LAN9353 Datasheet, PDF (218/523 Pages) Microchip Technology – Interfaces at up to 200Mbps via Turbo MII

LAN9353
The ingress flow calculation is based on the packet type and the device configuration as shown in Figure 10-6.
FIGURE 10-6:
SWITCH ENGINE INGRESS FLOW PRIORITY CALCULATION
Get Queue
Packet from Host ^Y
N
DA Highest
N
Priority
Y
wait for ALR result
Y _{Use Precedence} N
Y _{Packet is IPv4}
N
Y
ALR
Priority Enable
Bit
N
N
VL Higher
Priority
Y
Use
Y
Tag & Packet is
Tagged
N
Y _{Packet is IPv4/v6}
& Use IP
N
Use
Y
Tag & Packet is
Tagged
N
N
Packet is
Y
Broadcast
Flow Priority =
ALR Priority
Flow Priority =
IP Precedence
Flow Priority =
DIFFSERV[TOS]
Flow Priority =
DIFFSERV[TC]
Flow Priority =
Default
Priority[Source Port]
Flow Priority =
Default BC
Priority[Source Port]
Flow Priority =
Priority Regen[VLAN
Priority]
Get Flow Priority Done
DS00001925A-page 218
 2015 Microchip Technology Inc.