Cabletron Systems 04-0053-01 manual 7a3, Corresponds to CBR, MinIndex for

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

6-6 SmartSwitch ATM User Guide