HP ProCurve Series 6120 Blade Switches Advanced Traffic Management Guide

5-72
Quality of Service (QoS): Managing Bandwidth More Effectively
QoS Operating Notes and Restrictions
QoS Operating Notes and Restrictions
Table 5-1. Details of Packet Criteria and Restrictions for QoS Support
■ All Switches: For explicit QoS support of IP subnets, ProCurve recom-
mends forcing IP subnets onto separate VLANs and then configuring
VLAN-based classifiers for those VLANs.
■ For Devices that Do Not Support 802.1Q VLAN-Tagged Ports:
For communication between these devices and the switch, connect
the device to a switch port configured as Untagged for the VLAN in
which you want the device’s traffic to move.
■ Port Tagging Rules: For a port on the switch to be a member of a
VLAN, the port must be configured as either Tagged or Untagged for
that VLAN. A port can be an untagged member of only one VLAN of
a given protocol type. Otherwise, the switch cannot determine which
VLAN should receive untagged traffic. For more on VLANs, refer to
chapter 2, “Static Virtual LANs (VLANs)”.
■ Maximum QoS Configuration Entries: The switches covered in this
guide accept the maximum outbound priority and/or DSCP policy config-
uration entries shown in table 5-12.
Packet
Criteria or
Restriction
QoS Classifiers DSCP
Overwrite
(Re-
Marking)
UDP/TCP Device
Priority (IP
Address)
IP Type-of-
Service
Layer 3
Protocol
VLAN Source
Port
Incoming
802.1p
Restricted to
IPv4 Packets
Only
YesYesYesNoNoNoNoYes
Allow Packets
with IP Options
1
Yes Yes Yes Yes Yes Yes Yes No
Support IPv6
Packets
1
No No No Yes Yes Yes Yes No
1
For explicit QoS support of IPv6 packets, force IPv6 traffic into its own set of VLANs and then configure VLAN-based
classifiers for those VLANs.