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Functional Description
01: Address entry. Unicast or multicast determined by address bit 40.
Packet Address (UNICAST_OUI)
For an OUI address, only the upper 24-bits of the address are used in the source or destination address
lookup.
14.3.2.7.1.6 VLAN/Unicast Address Table Entry
Table 14-16. Unicast Address Table Entry Bit Values
71:68 67:66 65 64 63:62 61:60 59:48 47:0
Reserved Port Number Block Secure Unicast Type Entry Type vlan_id Unicast
(00) or (X1) (11) Address
Port Number (PORT_NUMBER)
Port Number – This field indicates the port number (not port mask) that the packet with a unicast
destination address may be forwarded to. Packets with unicast destination addresses are forwarded only
to a single port (but not the receiving port).]
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.
11 – VLAN address entry. Unicast or multicast determined by address bit 40.
VLAN ID (VLAN_ID)
The unique identifier for VLAN identification. This is the 12-bit VLAN ID.
1199
SPRUH73H–October 2011–Revised April 2013 Ethernet Subsystem
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