General DataComm Xedge 6000 Series, Установка оборудования

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Switch Fabric and V6.2 Controllers Switch Fabric Setup
3-10 Xedge 6000 Hardware 032R440-000
Installation & Setup Guide Issue 17
Special Considerations
• Setting Priority Mode (J2)
For normal operation, set JP2 to the upper position (High Mode) to ensure the high priority cells
are always sent before low priority cells. Be aware that if most of the traffic is high priority, the
low priority cells may never get delivered because there will always be high priority cells to
process. In this situation, set JP2 to the lower position (High/Low Mode) to ensure that cells in
both queues are processed alternately.
• Setting XH/XP Mode
Jumpers JP1, JP3 and JP4 are codependent. As shown in
Table 3-5
, set 50 MHz with XH (normal
operation) or 25 MHz with XP (XP emulation).
Table 3-4 XH/XS Switch Fabric Jumper Settings
Jumper Position Setting Description
JP1
(See
Table 3-5 )
Upper 25 MHz Required for 25 MHz operation (XP emulation)
Lower 50 MHz Required for 50 MHz operation (Normal operation)
JP2 Upper High
Mode High priority cells have preference over low priority cells. Cells
in the low priority queue are only sent when the high priority
queue is empty. (Normal operation)
Lower High/Low
Mode Low priority cells and high priority cells are equal.
Both queues are examined alternately.
JP3
(See
Table 3-5 )
Upper XP Mode Sets fabric for XP emulation (25 MHz)
Lower XH Mode Sets fabric for XH operation (Normal)
JP4
(See
Table 3-5 )
Upper 50 MHz Required for 50 MHz operation (XH mode)
Lower 25 MHz Required for 25 MHz operation (XP emulation)
Table 3-5 Setting Jumpers for XH/XP Mode
JP1 Position JP2 Position JP3 Position JP4 Position
For XP Mode at 25 MHz Upper Either position
(See
Table 3-4
)
Upper Lower
For XH Mode at 50 MHz Lower Lower Upper