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Cabletron Systems 9A100 User Manual

Page 63

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SmartSwitch 9A100 User Guide 4-21

Switch Administration

Traffic Management

For example, enter the

show porttrafficcongestion

command to view current buffer utilization.

SmartSwitch # show porttrafficcongestion

PortNumber(ALL) :

Port ID Queue 1 Queue 2 Queue 3 Queue 4

Min Max Min Max Min Max Min Max

============================================================================

A1 20 1000 20 2000 20 1000 20 16384

A2 20 1000 20 2000 20 1000 20 16384

A3 20 1000 20 2000 20 1000 20 16384

A4 20 1000 20 2000 20 1000 20 16384

B1 20 1000 20 2000 20 1000 20 16384

B2 20 1000 20 2000 20 1000 20 16384

B3 20 1000 20 2000 20 1000 20 16384

B4(CPU) 20 1000 20 2000 20 1000 20 16384

C1 20 1000 20 2000 20 1000 20 16384

C2 20 1000 20 2000 20 1000 20 16384

C3 20 1000 20 2000 20 1000 20 16384

C4 20 1000 20 2000 20 1000 20 16384

D1 20 1000 20 2000 20 1000 20 16384

D2 20 1000 20 2000 20 1000 20 16384

D3 20 1000 20 2000 20 1000 20 16384

D4 20 1000 20 2000 20 1000 20 16384

SmartSwitch #

Min and Max are thresholds set on a per-queue, per-port basis and are measured in cells (53 bytes). The Min threshold
is the amount of buffer space guaranteed to a call of a particular QoS on the corresponding port. The Max threshold is
the maximum amount of buffer space that a call of a particular QoS is allowed on the corresponding port.

QoS corresponds to the queues as follows:

Queue 1 — Constant Bit Rate (CBR)

Queue 2 — Real Time Variable Bit Rate (rt-VBR)

Queue 3 — Non-real time Variable Bit Rate (Nrt-VBR)

Queue 4 — Unspecified Bit Rate (UBR)

If calls of a particular QoS type 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

a3

, enter the

following:

SmartSwitch # set porttrafficcongestion

Port(ALL) : a3

Queue1MinimumCellCounter(20) : 1000

< Min for CBR queue

Queue2MinimumCellCounter(20) :

Queue3MinimumCellCounter(20) :

Queue4MinimumCellCounter(20) :

Queue1MaximumCellCounter(1000) : 10000

< Max for CBR queue

Queue2MaximumCellCounter(2000) :

Queue3MaximumCellCounter(1000) :

Queue4MaximumCellCounter(16384) :

SmartSwitch #