Справочник Пользователя для Cabletron Systems STHI
The Chassis Status View Screen
Page 5-15
•
OPERATIONAL
(read-only) lists each port’s operational status.
•
ADMINISTRATIVE
allows the user to enable/disable ports and to
place entire hubs in bypass mode.
•
RING OUT ENABLE
allows the user to set TCU ports to station or Ring
Out operational configurations.
The roles of these modes are discussed further in the following sections
regarding port fields and multiplexer fields.
regarding port fields and multiplexer fields.
Use the toggling command field in the center of the screen command line
to select the screen mode.
to select the screen mode.
5.6.2
Multiplexer Configuration Fields
All hubs in an STH/STHI stack are interconnected to form a single Token
Ring LAN, logically organized and represented on the LM screen
(Figure 5-7, page 5-14) as a string of left/right neighbors. The multiplexer
fields on the multiplexer line indicate the state of each hub’s connection to
the common Token Ring LAN that interconnects all hubs in the stack. In
Ring LAN, logically organized and represented on the LM screen
(Figure 5-7, page 5-14) as a string of left/right neighbors. The multiplexer
fields on the multiplexer line indicate the state of each hub’s connection to
the common Token Ring LAN that interconnects all hubs in the stack. In
OPERATIONAL
and
RING OUT ENABLE
modes, the multiplexer fields are
read-only, but in
ADMINISTRATIVE
mode, all multiplexer fields become
toggle fields, allowing the user to manipulate the connections between
hubs in the stack.
hubs in the stack.
The multiplexer field allows the user to bypass individual hubs from the
stack’s common ring. A bypassed hub operates as its own local ring,
providing interconnectability for all of its TCU ports, but not permitting
data contact with the stack’s common ring. If the STHI is bypassed, its
ring-monitoring functionality continues to serve the stack’s common ring,
rather than the STHI’s bypassed ring. Also, if the STHI is bypassed, its
TPIM ports continue to provide access to the stack’s common ring.
stack’s common ring. A bypassed hub operates as its own local ring,
providing interconnectability for all of its TCU ports, but not permitting
data contact with the stack’s common ring. If the STHI is bypassed, its
ring-monitoring functionality continues to serve the stack’s common ring,
rather than the STHI’s bypassed ring. Also, if the STHI is bypassed, its
TPIM ports continue to provide access to the stack’s common ring.
Multiplexer field symbols are defined below. Left/right connections are
not user-configurable through LM; they are determined by the physical
configuration of the interconnect cables between the STHI and any STH
hubs. Only the bypass setting is user-configurable. Toggle the multiplexer
field to select the bypass setting for each hub.
not user-configurable through LM; they are determined by the physical
configuration of the interconnect cables between the STHI and any STH
hubs. Only the bypass setting is user-configurable. Toggle the multiplexer
field to select the bypass setting for each hub.
The following multiplexer status symbols may appear.
<–––>
Attached left/right - This STH is connected to the stack’s
common ring. The ring connection is continued by neighbor
hubs in both directions.
common ring. The ring connection is continued by neighbor
hubs in both directions.