Traffic Groupings; Precedence Of Traffic Groupings - Extreme Networks ExtremeWare XOS Guide Manual

The priority of a QoS profile determines the DiffServ code point value used in an IP packet when
■
the packet is transmitted (see
A QoS profile does not alter the behavior of the switch until it is assigned to a traffic grouping. Recall
that QoS profiles on the BlackDiamond 10K switch are linked to hardware queues. There are multiple
hardware queues per physical port. By default, a QoS profile links to the identical hardware queue
across all the physical ports of the switch.
The default QoS profiles cannot be deleted. Also by default, a QoS profile maps directly to a specific
hardware queue across all physical ports. The settings for the default QoS parameters on the
BlackDiamond 10K switch are summarized in
Table 42: Default QoS profile parameters on the BlackDiamond 10K switch
Profile name Hardware queue
QP1 Q0
QP2 Q1
QP3 Q2
QP4 Q3
QP5 Q4
QP6 Q50
QP7 Q6
QP8 Q7

Traffic Groupings

After a QoS profile has been created or modified, you assign a traffic grouping to the profile. A traffic
grouping is a classification of traffic that has one or more attributes in common. Traffic is typically
grouped based on the needs of the applications discussed starting
Traffic groupings are separated into the following categories for discussion:
ACL-based information
●
Explicit packet class of service information, such as 802.1p or DiffServ (IP TOS)
●
Physical/Logical configuration (physical source port or VLAN association)
●

Precedence of Traffic Groupings

In the event that a given packet matches two or more grouping criteria, there is a predetermined
precedence for which traffic grouping applies. The supported traffic groupings, by precedence, are listed
in the following:
Access list groupings (ACLs)
●
IP ACL
■
MAC ACL
■
Explicit packet class of service groupings
●
DiffServ (IP TOS)
■
802.1p
■
ExtremeWare XOS 11.3 Concepts Guide
"Replacing DiffServ code points" on page
Table 42.
Priority Minimum bandwidth
Low 0%
LowHi 0%
Normal 0%
NormalHi 0%
Medium 0%
MediumHi 0%
High 0%
HighHi 0%
Traffic Groupings
301).
Maximum bandwidth
100%
100%
100%
100%
100%
100%
100%
100%
on page 290.
295