Quality of Service (QoS)

Screen component

Description

QoS configuration type

Three configuration types provide administrators with basic settings that can be further tuned depending on whether or not FCoE traffic is present in the HPE OneView environment:

Passthrough

All ingress packets are not classified at egress. FCoE packets having a separate PG (Priority Group) are processed at ingress. There are no traffic classes, maps, or rules applied. Passthrough mode is equivalent to no QoS (QoS disabled).

Custom (with FCoE lossless)

Enables QoS and allows a customized configuration that includes FCoE class. The configuration defines two default system classes, Best Effort and FCoE Lossless. FCoE Lossless class cannot be edited by the user and is pre-configured for 50% bandwidth of the port. You can also configure up to six additional classes for non-FCoE Ethernet traffic.

Custom (without FCoE lossless)

Enables QoS and allows a customized configuration without FCoE. The configuration defines one system class (Best Effort). You can configure up to seven additional classes for non-FCoE Ethernet traffic.

Classification for uplinks

Uplink ports can be configured for ingress traffic classification based on the values of dot1p or DSCP or both in Ethernet and IP headers respectively.

Dot1p

A 3-bit field called the Priority Code Point (PCP) within an Ethernet frame header when using VLAN tagged frames as defined by IEEE 802.1Q. Eight different classes of service are available as expressed through the 3-bit PCP field.

DSCP

Differentiated Services Code Point (DSCP) is a field in an IP packet that enables different levels of service to be assigned to network traffic.

DSCP and Dot1p

For IP traffic use DSCP, and for non-IP traffic use dot1p priority.

Classification for downlinks

Downlink ports can be configured for ingress traffic classification based on the values of dot1p or DSCP or both.

Dot1p

A 3-bit field called the Priority Code Point (PCP) within an Ethernet frame header when using VLAN tagged frames as defined by IEEE 802.1Q. Eight different classes of service are available as expressed through the 3-bit PCP field.

DSCP

Differentiated Services Code Point (DSCP) is a field in an IP packet that enables different levels of service to be assigned to network traffic.

DSCP and Dot1p

For IP traffic use DSCP, and for non-IP traffic use dot1p priority.

Traffic Class

A traffic class is a queue for classified packets at the port egress.

If you select QoS configuration type Custom with FCoE Lossless, the configuration has two default system classes - Best Effort and FCoE Lossless. You can configure up to six additional classes for non-FCoE Ethernet traffic.

If you select QoS configuration type Custom without FCoE Lossless, the configuration defines one system class (Best Effort), and you can configure up to seven additional classes for non-FCoE Ethernet traffic.

Enabled

Specifies whether to enable or disable the traffic class.

% Share

Minimum guaranteed bandwidth for the traffic class.

The % share and the max share for a real time class must be equal and not exceed 50%.

Data type:

Value between 1 and 100

Max Share

Maximum share the traffic class can use when other traffic classes are not using their guaranteed share.

The max share and the % share for a real time class must be equal and not exceed 50%. For other classes, the max share is greater than or equal to the % share.

Data type:

Value between 1 and 100

Real Time

Specifies whether the traffic class is real time. Only 1 traffic class can be real time. Enabling real time for this class removes the real time flag for other classes.

Egress DOT1P Priority

Specifies the dot1p priority value to remark for the egressing packets. This provides flexibility to control priority treatment for packets at the next hops based on the remarked dot1p value.