MVTX2801
Data Sheet
This broadcast and multicast rate defines for each port the number of incoming packet allowed to be forwarded
within a specified time. Once the packet rate is reached, packets will be dropped. To turn off the rate limit, program
the field to 0.
Bit [3:0]:
Bit [7:4]:
•
•
Multicast Rate Control Number of multicast packets allowed within the time
defined in bits 6 to 4 of the Flooding Control Register (FCR). (Default 0).
Broadcast Rate Control Number of broadcast packets allowed within the time
defined in bits 6 to 4 of the Flooding Control Register (FCR). (Default 0)
10.6.13 UCC - Unicast Congestion Control
2
I C Address h04A, Serial Interface Address:h50C
2
Accessed by serial interface and I C (R/W)
7
0
Unicast congest threshold
Bit [7:0]:
•
Number of frame count. Used for best effort dropping at B% when destination port's best
effort queue reaches UCC threshold and shared pool is all in use. Granularity 16 frame.
(Default: h07)
10.6.14 MCC - Multicast Congestion Control
2
I C Address h0B7, Serial Interface Address:h50D
2
Accessed by serial interface and I C (R/W)
7
5
4
3
0
FC reaction prd
Multicast congest threshold
Bit [3:0]:
•
In multiples of two. Used for triggering MC flow control when destination port's best effort
queue reaches MCC threshold. (Default 5'h08)
Bit [4]:
•
•
Must be 0
Bit [7:5]:
Flow control reaction period. ([7:5] 4)+3 usec (Default 3'h2).
10.6.15 PRG - Port Reservation for Giga ports
2
I C Address h0B9, Serial Interface Address:h50F
2
Accessed by serial interface and I C (R/W)
7
4
3
0
Buffer low thd
Per source buffer Reservation
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Zarlink Semiconductor Inc.
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