zl50411 Zarlink Semiconductor, zl50411 Datasheet - Page 100

• Manufacturer Part Number: zl50411
• Description: Managed 9-port Fast Ethernet Switch With Private Vlan
• Manufacturer: Zarlink Semiconductor

12.3.6.21
I²C Address: h0BB; CPU Address: h0558
Accessed by CPU and I²C (R/W)
User Defined Logical Ports and Well Known Ports
The ZL50411 supports classifying packet priority through layer 4 logical port information. It can be setup by 8 Well
Known Ports, 8 User Defined Logical Ports, and 1 User Defined Range. The 8 Well Known Ports supported are:
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Their
WELL_KNOWN_PORT[_ENABLE can individually turn on/off each Well Known Port if desired.
Similarly, the User Defined Logical Port provides the user programmability to the priority, plus the flexibility to select
specific logical ports to fit the applications. The 8 User Logical Ports can be programmed via User_Port 0-7
registers. Two registers are required to be programmed for the logical port number. The respective priority can be
programmed to the User_Port [7:0] priority register. The port priority can be individually enabled/disabled via
User_Port_Enable register.
The User Defined Range provides a range of logical port numbers with the same priority level. Programming is
similar to the User Defined Logical Port. Instead of programming a fixed port number, an upper and lower limit need
to be programmed, they are: {RHIGHH, RHIGHL} and {RLOWH, RLOWL} respectively. If the value in the upper limit
is smaller or equal to the lower limit, the function is disabled. Any IP packet with a logical port that is less than the
upper limit and more than the lower limit will use the priority specified in RPRIORITY.
23
512
6000
443
111
22555
22
554
respective
Bit [0]:
Bit [1]:
Bit [2]:
Bit [3]:
Bit [4]:
Bit [5]:
Bit [6]:
Bit [7]:
USER_PROTOCOL_FORCE_DISCARD – User Define Protocol 0~7 Force Discard
priority
Enable Protocol 0 Force Discard
1 – Enable
0 – Disable
Enable Protocol 1 Force Discard
Enable Protocol 2 Force Discard
Enable Protocol 3 Force Discard
Enable Protocol 4 Force Discard
Enable Protocol 5 Force Discard
Enable Protocol 6 Force Discard
Enable Protocol 7 Force Discard
can
be
programmed
Zarlink Semiconductor Inc.
ZL50411
100
via
WELL_KNOWN_PORT[7:0]_PRIORITY
Data Sheet
register.