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DELL S6000-ON User Manual

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Dell# show cam layer3-qos interface tengigabitethernet 2/4/1
Cam   Port Dscp Proto Tcp  Src  Dst SrcIp        DstIp     DSCP   Queue
Index                 Flag Port Port                       Marking
-----------------------------------------------------------------------
20416 1   18    IP   0x0   0    0   23.64.0.5/32 0.0.0.0/0 20     2
20417 1   18    IP   0x0   0    0   0.0.0.0/0    0.0.0.0/0 -      0
20418 1   0     IP   0x0   0    0   23.64.0.2/32 0.0.0.0/0 10     1
20419 1   0     IP   0x0   0    0   0.0.0.0/0    0.0.0.0/0 -      0
20420 1   0     IP   0x0   0    0   23.64.0.3/32 0.0.0.0/0 12     1
20421 1   0     IP   0x0   0    0   0.0.0.0/0    0.0.0.0/0 -      0
20422 1   10    0    0x0   0    0   0.0.0.0/0    0.0.0.0/0 14     1
24511 1   0     0    0x0   0    0   0.0.0.0/0    0.0.0.0/0 -      0
In the previous example, the ClassAF1 does not classify traffic as intended. Traffic matching the first 
match criteria is classified to Queue 1, but all other traffic is classified to Queue 0 as a result of CAM entry 
20419.
When you remove the explicit “deny any” rule from all three ACLs, the CAM reflects exactly the desired 
classification.
The following example shows correct traffic classifications.
Dell#show cam layer3-qos interface tengigabitethernet 2/4/1
Cam   Port Dscp Proto Tcp  Src  Dst SrcIp        DstIp     DSCP    Queue
Index                 Flag Port Port                       Marking
-------------------------------------------------------------------------
20416 1    18   IP    0x0  0    0   23.64.0.5/32 0.0.0.0/0 20      2
20417 1    0    IP    0x0  0    0   23.64.0.2/32 0.0.0.0/0 10      1
20418 1    0    IP    0x0  0    0   23.64.0.3/32 0.0.0.0/0 12      1
20419 1    10   0     0x0  0    0   0.0.0.0/0    0.0.0.0/0 14      1
24511 1    0    0     0x0  0    0   0.0.0.0/0    0.0.0.0/0  -      0
Dot1p to Queue Mapping Requirement
The dot1p to queue mapping on the system is global and this is used to configure the PRIO2COS table 
configuration. For DSCP based PFC feature on untagged packets, this mapping must be the same as the 
default dot1p to queue mapping and should not be changed (as in TABLE 1). If a custom dot1p to queue 
mapping is present it should be reconfigured to the default dot1p to queue mapping.
• Currently Dell Networking OS supports matching only the following TCP flags:
– ACK
– FIN
– SYN
– PSH
– RST
– URG
In the existing software, ECE/CWR TCP flag qualifiers are not supported.
• Because this functionality forcibly marks all the packets matching the specific match criteria as 
‘yellow’, Dell Networking OS does not support Policer based coloring and this feature concurrently.
736
Quality of Service (QoS)