Specifications

A.3 Tree Configurations
FDDI Configuration Capabilities A–5
A.3 Tree Configurations
When connected in a tree configuration, front panel ports and backplane ports are
assigned a tree port (M port or S port) by management.
MultiChassis Manager users can assign a tree port using the Station Configuration
window. Any SNMP based management software can be used.
A.3.1 Tree Port Configuration Examples
Figure A–2 shows the tree port configurations that can be management assigned.
Figure A–2 Tree Port Configurations
A.3.2 Dual Homed Configuration
In Figure A–2, note the fifth configuration with an M port in the backplane, and A
and B ports on the front panel. This configuration is only implemented in concentra-
tors and is used for connecting to a dual ring, or in a dual homed configuration.
Also, note that when the user accessible FDDI ports are reconfigured as tree ports,
the A port always becomes an M port and the B port always becomes an S port. This
is true for either front panel ports or ModPMD ports in a DEChub ONE-MX docking
station.
Backplane Ports
LKG-10064-95F
Front Panel Ports
MS M
A
SB
MSM MS