Deployment Guide

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 trac as intended. Trac matching the rst match criteria is classied to Queue 1,
but all other trac is classied to Queue 0 as a result of CAM entry 20419.
When you remove the explicit “deny any” rule from all three ACLs, the CAM reects exactly the desired classication.
The following example shows correct trac classications.
Dell#show cam layer3-qos interface tengigabitethernet 2/49
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
Create a QoS Policy
There are two types of QoS policies — input and output.
Input QoS policies regulate Layer 3 and Layer 2 ingress trac. The regulation mechanisms for input QoS policies are rate policing and
setting priority values. There are two types of input QoS policies: Layer 3 and Layer 2.
Output QoS policies regulate egress trac. The regulation mechanisms for output QoS policies are bandwidth percentage, scheduler strict,
rate shaping, and WRED.
NOTE
: When changing a "service-queue" conguration in a QoS policy map, all QoS rules are deleted and re-added automatically
to ensure that the order of the rule is maintained. As a result, the Matched Packets value shown in the show qos statistics
command is reset.
NOTE: To avoid issues misconguration causes, Dell Networking recommends conguring either DCBX or Egress QoS features,
but not both simultaneously. If you enable both DCBX and Egress QoS at the same time, the DCBX conguration is applied and
unexpected behavior occurs on the Egress QoS.
Creating an Input QoS Policy
To create an input QoS policy, use the following steps.
1 Create a Layer 3 input QoS policy.
CONFIGURATION mode
qos-policy-input
Create a Layer 2 input QoS policy by specifying the keyword layer2 after the qos-policy-input command.
2 After you create an input QoS policy, do one or more of the following:
Conguring Policy-Based Rate Policing
Setting a DSCP Value for Egress Packets
Setting a dot1p Value for Egress Packets
Quality of Service (QoS)
653