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KSZ8873MLLJ Datasheet(PDF) 84 Page - Micrel Semiconductor |
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KSZ8873MLLJ Datasheet(HTML) 84 Page - Micrel Semiconductor |
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84 / 108 page 
Micrel, Inc. KSZ8873MLLJ September 2011 84 M9999-091911-1.8 Static MAC Address Table The KSZ8873 supports both a static and a dynamic MAC address table. In response to a Destination Address (DA) look up, the KSZ8873 searches both tables to make a packet forwarding decision. In response to a Source Address (SA) look up, only the dynamic table is searched for aging, migration and learning purposes. The static DA look up result takes precedence over the dynamic DA look up result. If there is a DA match in both tables, the result from the static table is used. The entries in the static table will not be aged out by the KSZ8873. The static table is accessed by a external processor via the SMI, SPI or I2C interfaces. The external processor performs all addition, modification and deletion of static MAC table entries. Bit Name R/W Description Default 57-54 FID R/W Filter VLAN ID – identifies one of the 16 active VLANs 0000 53 Use FID R/W =1, Use (FID+MAC) for static table look ups =0, Use MAC only for static table look ups 0 52 Override R/W =1, Override port setting “transmit enable=0” or “receive enable=0” setting =0, No override 0 51 Valid R/W =1, This entry is valid, the lookup result will be used =0, This entry is not valid 0 50-48 Forwarding Ports R/W These 3 bits control the forwarding port(s): 001, forward to port 1 010, forward to port 2 100, forward to port 3 011, forward to port 1 and port 2 110, forward to port 2 and port 3 101, forward to port 1 and port 3 111, broadcasting (excluding the ingress port) 000 47-0 MAC Address R/W 48-bit MAC Address 0x0000_0000_000 0 Table 11. Format of Static MAC Table (8 Entries) |
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