T8207 Datasheet, PDF (31/158 Pages) Agere Systems – ATM Interconnect

Advance Data Sheet
September 2001
CelXpres T8207
ATM Interconnect
8 Look-Up Table (continued)
VPI ONLY TRANSLATION RECORD
b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
+0 A
P
E
I
VPI[11:0]
+2 SH SL
RESERVED
+4
CELL BUS ROUTING HEADER[15:0]
+6
TANDEM ROUTING HEADER[15:0]
VPI for VPI/VCI Translation Record
b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
+0 A
P
E
I
RESERVED
+2
BITS 3 THROUGH 18 OF VCI OFFSET[15:0]
+4
MAX VCI VALUE[15:0]
+6
RESERVED
VCI TRANSLATION RECORD
b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
+0 A
—
E
I
VPI[11:0]
+2
VCI[15:0]
+4
CELL BUS ROUTING HEADER[15:0]
+6
TANDEM ROUTING HEADER[15:0]
OAM/RM TRANSLATION RECORD
b15 b14 b13 b12 b11 b10 b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
+0 A
C1 C0
I
VPI[11:0]
+2
VCI[15:0]
+4
CELL BUS ROUTING HEADER[15:0]
+6
TANDEM ROUTING HEADER[15:0]
Figure 6. Translation Record Types—8-Byte Records
The routing control bits for VPI, VCI, and OAM/RM records are described below:
s Active (A). This bit is one when the VPI or VCI is considered active. See the truth table (Table 11) below. This bit
is used in all types of records.
s Ignore (I). When this bit is one, the VPI or VCI is ignored. See the truth table (Table 11) below. This bit is used in
all types of records.
Table 11. Active and Ignore Truth Table
AI
Action
0 0 The cell is discarded, considered misrouted, and counted as a received cell.
0 1 The cell is discarded, is not flagged as misrouted, and is not counted as a received cell.
1 0 The cell is valid and is counted as a received cell.
1 1 The cell is discarded, is not flagged as misrouted, and is not counted as a received cell.
Agere Systems Inc.
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