ZL50418GKC ZARLINK [Zarlink Semiconductor Inc], ZL50418GKC Datasheet - Page 25

• Manufacturer Part Number: ZL50418GKC
• Description: Managed 16-Port 10/100 M + 2-Port 1 G Ethernet Switch
• Manufacturer: ZARLINK [Zarlink Semiconductor Inc]

Each VIX represents the mapping result from the associated VLAN ID (VLANID = 0x004 is mapped to VIX4).
Unused VLAN ID’s have their corresponding VIX programmed to hexadecimal 00. Used VLAN ID’s have Their
corresponding VIX programmed to hexadecimal 01 through FF. In other words, 255 VLAN’s are supported. The VIX
value is a pointer to the entries in the VLAN Index port association table (internal memory).
The VLAN Index port association table is used by both software and hardware. It contains 256 entries. Each entry
has 19 fields, such that each field represents the port status of that particular VLAN.
Each entry has 64 bits. Each port has a VLAN status field with the following two bits values:
Note: The VLAN aging time is controlled by register 402h.
5.4
The ZL50418's implementation of intelligent traffic switching provides filters for source and destination MAC
addresses. This feature filters unnecessary traffic, thereby providing intelligent control over traffic flows and
broadcast traffic.
MAC address filtering allows the ZL50418 to block an incoming packet to an interface when it sees a specified MAC
address in either the source address or destination address of the incoming packet. For example, if your network is
congested because of high utilization from a MAC address, you can filter all traffic transmitted from that address
and restore network flow, while you troubleshoot the problem.
E
N
T
R
E
S
I
- 00: Port not a member of VLAN
- 01: Port is a member of VLAN, and is subject to aging (Do not use. Used by the aging module)
- 10: Port is a member of VLAN, and is subject to aging
- 11: Port is a member of VLAN, and is not subject to aging
MAC Address Filtering
VIX4095
Port
VIX7
255
Bit
0
1
…
…
:
:
Not Used
63 to 54
VIX4094
VIX6
…
…
53 52
G1
Table 3 - VLAN Index Port Association Table
VIX4093
VIX5
Table 2 - VLAN Index Mapping Table
…
…
51 50
G0
Zarlink Semiconductor Inc.
VIX4092
49 48
CPU
VIX4
…
…
ZL50418
31 30
25
P15
VIX4091
VIX3
…
…
29 28
P14
VIX4090
……
VIX2
…
…
7 6
P3
VIX4089
VIX1
…
…
5 4
P2
3
P1
VIX4088
Data Sheet
VIX0
2
…
…
1
P0
0