zl50411 Zarlink Semiconductor, zl50411 Datasheet - Page 41
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zl50411
Manufacturer Part Number
zl50411
Description
Managed 9-port Fast Ethernet Switch With Private Vlan
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50411.pdf
(143 pages)
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5.8
Figure 10 shows the ZL50411 priority classification rule.
5.9
The ZL50411 supports two models for determining and controlling how a packet gets assigned to a VLAN: port
priority and tag -based VLAN.
5.9.1
An administrator can use the PVMAP Registers to configure the ZL50411 for port-based VLAN (see “Register
Definition” on page 62). 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 ZL50411 determines the VLAN membership of
each packet by noting the port on which it arrives. From there, the ZL50411 determines which outgoing port(s)
is/are eligible to transmit each packet, or whether the packet should be discarded.
Priority Classification Rule
Port and Tag Based VLAN
Use VLAN
priority
Port-Based VLAN
Yes
TOS Precedence over VLAN?
Use Default port settings
(QOSC Register bit 5)
Fix Port Priority?
Figure 10 - Priority Classification Rule
VLAN Tag?
IP Frame?
No
No
No
No
Zarlink Semiconductor Inc.
ZL50411
Yes
41
Yes
No
Yes
Use Default port settings
Use logical port
Use Logical Port?
IP Frame?
Yes
Yes
No
Use TOS
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