Dell S4820T, Configuration Manual

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to classify input traffic on an interface based on the DSCP value of each packet and assigns it an initial
drop precedence of green, yellow, or red
The default setting for each DSCP value (0-63) is green (low drop precedence). The DSCP color map
allows you to set the number of specific DSCP values to yellow or red. Traffic marked as yellow delivers
traffic to the egress interface, which will either transmit or drop the packet based on configured queuing
behavior. Traffic marked as red (high drop precedence) is dropped.
Important Points to Remember
• All DSCP values that are not specified as yellow or red are colored green (low drop precedence).
• A DSCP value cannot be in both the yellow and red lists. Setting the red or yellow list with any DSCP
value that is already in the other list results in an error and no update to that DSCP list is made.
• Each color map can only have one list of DSCP values for each color; any DSCP values previously
listed for that color that are not in the new DSCP list are colored green.
• If you configured a DSCP color map on an interface that does not exist or you delete a DSCP color
map that is configured on an interface, that interface uses an all green color policy.
To create a DSCP color map:
1. Create the color-aware map QoS DSCP color map.
CONFIGURATION mode
qos dscp-color-map color-map-name
2. Create the color aware map profile.
DSCP-COLOR-MAP
dscp {yellow | red} { list-dscp-values }
3. Apply the map profile to the interface.
CONFIG-INTERFACE mode
qos dscp-color-policy color-map-name
Example: Create a DSCP Color Map
The following example creates a DSCP color map profile, color-awareness policy, and applies it to
interface
te 1/11 .
Create the DSCP color map profile, bat-enclave-map , with a
yellow
drop precedence , and set the
DSCP values to
9,10,11,13,15,16
Dell(conf)# qos dscp-color-map bat-enclave-map
Dell(conf-dscp-color-map)# dscp yellow 9,10,11,13,15,16
Dell (conf-dscp-color-map)# exit
Assign the color map, bat-enclave-map to interface te 1/11 .
Dell(conf)# interface tengigabitethernet 1/11
Dell(conf-if-te-1/11)# qos dscp-color-policy bat-enclave-map
Quality of Service (QoS)
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