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VSC7511 Datasheet(PDF) 126 Page - Microsemi Corporation |
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VSC7511 Datasheet(HTML) 126 Page - Microsemi Corporation |
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126 / 324 page  Functional Descriptions VMDS-10488 VSC7511 Datasheet Revision 4.2 111 The following table lists the registers associated with the DMAC analysis step. The (DMAC, VID) pair is looked up in the MAC table. A match is found when the (DMAC, VID) pair matches that of an entry. If a match is found, the entry is returned and DEST is determined based on the MAC table entry. For more information, see MAC Table, page 101. If an entry is found in the MAC table entry of ENTRY_TYPE 0 or 1 and the CPU port is set in the PGID pointed to by the MAC table entry, CPU extraction queue PGID.DST_PGID is added to the CPUQ. If an entry is not found for the (DMAC, VID) in the MAC table, the frame is flooded. The forwarding decision is set to one of the seven flooding masks defined in ANA::FLOODING or ANA::FLOODING_IPMC, based on one of the flood type definitions listed in the following table. Table 84 • DMAC Analysis Registers Register Description Replication FLOODING.FLD_UNICAST Index into the PGID table used for flooding of unicast frames. None FLOODING.FLD_BROADCAST Index into the PGID table used for flooding of broadcast frames. None FLOODING.FLD_MULTICAST Index into the PGID table used for flooding of multicast frames, not flooded by the IPMC flood masks. None FLOODING_IPMC.FLD_MC4_CTRL Index into the PGID table used for flooding of IPv4 multicast control frames. None FLOODING_IPMC.FLD_MC4_DATA Index into the PGID table used for flooding of IPv4 multicast data frames. None FLOODING_IPMC.FLD_MC6_CTRL Index into the PGID table used for flooding of IPv6 multicast control frames. None FLOODING_IPMC.FLD_MC6_DATA Index into the PGID table used for flooding of IPv6 multicast data frames. None PGID[63:0] Destination and flooding masks table. 64 AGENCTRL. IGNORE_DMAC_FLAGS Controls the use of MAC table flags from (DMAC, VID) entry and flooding flags. None CPUQ_CFG Configuration of CPU extraction queues None Table 85 • Forwarding Decisions Based on Flood Type Frame Type Condition IPv4 multicast data DMAC = 0x01005E000000 to 0x01005E7FFFFF EtherType = IPv4 IP protocol is not IGMP IPv4 DIP outside 224.0.0.x IPv6 multicast data DMAC = 0x333300000000 to 0x3333FFFFFFFFF EtherType = IPv6 IPv6 DIP outside 0xFF02::/16 IPv4 multicast control DMAC = 0x01005E000000 to 0x01005E7FFFFF EtherType = IPv4 IP protocol is not IGMP IPv4 DIP inside 224.0.0.x |
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