LAN9311 Datasheet, PDF (68/461 Pages) SMSC Corporation – Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
The transmit queue priority is based on the packet type and device configuration as shown in
Figure 6.5. Refer to Section 14.5.3.16, "Switch Engine Global Ingress Configuration Register
(SWE_GLOBAL_INGRSS_CFG)," on page 385 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 Static Bit}
N
N
VL Higher
Priority
Y
VLAN Enable & _Y
Packet is
Tagged
N
Y _{Packet is IPv 4/v6}
& Use IP
N
Y _{Packet is IPv 4}
N
VLAN Enable & _Y
Packet is
Tagged
N
Resolved Priority =
IP Precedence
Resolved Priority =
DIFFSERV[TOS]
Resolved Priority =
DIFFSERV[TC]
Resolved Priority =
Default Priority[Source
Port]
Resolved Priority =
Priority Regen[VLAN
Priority]
Queue =
ALR Priority
Queue =
Traffic Class[Resolved Priority]
Revision 2.0 (02-14-13)
Get Queue Done
Figure 6.5 Switch Engine Transmit Queue Calculation
68
DATASHEET
SMSC LAN9311/LAN9311i