| Description | On a LS1010 equipped with the Lightstream per-VC
queueing chipset, the
user can define Hierarchical VP-Tunnels. Each such
tunnel has its own dedicated scheduler, programmed
to output data at a configurable maximum rate.
Therefore, the overall output of the Hierarchical
VP-tunnel is rate-limited. In addition, Virtual
Circuits of different service categories can
traverse through such a tunnel, and each of these
Virtual Circuits are guaranteed their individual
contracted bandwidth agreement.
This object must be set to enabled before any
Hierarchical VP-tunnels can be defined on the device.
Any setting of this variable requires a reload
of the device to be effective.
Setting this object to enabled will cause the
software to initialize the additional schedulers
needed by the Hierarchical VP-Tunnels. Other
limited scheduler resources are therefore used by a
larger number of schedulers (as compared to the case
when Hierarchical Scheduling is disabled on the device).
This may result in fewer number of connections
passing Connection Admission Control.
This object is therefore provided so that the
user can make an informed decision as to whether
Hierarchical Scheduling is to be used.
This object is defined on a LS1010 only when
the switch is equipped with the Lightstream
per-VC queueing chipset. |