDI ports either with MultiChassis Manager, or via an FDDI port configuration
menu on the DEChub ONE-MX setup port.
A.17.12 Valid FDDI Configurations
Figure A–33 shows a mixture of DEChub types with various DEChub FDDI network
modules to demonstrate the flexibility of the DEChub network products.