ZL50404
5.8
Priority Classification Rule
Data Sheet
Figure 7 shows the ZL50404 priority classification rule.
Fix Port Priority?
No
Yes
Use Default port settings
TOS Precedence over VLAN?
(QOSC Register bit 5)
No
Yes
Yes
Use VLAN
priority
VLAN Tag?
No
Yes
No
IP Frame?
Yes
No
Use TOS
IP Frame?
No
Use Default port settings
Use Logical Port?
Yes
Use logical port
Figure 7 - Priority Classification Rule
5.9
Port Based VLAN
An administrator can use the PVMAP Registers to configure the ZL50404 for port-based VLAN (see “Register
Definition” on page 52). For example, ports 1-3 might be assigned to the Marketing VLAN, ports 4-6 to the
Engineering VLAN, and ports 7-9 to the Administrative VLAN. The ZL50404 determines the VLAN membership of
each packet by noting the port on which it arrives. From there, the ZL50404 determines which outgoing port(s)
is/are eligible to transmit each packet, or whether the packet should be discarded.
Destination Port Numbers Bit Map
Port Registers
Register for Port #0
PVMAP00_0[7:0] to PVMAP00_1[1:0]
Register for Port #1
PVMAP01_0[7:0] to PVMAP01_1[1:0]
Register for Port #2
PVMAP02_0[7:0] to PVMAP02_1[1:0]
…
Register for Port #9
PVMAP09_0[7:0] to PVMAP09_1[1:0]
0
0
0
0
9
0
0
0
…
2
1
1
0
1
1
0
0
0
0
1
0
Table 6 - Port-Based VLAN Mapping
32
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
