L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 76

• Manufacturer Part Number: L-ET4148-50C-DB
• Manufacturer: LSI

Specifications of L-ET4148-50C-DB

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ET4148-50
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
Appendix A: Registers
Acl_Ip_Key_Table_0
Description: This table performs the first stage of IP address look-up.
Table 54. Acl_Ip_Key_Table_0 Register Parameters
Table 55. Acl_Ip_Key_Table_0 Field Parameters
This first stage of IP address look-up utilizes just a single record. Either three IPv4 address keys or one IPv6
address key is stored here. The comparisons result in an index computation. For IPv4, one of four index values are
chosen. For IPv6, one of two index values are chosen. In both cases, these index values are used to address
records in the next stage of the look-up.
76
Base Address
Register Size
Register Instances
Register Spacing
Record Size
Record Instances
Record Spacing
ipv4_key_{0..2}[31:0]
ipv6_key[127:0]
12
0
4
8
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
0
Parameter
1
Field Name
2
3
4
5
6
7
Figure 45. Acl_Ip_Key_Table_0 Register Diagram
(continued)
8
0x0004_24e0
9
Value
10
NA
NA
16
16
1
1
Spacing = 4.0
Instances = 3
Instances = 1
Mode = R/W
Mode = R/W
Parameters
Offset = 0.0
Offset = 0.0
11
Agere Systems - Proprietary
ipv4_key_0[31:0] or ipv6_key[127:96]
ipv4_key_1[31:0] or ipv6_key[95:64]
ipv4_key_2[31:0] or ipv6_key[63:32]
12
13
14
ipv6_key[31:0]
15
16
A set of 32-bit IPv4 address values. These values
are compared against the search argument. The
results of these comparisons are used to select one
of four index values for use in the next stage of the
look-up.
A 128-bit IPv6 address value. This value is com-
pared against the search argument. The result of
this comparison is used to select one of two index
values for use in the next stage of the look-up.
17
18
19
20
21
22
Description
23
8
24
7
Preliminary Data Sheet
25
6
26
5
Agere Systems Inc.
27
4
28
3
29
April 2006
2
30
1
31
0