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class match_dscp_set_dscp_queue
set dscp 3
set cos 6
set qos-group 6
Dell# show running-config interface ethernet1/1/3
!
interface ethernet1/1/3
no shutdown
switchport mode trunk
service-policy input type qos match_dscp_set_dscp_queue
The incoming encapsulated traffic arriving in port 1/1/3 has a DSCP value of 30 in the Outer IP header. This DSCP value is
matched in the Class Map. The Policy map match_dscp_set_dscp_queue is applied on the network port. This results in the
following:
The traffic flowing out of Port 1/1/1 has DSCP value of 30, VLAN 10 and dot1p priority 6 in the packet and flows out of Queue 6.
The traffic flowing out of port 1/1/2 will have DSCP value of 3 flowing out of Queue 6. The traffic will not have any VLAN
header as it is an untagged port. If port 1/1/2 is configured as a trunk port, the outgoing traffic will have the VLAN header with
VLAN 20 and dot1p priority 6 in addition to the DSCP value of 6.
QoS in VTEPs if Network ports are L3 VLANs
In the previous sections, the Network ports on the VTEPs towards the Spine nodes are physical L3 uplinks. These network ports
can also be L3 VLANs. If L3 VLANs are configured as network ports, the encapsulated packets will have the following and below
actions can be performed.
1. The configured VLAN in the encapsulated VxLAN outer header.
2. The dot1p priority in the outer header can be modified using the Policy maps configured.
Similarly on the incoming packets on the network ports, the matching can be done based on the incoming dot1p priority and
VLAN in addition to the DSCP value on the outer header of the encapsulated VxLAN packets.
QoS in Spine Node
The QoS policy maps can be created in the Spine nodes. When policy maps are applied on the Spine interfaces, the packet
matching and action both happens on the outer header of the VxLAN encapsulated packets. The below classification and
remarking can be configured on the Spine nodes.
1. Match VLAN and set dot1p, set DSCP and set Queue.
2. Match DSCP and set dot1p, set DSCP and set Queue.
3. Match dot1p and set dot1p, set DSCP and set Queue.
QoS VXLAN examples
This section provides an overview of various QoS configurations in a VXLAN environment.
The following topology is used to explain various QoS configurations in a VXLAN environment:
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Quality of service