Cabletron Systems HSIM-F6 - Manual (Page 41)

The Ring Map Configuration Screen
HSIM-F6 User’s Guide 3-17
3.7.1 Ring Map Configuration Screen Fields
The Ring Map Configuration screen displays the addresses and sequence
of each FDDI device attached to the ring. When first displayed, the station
at the upper left corner of the ring is this station (HSIM-F6). The Ring
Map Configuration screen displays node class, node address, and twisted
and/or wrapped conditions (T for twisted and/or W for wrapped) in
parentheses. The following list provides the node class possibilities:
NAS - (Null Attached Station) Isolated station; station not connected to
an FDDI Ring.
DAS - (Dual Attached Station) Station does not support M (Master)
ports, but does connect directly to an FDDI primary and secondary ring
using A and B ports.
DAC - (Dual Attached Concentrator) Station that supports M (Master)
ports and provides access for multiple stations. A DAC connects directly
to an FDDI ring using A and B ports.
SAS - (Single Attached Station) Station that accesses the primary ring
only, via a concentrator.
SAC - (Single Attached Concentrator) Station that accesses the primary
ring only and provides access for multiple Single Attached Stations
(SAS). Single Attached Concentrators provide the same services as
DACs, but without the redundancy of the dual ring topology.
NOTES
While Local Management updates the ring map, for example,
during a ring topology change, the screen displays
??-??-??-??-??-?? to illustrate an undetermined address. You
cannot use the scroll commands until Local Management
finishes rebuilding the map.
The Ring Map display stops at the first occurrence of an
undetermined address, and does not display any known
information beyond this point.