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Sun Crypto Accelerator 4000 Board Installation and User’s Guide • May 2003
Interrupt Parameters
describes the receive interrupt blanking values.
Random Early Drop Parameters
These parameters provide the ability to drop packets based on the fullness of the
receive FIFO. By default, this feature is disabled. When FIFO occupancy reaches a
specific range, packets are dropped according to the preset probability. The
probability should increase when the FIFO level increases. Control packets are never
dropped and are not counted in the statistics.
receive FIFO. By default, this feature is disabled. When FIFO occupancy reaches a
specific range, packets are dropped according to the preset probability. The
probability should increase when the FIFO level increases. Control packets are never
dropped and are not counted in the statistics.
TABLE 3-7
RX Blanking Register for Alias Read
Field Name
Values
Description
rx-intr-pkts
0 to 511
Interrupts after this number of packets have arrived
since the last packet was serviced. A value of zero
indicates no packet blanking. (Default=3)
since the last packet was serviced. A value of zero
indicates no packet blanking. (Default=3)
rx-intr-time
0 to 524287
Interrupts after 4.5 microseconds (usecs) have elapsed
since the last packet was serviced. A value of zero
indicates no time blanking. (Default=3)
since the last packet was serviced. A value of zero
indicates no time blanking. (Default=3)
TABLE 3-8
RX Random Early Detecting 8-Bit Vectors
Field Name
Values
Description
red-dv4to6k
0 to 255
Random early detection and packet drop vectors for
when FIFO threshold is greater than 4096 bytes and less
than 6,144 bytes. Probability of drop can be
programmed on a 12.5 percent granularity. For
example, if bit 0 is set, the first packet out of every
eight will be dropped in this region. (Default=0)
when FIFO threshold is greater than 4096 bytes and less
than 6,144 bytes. Probability of drop can be
programmed on a 12.5 percent granularity. For
example, if bit 0 is set, the first packet out of every
eight will be dropped in this region. (Default=0)