LAN9303 Datasheet, PDF (72/366 Pages) SMSC Corporation – Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
The transmit queue priority is based on the packet type and device configuration as shown in
Figure 6.5. Refer to Section 13.4.3.16, "Switch Engine Global Ingress Configuration Register
(SWE_GLOBAL_INGRSS_CFG)," on page 289 for definitions of the configuration bits.
Get Queue
Packet from Host ^Y
N
DA Highest N
Priority
Y
wait for ALR result
Y _{Use Precedence} N
Y ALR Priority
Enable Bit
N
N
VL Higher
Priority
Y
Use Tag &
Y
Packet is
Tagged
N
Y _{Packet is IPv4/v6}
& Use IP
N
Y _{Packet is IPv4}
N
Use Tag &
Y
Packet is
Tagged
N
Resolved Priority =
ALR Priority
Resolved Priority =
IP Precedence
Resolved Priority =
DIFFSERV[TOS]
Resolved Priority =
DIFFSERV[TC]
Resolved Priority =
Default Priority[Source
Port]
Resolved Priority =
Priority Regen[VLAN
Priority]
Revision 1.3 (08-27-09)
Queue =
Traffic Class[Resolved Priority]
Get Queue Done
Figure 6.5 Switch Engine Transmit Queue Calculation
72
DATASHEET
SMSC LAN9303/LAN9303i