Setup Guide

Table Of Contents
class-map match-any ClassAF1
match ip access-group AF1-FB1 set-ip-dscp 10
match ip access-group AF1-FB2 set-ip-dscp 12
match ip dscp 10 set-ip-dscp 14
match ipv6 dscp 20 set-ip-dscp 14
!
class-map match-all ClassAF2
match ip access-group AF2
match ip dscp 18
DellEMC#show running-config ACL
!
ip access-list extended AF1-FB1
seq 5 permit ip host 23.64.0.2 any
seq 10 deny ip any any
!
ip access-list extended AF1-FB2
seq 5 permit ip host 23.64.0.3 any
seq 10 deny ip any any
!
ip access-list extended AF2
seq 5 permit ip host 23.64.0.5 any
seq 10 deny ip any any
DellEMC# 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.
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 EMC 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 EMC Networking OS does
not support Policer based coloring and this feature concurrently.
If single rate two color policer is configured along with this feature, then by default all packets less than PIR would be considered as
“Green” But ‘Green’ packets matching the specific match criteria for which ‘color-marking’ is configured will be over-written and
marked as “Yellow”.
If two rate three color policer is configured along with this feature then,
x < CIR – will be marked as “Green”
668
Quality of Service (QoS)