cn8237 Mindspeed Technologies, cn8237 Datasheet - Page 200

• Manufacturer Part Number: cn8237
• Description: Atm Oc-12 Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

Table 6-7. CBR_TUN_ID Field, Bit Definitions—CBR Slot
Table 6-8. CBR_TUN_ID Field, Bit Definitions—Tunnel Slot
Table 6-9. Schedule Slot Field Descriptions—CBR Traffic
6.0 Traffic Management
6.5 Traffic Management Control and Status Structures
6.5.2 CBR-Specific Structures
6-44
CBR
PRI3
PRI2
PRI1
PRI0
CBR_VCC_INDEX
NOTE(S):
PRI2 the same priority. PRI1 and PRI0 values are Don’t Cares in this case. If two priorities are to be assigned to the tunnel,
assign the higher priority to PRI3 and the lower priority to PRI2, making PRI1 the same as PRI2. PRI0 is a Don’t Care in this
case. If three priorities are to be assigned to the tunnel, assigns the priorities by level to PRI3 (highest), PRI2 and PRI1 (lowest),
making PRI0 the same as PRI1. TUN_PRI0_OFFSET can be used to set PRI0 = PRI1, as needed.
6.5.2.2 Tunnel Traffic
Def.
Def.
Bit
Bit
6.5.2.1 CBR Traffic
Field Name
If the user wants only one priority of traffic scheduled in the CBR tunnel, assign the priority level to PRI3, and make
31
31
1
0
30
30
Set high to indicate a CBR slot; set low to indicate a tunnel slot.
Specifies the highest priority of four possible scheduling priority queues to service when a scheduling
slot for this CBR tunnel becomes active.
Specifies the second highest priority of four possible scheduling priority queues to service when a
scheduling slot for this CBR tunnel becomes active.
Specifies the third highest priority of four possible scheduling priority queues to service when a
scheduling slot for this CBR tunnel becomes active.
Specifies the lowest priority of four possible scheduling priority queues to service when a scheduling
slot for this CBR tunnel becomes active.
Segmentation VCC index for dedicated CBR schedule slot. CBR VCC indexes range from 0x0000 to
0x7FFE.
29
29
PRI3
A schedule slot is dedicated to a CBR connection by formatting the CBR bit to a
logic high and the CBR_TUN_ID field in the slot entry as illustrated in
A schedule slot is dedicated to a CBR tunnel by formatting the CBR bit to a logic
low and the CBR_TUN_ID field of the slot entry as illustrated in
Schedule Slot field descriptions are detailed in
28
28
27
27
Mindspeed Technologies
26
26
25
25
PRI2
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
CBR_VCC_INDEX (15 bits)
24
24
Description
23
23
22
22
™
21
21
Table
PRI1
20
20
6-9.
19
19
28237-DSH-001-C
18
18
Table
PRI0
17
17
Table
CN8237
6-8. The
16
16
6-7.