Enterasys Matrix 7G4270-09 Configuration Manual page 14

Understanding QoS Configuration on the Matrix N-Series
The following example displays default values for the show cos port‐resource txq command
output:
Matrix(su)->show cos port-resource txq
'?' after the rate value indicates an invalid rate value
Group Index Resource Type Unit
----------- -------- ---- ---- ----------
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.1
0.1
0.1
0.1
The set cos port‐resource txq command is used for creating outbound rate shapers. You need to:
• Identify the port group for configuration
• Identify the queue resource ID, along with unit and rate desired for that queue
CoS IRL Port-Resource (Inbound Rate Limiter)
Unlike rate shaping, inbound rate limiting or rate policing simply drops or clips traffic inbound if
a configured rate is exceeded. See "Rate Limiting" on page
limiting. CoS inbound rate limiting allows you to configure rate limits based on a unit rate
(kilobits/second, megabits/second, gigabits/second), or percentage of the port's line speed. The IRL
port‐resource configuration allows you to enable sending syslog messages or traps once a rate
limit is exceeded, as well as to disable the port.
The show cos port‐resource irl command displays resources for each port group created along
with the index, as described above. By default, no resources are configured for IRL port‐resources.
Rates displayed as none indicate no resources exist. The default Rate Limiting algorithm is
tail‐drop. The Action field in the display indicates user‐desired action for each syslog, trap, and
port disable behavior when configured.
The following example displays default values for the show cos port‐resource irl command
output:
February 22, 2008
0 txq perc none
1 txq perc none
2 txq perc none
3 txq perc none
4 txq perc none
5 txq perc none
6 txq perc none
7 txq perc none
8 txq perc none
9 txq perc none
10 txq perc none
11 txq perc none
12 txq perc none
13 txq perc none
14 txq perc none
15 txq perc none
0 txq perc none
1 txq perc none
2 txq perc none
3 txq perc none
Rate Algorithm
---------
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
tail-drop
7 for a general discussion of rate
Page 14 of 29