Example of rate—shape Command
Dell#config
Dell(conf)#interface tengigabitethernet 1/0
Dell(conf-if)#rate shape 500 50
Dell(conf-if)#end
Dell#
Guidelines for Configuring ECN for Classifying and Color-Marking Packets
Keep the following points in mind while configuring the marking and mapping of incoming packets using
ECN fields in IPv4 headers:
• 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.
• 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”
– CIR < x< PIR – will be marked as “Yellow”
– PIR < x – will be marked as “Red”
But ‘Green’ packets matching the specific match criteria for which ‘color-marking’ is configured will be
over-written and marked as “Yellow”.

Sample configuration to mark non-ecn packets as “yellow” with Multiple

traffic class

Consider the example where there are no different traffic classes that is all the packets are egressing on
the default ‘queue0’.
Dell Networking OS can be configured as below to mark the non-ecn packets as yellow packets.
!
ip access-list standard ecn_0
724 Quality of Service (QoS)