L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 262

• 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
Vlan_Index_Table_{0..4}
Description: This table converts VLAN identifiers into VLAN indexes.
Table 370. Vlan_Index_Table_{0..4} Register Parameters
Table 371. Vlan_Index_Table_{0..4} Field Parameters
This table is used to convert the 11-bit VLAN identifier extracted from the received packet into an 8-bit VLAN index
for use throughout the remainder of ingress processing. This table is addressed by the VLAN value extracted from
the received packets.
The VLAN identifier space consists of 4,094 values (4,095 for revisions B1 and C). Only 256 of them may be uti-
lized simultaneously by the ET4148-50 system. Consequently, only as many as 256 entries in this table may be
marked as valid through the assertion of vlan_index_valid. All remaining table entries must have this bit deas-
serted. If vlan_index_valid is false, vlan_index[7:0] is invalid.
Care must be taken when configuring this table to ensure consistency from one packet processor to the next.
262
Base Address
Register Size
Register Instances
Register Spacing
Record Size
Record Instances
Record Spacing
vlan_index_valid
vlan_index[7:0]
0
Parameter
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
0
Field Name
1
2
REFERENCE
3
4
PORT
5
Figure 282. Vlan_Index_Table_{0..4} Register Diagram
6
XG1
60
(continued)
7
XG0
8
50
Figure 283. Port Numbering Scheme
9
SU1
49
0x0004_8000
Instances = 1
Instances = 1
10
Offset = 0.20
Mode = R/W
Mode = R/W
Parameters
Offset = 0.0
Agere Systems - Proprietary
SU0
11
48
16384
32768
G = 10/100/1000 Mbits/s PORT
XG = 10 Gbits/s PORT
SU = SUPERVISOR
Value
4096
PORT NUMBERING SCHEME
5
4
4
12
G47
47
13
G46
14
46
15
G45
45
16
This bit is asserted to indicate that the submitted
VLAN identifier value has a valid index stored in the
table.
The VLAN index as selected by the VLAN identifier.
G44
44
17
18
19
20
21
G3
22
3
23
Description
8
G2
2
24
7
Preliminary Data Sheet
G1
1
25
6
vlan_index[7:0]
26
5
G0
0
27
4
Agere Systems Inc.
28
3
29
2
April 2006
30
1
31
0