Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
Field (Bits)
Description
RX_CLP_BEFORE_EPD_ENABL
1
Enable CLP before EPD dropping. When this feature is enabled, CLP=1
cells are dropped at the queue depth defined by the appropriate the code-
point one below that defined in RX_xxx_EXP_CONG_QD triggering
PTD (Packet Tail Dropping). CLP=0 cells are considered for dropping
by the EPD algorithm at the queue depth defined by
RX_xxx_EXP_CONG_QD.
E
(20)
0
1
Disable CLP before EPD dropping.
RX_HYSTERESIS_DISABLE
(19)
Disable RX DIR, SCG, and SC congestion hyteresis. This setting
declares that congestion is relieved when the queue depth drops below
the queue depth defined by the appropriate RX_xxx_EXP_CONG_QD.
This setting might achieve higher throughput in cases where the incom-
ing traffic characteristics are less bursty.
0
Enable RX DIR, SCG, and SC congestion hysteresis. This setting
declares that congestion is relieved when the queue depth drops below
the queue depth defined by the appropriate the codepoint one below that
defined in RX_xxx_EXP_CONG_QD. This is a more robust setting
which forces the switch to make the most of each dropping event at the
expense of access to cell buffers in the steady state.
124
PMC [ PMC-SIERRA, INC ]
