HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 248

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 Packet Criteria or Restriction UDP/TCP Restricted to Yes IPv4 Packets Only Allow Packets Yes with IP Options1 QoS Classifiers Device IP Type-of- Layer 3 Priority (IP Service Protocol Address) VLAN Yes Yes No No Yes Yes Yes Yes Source Port No Yes Incoming 802.1p DSCP Overwrite (ReMarking) No Yes Yes No Support IPv6 No No No Yes Yes Yes Yes No Packets1 1For explicit QoS support of IPv6 packets, force IPv6 traffic into its own set of VLANs and then configure VLAN-based classifiers for those VLANs. ■ All Switches: For explicit QoS support of IP subnets, ProCurve recommends 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 configuration entries shown in table 5-12. 5-72