User guide

6-6 SmartSwitch ATM User Guide
Traffic Management Capabilities Traffic Management
• Queue 4 — Available Bit Rate (ABR)
• Queue 5 — Unspecified Bit Rate (UBR)
If calls of a particular service class are being dropped on a particular port, use the
set porttrafficcongestion
command to raise the port’s queue Min threshold.
For example, to change both the Min and Max amounts of buffer space used for CBR calls on port
7a3, first enter the
show porttrafficcongestion command to determine the current minimum threshold level:
SmartSwitch # show porttrafficcongestion
PortNumber(ALL) : 7a3
PortID QueueId ServiceClass MinIndex MinValue MaxIndex MaxValue
==============================================================================
7A3 1 CBR 10 64 15 1024
7A3 2 RTVBR 8 256 13 4096
7A3 3 NRTVBR 8 256 13 4096
7A3 4 ABR 8 256 12 8192
7A3 5 UBR 8 256 12 8192
SmartSwitch #
CBR on port 7a3 is currently using 64 (MinIndex 10) as its minimum threshold. Use the show minmax command to
determine a new minimum threshold for CBR:
SmartSwitch # show minmax
-----------------------------------------
MinIndex MinValue MaxIndex MaxValue
-----------------------------------------
0 65536 0 1048576
1 32768 1 786432
2 16384 2 524288
3 8192 3 393216
4 4096 4 262144
5 2048 5 196608
6 1024 6 131072
7 512 7 98304
8 256 8 65536
9 128 9 49152
10 64 10 32768
11 32 11 16384
12 16 12 8192
13 8 13 4096
14 4 14 2048
15 0 15 1024
SmartSwitch #
From the table, we’ll select 128 (MinIndex 9). Use the set porttrafficcongestion command to assign this value to CBR
for port
7a3.
SmartSwitch # set porttrafficcongestion
Port(ALL) : 7a3
QueueNumber() : 1 — Corresponds to CBR
MinIndexNumber() : 9 — MinIndex for 128
MaxIndexNumber() : 15 — Specify the current MaxIndex