Enterasys Matrix 7G4270-09 Configuration Manual page 10

Understanding QoS Configuration on the Matrix N-Series
Determining CoS Port-Type
Based on physical capability, all physical DFE ports belong to one of two port‐types. The
importance of this port‐type distinction lies in the resources available for Transmit Queue and
Inbound Rate Limiting CoS features. The nomenclature distinguishes the types as port type 0 and
port type 1. The Enterasys Matrix DFE 7GR4270‐12, 7G4270‐12, 7G4270‐09, and 7G4270‐10
modules have a port type of 0. All other modules have a port type of 1.
TxQ
Port type 0 supports sixteen transmit queues, while type 1 supports four. Use the show cos
port‐type txq to display all the systemʹs ports currently associated to each type.
The following example displays default values for the show cos port‐type txq command output:
Matrix(su)->show cos port-type txq
Number of resources:
txq = transmit queue(s)
irl = inbound rate limiter(s)
orl = outbound rate limiter(s)
Index
-----
0
1
IRL
Type 0 supports thirty‐two Inbound Rate Limiters, while type 1 supports eight. Use the show cos
port‐type irl command to display the two port types and their associated ports.
February 22, 2008
Number of
slices /
Port type Number of
description queues
------------ ---------
DFE-P 16Q 64/16
DFE-P 4Q 32/4
Supported rate types:
perc = percentage
pps = packets per second
Kbps = kilobits per second
Mbps = megabits per second
Gbps = gigabits per second
Tbps = terabits per second
Supported Eligible
rate type ports
--------- -----------------
perc ge.3.1-12;
Kbps ge.4.1-9
Mbps
Gbps
perc ge.1.1-18;
Kbps fe.2.1-48;
Mbps ge.5.1-60;
Gbps ge.6.1-30;
ge.7.1-30
Unselected
ports
-----------------
ge.3.1-12;
ge.4.1-9
ge.1.1-18;
fe.2.1-48;
ge.5.1-60;
ge.6.1-30;
ge.7.1-30
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