LAN9313 Datasheet, PDF (75/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
IPv4(TOS)
IPv6(TC)
Packet is from Host
Packet is Tagged
Packet is IPv 4
Packet is IP
VL Higher Priority
Use Precedence
Use IP
VLAN Enable
6b _Programmable
3b
DIFFSERV Table
3b
IPv4 Precedence
2b
Source Port
3b
VLAN Priority
Programmable
Port Default
Table
Priority
3b _Calculation
3b
flow priority
Figure 6.7 Switch Engine Ingress Flow Priority Selection
The ingress flow calculation is based on the packet type and the device configuration as shown in
Figure 6.8.
Y _{Use Precedence} N
Get Flow Priority
Packet from Host ^Y
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
Flow Priority =
IP Precedence
Flow Priority =
DIFFSERV[TOS]
Flow Priority =
DIFFSERV[TC]
Flow Priority =
Default Priority[Source
Port]
Flow Priority =
VLAN Priority
Get Flow Priority Done
Figure 6.8 Switch Engine Ingress Flow Priority Calculation
SMSC LAN9313/LAN9313i
75
DATASHEET
Revision 1.2 (04-08-08)