lan9313 Standard Microsystems Corp., lan9313 Datasheet - Page 74
lan9313
Manufacturer Part Number
lan9313
Description
Lan9313/lan9313i Three Port 10/100 Managed Ethernet Switch With Mii
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9313.pdf
(398 pages)
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Revision 1.2 (04-08-08)
6.4.6.1
CIR Setting
1610
4028
8056
160
402
804
0-3
12
19
39
79
4
5
6
7
9
After each packet is received, the bucket is decremented. If the Committed Burst bucket has sufficient
tokens, it is debited and the packet is colored Green. If the Committed Burst bucket lacks sufficient
tokens for the packet, the Excess Burst bucket is checked. If the Excess Burst bucket has sufficient
tokens, it is debited, the packet is colored Yellow and is subjected to random discard. If the Excess
Burst bucket lacks sufficient tokens for the packet, the packet is colored Red and is discarded.
Note: All of the token buckets are initialized to the default value of 1536. If lower values are
Refer to
descriptions.
Ingress Flow Calculation
Based on the flow monitoring mode, an ingress flow definition can include the ingress priority. This is
calculated similarly to the transmit queue with the exception that the Priority Regeneration and the
Traffic Class table are not used. As shown in
The precedence bits in the IPv4 TOS octet
The DIFFSERV mapping table indexed by the IPv4 TOS octet or the IPv6 Traffic Class octet
The VLAN tag priority field (but not through the per port Priority Regeneration table)
The port default
programmed into the CBS and EBS parameters, the token buckets will need to be normally
depleted below these values before the values have any affect on limiting the maximum value
of the token buckets.
Section 13.3.3.25, on page 339
Time Per Byte
161140 nS
16100 nS
32220 nS
80580 nS
1600 nS
3220 nS
8060 nS
Table 6.3 Typical Ingress Rate Settings
100 nS
120 nS
140 nS
160 nS
200 nS
260 nS
400 nS
800 nS
80 nS
DATASHEET
through
74
Figure
Section 13.3.3.29, on page 344
6.7, the priority can be based on:
Three Port 10/100 Managed Ethernet Switch with MII
Bandwidth
100 Mbps
500 Kbps
250 Kbps
100 Kbps
2.5 Mbps
80 Mbps
67 Mbps
57 Mbps
50 Mbps
40 Mbps
31 Mbps
20 Mbps
10 Mbps
50 Kbps
5 Mbps
1 Mbps
SMSC LAN9313/LAN9313i
for detailed register
Datasheet
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