Functional Description
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Block (BLOCK)
Block – The block bit indicates that a packet with a matching source or destination address should be
dropped (block the address).
0 – Address is not blocked.
1 – Drop a packet with a matching source or destination address (secure
must be zero)
If block and secure are both set, then they no longer mean block and secure. When both are set, the
block and secure bits indicate that the packet is a unicast supervisory (super) packet and they determine
the unicast forward state test criteria. If both bits are set then the packet is forwarded if the receive port is
in the Forwarding/Blocking/Learning state. If both bits are not set then the packet is forwarded if the
receive port is in the Forwarding state.
Secure (SECURE)
Secure – This bit indicates that a packet with a matching source address should be dropped if the
received port number is not equal to the table entry port_number.
0 – Received port number is a don’t care.
1 – Drop the packet if the received port is not the secure port for the source
address and do not update the address (block must be zero)
Unicast Type (UNICAST_TYPE)
Unicast Type – This field indicates the type of unicast address the table entry contains.
00 – Unicast address that is not ageable.
01 – Ageable unicast address that has not been touched.
10 – OUI address - lower 24-bits are don’t cares (not ageable).
11 – Ageable unicast address that has been touched.
Table Entry Type (ENTRY_TYPE)
Address entry. Unicast or multicast determined by address bit 40.
01: Address entry. Unicast or multicast determined by address bit 40.
Packet Address (UNICAST_ADDRESS)
This is the 48-bit packet MAC address. All 48-bits are used in the lookup.
14.3.2.7.1.5 OUI Unicast Address Table Entry
Table 14-15. OUI Unicast Address Table Entry Bit Values
71:64 63:62 61:60 59:48 47:24 23:0
Reserved Unicast Type (10) Entry Type (01) Reserved Unicast OUI Reserved
Unicast Type (UNICAST_TYPE)
Unicast Type – This field indicates the type of unicast address the table entry contains.
00 – Unicast address that is not ageable.
01 – Ageable unicast address that has not been touched.
10 – OUI address - lower 24-bits are don’t cares (not ageable).
11 – Ageable unicast address that has been touched.
Table Entry Type (ENTRY_TYPE)
Address entry. Unicast or multicast determined by address bit 40.
1198
Ethernet Subsystem SPRUH73H–October 2011–Revised April 2013
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