Glossary

!
ip access-list standard dscp_40_ecn
seq 5 permit any dscp 40 ecn 1
seq 10 permit any dscp 40 ecn 2
seq 15 permit any dscp 40 ecn 3
!
ip access-list standard dscp_50_non_ecn
seq 5 permit any dscp 50 ecn 0
!
ip access-list standard dscp_40_non_ecn
seq 5 permit any dscp 40 ecn 0
!
class-map match-any class_dscp_40
match ip access-group dscp_40_non_ecn set-color yellow
match ip access-group dscp_40_ecn
!
class-map match-any class_dscp_50
match ip access-group dscp_50_non_ecn set-color yellow
match ip access-group dscp_50_ecn
!
policy-map-input pmap_dscp_40_50
service-queue 2 class-map class_dscp_40
service-queue 3 class-map class_dscp_50
Enabling Buffer Statistics Tracking
You can enable the tracking of statistical values of buffer spaces at a global level. The buffer statistics tracking utility operates
in the max use count mode that enables the collection of maximum values of counters.
To configure the buffer statistics tracking utility, perform the following step:
1. Enable the buffer statistics tracking utility and enter the Buffer Statistics Snapshot configuration mode.
CONFIGURATION mode
DellEMC(conf)#buffer-stats-snapshot
DellEMC(conf)#no disable
Enable this utility to be able to configure the parameters for buffer statistics tracking. By default, buffer statistics tracking is
disabled.
2. Enable the buffer statistics tracking utility and enter the Buffer Statistics Snapshot configuration mode.
CONFIGURATION mode
DellEMC(conf)#buffer-stats-snapshot
DellEMC(conf)#no disable
Enable this utility to be able to configure the parameters for buffer statistics tracking. By default, buffer statistics tracking is
disabled.
3. To view the buffer statistics tracking resource information depending on the type of buffer information, such as device-level
details, queue-based snapshots, or priority group-level snapshot in the egress and ingress direction of traffic, use show
hardware stack-unit <id> buffer-stats-snapshot unit <id> resource x
EXEC/EXEC Privilege mode
DellEMC#show hardware stack-unit 1 buffer-stats-snapshot unit 3 resource interface
all queue mcast 3
Unit 1 unit: 3 port: 1 (interface Fo 1/144)
---------------------------------------
Q# TYPE Q# TOTAL BUFFERED CELLS
---------------------------------------
MCAST 3 0
Unit 1 unit: 3 port: 5 (interface Fo 1/148)
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Q# TYPE Q# TOTAL BUFFERED CELLS
---------------------------------------
754
Quality of Service (QoS)