Enterasys Matrix 7G4270-09 Configuration Manual page 11

Understanding QoS Configuration on the Matrix N-Series
The following example displays default values for the show cos port‐type irl command output:
Matrix(su)->show cos port-type irl
Number of resources:
txq = transmit queue(s)
irl = inbound rate limiter(s)
orl = outbound rate limiter(s)
Index
-----
0
1
Configuring CoS Port Groups
CoS port groups provide for grouping ports by CoS feature configuration and port type. Ports are
required to be configured by groups: this feature provides a meaningful way of identifying ports
by similar functionality and port type.
Groups consist of a group number and port type and are numbered as such, port‐group.port‐type.
For example: port group 0, port type 1 would be numbered port group 0.1. Two default port
groups exist for both TxQ and IRL CoS features and are identified as port group 0 and port type 0
or 1 and are indexed as 0.0 and 0.1, respectively for each feature. These default port groups cannot
be removed and all physical ports in the system are assigned to one of the two port groups for
each feature (remember group assignment is determined by port type).
Additional port groups may be created. Ports assigned to a new port group cannot belong to
another non‐default port group entry and must be comprised of the same port type as defined by
the port group you are associating it with. The creation of additional port groups could be used to
combine similar ports by their function for flexibility. For instance, ports associated to users can be
added to a port group called Users and ports associated to uplink ports can be added to a port
group called Uplink. Using these port groups, a class of service unique to each group can assign
different rate limits to each port group. User ports can be assigned a rate limit configured in one
CoS, while Uplink ports can be assigned a different rate limit configured in another CoS. A
maximum of 8 port groups per CoS transmit queue and/or rate‐limiter function are supported.
February 22, 2008
Port type Number of
description limiters
------------ ---------
DFE-P 32 IRL 32 irl
DFE-P 8 IRL 8 irl
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;
pps ge.4.1-9
Kbps
Mbps
Gbps
perc ge.1.1-18;
pps fe.2.1-48;
Kbps ge.5.1-60;
Mbps ge.6.1-30;
Gbps 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
Page 11 of 29