KSZ8864RMNI MICREL [Micrel Semiconductor], KSZ8864RMNI Datasheet - Page 85

• Manufacturer Part Number: KSZ8864RMNI
• Description: Integrated 4-Port 10/100 Managed Switch with Two MACs MII or RMII Interfaces
• Manufacturer: MICREL [Micrel Semiconductor]

September 2011
Static MAC Address Table
KSZ8864RMN has a static and a dynamic address table. When a DA look-up is requested, both tables will be
searched to make a packet forwarding decision. When an SA look-up is requested, only the dynamic table is
searched for aging, migration, and learning purposes. The static DA look-up result will have precedence over the
dynamic DA look-up result. If there are DA matches in both tables, the result from the static table will be used. The
static table can only be accessed and controlled by an external SPI master (usually a processor). The entries in the
static table will not be aged out by KSZ8864RMN. An external device does all addition, modification and deletion.
Note:
Register bit assignments are different for static MAC table reads and static MAC table write, as shown in the two tables below.
Address
Format of Static MAC Table for Reads (32 entries)
63-57
56
55
54
53
52-48
47-0
Format of Static MAC Table for Writes (32 entries)
62-56
55
54
53
Name
FID
Use FID
Reserved
Override
Valid
Forwarding Ports
MAC Address (DA)
FID
Use FID
Override
Valid
Description
Filter VLAN ID, representing one of the 128 active
VLANs
1, use (FID+MAC) to look-up in static table.
0, use MAC only to look-up in static table.
Reserved.
1, override spanning tree “transmit enable = 0” or
“receive enable = 0* setting. This bit is used for
spanning tree implementation.
0, no override.
1, this entry is valid, the look-up result will be used.
0, this entry is not valid.
The 5 bits control the forward ports, example:
00001, Reserved
00010, forward to Port 1
…..
10000, forward to Port 4
00110, forward to Port 1 and Port 2
11111, broadcasting (excluding the ingress port)
48 bit MAC address.
Filter VLAN ID, representing one of the 128 active
VLANs.
1, use (FID+MAC) to look-up in static table.
0, use MAC only to look-up in static table.
1, override spanning tree “transmit enable = 0” or
“receive enable = 0” setting. This bit is used for
spanning tree implementation.
0, no override.
1, this entry is valid, the look-up result will be used.
0, this entry is not valid.
85
Mode
RO
RO
RO
RO
RO
RO
RO
W
W
W
W
M9999-092011-1.4
0000000
0000000
Default
00000
N/A
0x0
0
0
0
0
0
0