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Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
September 2006 DM
Order Number: 252480-006US 439
Ethernet MAC A—Intel
®
IXP42X product line and IXC1100 control plane processors
15.2.30 Address Mask 6
15.2.31 Address Registers
Six registers that make up the 48 bit Address Mask are:
• Address Mask[47:40] — Address Mask 1
• Address Mask[39:32] — Address Mask 2
• Address Mask[31:24] — Address Mask 3
• Address Mask[23:16] — Address Mask 4
• Address Mask[15:8] — Address Mask 5
• Address Mask[7:0] — Address Mask 6
Example: Address Mask is 00-A0-24-D1-7F-02
• Address Mask 1 = 0x00
• Address Mask 2 = 0x00
• Address Mask 3 = 0x00
• Address Mask 4 = 0xFF
• Address Mask 5 = 0xFF
• Address Mask 6 = 0x00
The detailed bit descriptions follow the six registers’ bit maps.
Register Name: addrmask6
Hex Offset Address: 0x C80090B4 Reset Hex Value: 0x00000000
Register
Description:
Address Mask Register #1. Sixth register of six that makes up the Address Mask. Address Mask is used
with Address for multicast address filtering. Bits set to 1 in Address Mask represent bits of the Address
Register that must match the corresponding bits in incoming destination addresses for packets to be
accepted.
Access: Read/Write.
31 87 0
(Reserved) ADDRESS MASK [47:40]
Register Address Mask
Bits Name Description
47:0
Address
Mask1-6
Address Mask 1-6 is used with Address 1-6 for multicast address filtering. Bits
set to 1, in Address Mask, represent bits of the Address Register that must
match the corresponding bits in incoming destination addresses for packets to
be accepted.