Administrator Guide
Applying a WRED Prole to Trac
After you create a WRED prole, you must specify on which trac the system applies the prole.
The system assigns a color-coded drop precedence — red, yellow, or green — to each packet based on the fourth bit of the 6-bit DSCP
eld in the packet header before queuing it.
• If the fourth DSCP bit is 0, packet is marked as green.
• If the fourth DSCP bit is 1, the packet is marked as yellow (except for DSCP 63, which is marked as red).
• If you do not congure honor DSCP values on ingress packets (trust diffservcommand), all trac defaults to green drop
precedence. See Honoring DSCP Values on Ingress Packets for more information.
• Assign a WRED prole to either yellow or green trac.
QOS-POLICY-OUT mode
wred
Displaying Default and Congured WRED Proles
To display the default and congured WRED proles, use the following command.
• Display default and congured WRED proles and their threshold values.
EXEC mode
show qos wred-profile
Example of the show qos wred-profile Command
Dell#show qos wred-profile
Wred-profile-name min-threshold max-threshold max-drop-rate
wred_drop 0 0 100
wred_teng_y 594 5941 100
wred_teng_g 594 5941 50
wred_fortyg_y 594 5941 50
wred_fortyg_g 594 5941 25
wred_oneg_y_pe 154 1538 100
wred_oneg_g_pe 154 1538 50
wred_teng_y_pe 154 1538 50
wred_teng_g_pe 154 1538 25
Displaying WRED Drop Statistics
To display WRED drop statistics, use the following command.
• Display the number of packets that the WRED prole drops.
EXEC Privilege mode
show qos statistics
Examples of the show qos statistics Commands
The following shows the show qos statistics output.
Dell# show qos statitstics wred-profile
WInterface Te 0/49
Drop-statistic Dropped Pkts
Quality of Service (QoS)
861