lan9311 Standard Microsystems Corp., lan9311 Datasheet - Page 73

• Manufacturer Part Number: lan9311
• Description: Lan9311/lan9311i Two Port 10/100 Managed Ethernet Switch With 16-bit Non-pci Cpu Interface
• Manufacturer: Standard Microsystems Corp.

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
The ingress flow calculation is based on the packet type and the device configuration as shown in
Figure
IPv4 Precedence
IPv4(TOS)
IPv6(TC)
VLAN Priority
6.8.
Source Port
Flow Priority =
IP Precedence
Figure 6.8 Switch Engine Ingress Flow Priority Calculation
Figure 6.7 Switch Engine Ingress Flow Priority Selection
Y
Use Precedence
6b
3b
Packet is from Host
2b
VL Higher Priority
Packet is Tagged
3b
Use Precedence
DIFFSERV Table
Packet is IPv 4
Programmable
DIFFSERV[TOS]
VLAN Enable
Flow Priority =
Packet is IP
Programmable
N
Port Default
Use IP
Table
DATASHEET
Y
DIFFSERV[TC]
Packet is IPv 4
Flow Priority =
3b
3b
73
N
Calculation
Priority
N
Y
Default Priority[Source
Get Flow Priority Done
Packet from Host
Packet is IPv 4/v6
Get Flow Priority
Vlan Enable &
Vlan Enable &
Flow Priority =
VL Higher
Packet is
Packet is
& Use IP
Tagged
Tagged
Priority
Port]
N
N
N
N
Y
3b
Y
Y
Y
flow priority
Flow Priority =
VLAN Priority
Revision 1.2 (04-08-08)