Dell Force10 S4810P - Apply a WRED Profile to Traffic; Display Default and Configured WRED Profiles

838 | Quality of Service (QoS)
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2. The command wred places you in WRED mode. From this mode, specify minimum and maximum
threshold values using the command
threshold.
Apply a WRED profile to traffic
Once you create a WRED profile you must specify to which traffic FTOS should apply the profile.
FTOS assigns a color (also called drop precedence)—red, yellow, or green—to each packet based on it
DSCP value before queuing it. DSCP is a 6 bit field. Dell Force10 uses the first three bits of this field (DP)
to determine the drop precedence. DP values of 110 and 100 map to yellow, and all other values map to
green. If you do not configure FTOS to honor DSCP values on ingress (Honor DSCP values on ingress
packets on page 831) see all traffic defaults to green drop precedence.
Assign a WRED profile to either yellow or green traffic from QOS-POLICY-OUT mode using the
command
wred.
Display Default and Configured WRED Profiles
Display default and configured WRED profiles and their threshold values using the command show qos
wred-profile
from EXEC mode, as shown in Figure 39-14.
Figure 39-14. Displaying WRED Profiles (E-Series)
Figure 39-15. Displaying WRED Profiles (S4810)
FTOS#show qos wred-profile
Wred-profile-name min-threshold max-threshold
wred_drop 0 0
wred_ge_y 1000 2000
wred_ge_g 2000 4000
wred_teng_y 4000 8000
wred_teng_g 8000 16000
FTOS#show qos wred-profile
Wred-profile-name min-threshold max-threshold max-drop-rate
wred_drop 0 0 100
wred_teng_y 467 4671 100
wred_teng_g 467 4671 50
wred_fortyg_y 467 4671 50
wred_fortyg_g 467 4671 25
0
FTOS#