HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 212

QoS Operating Notes and Restrictions, All Switches

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Quality of Service (QoS): Managing Bandwidth More Effectively QoS Operating Notes and Restrictions QoS Operating Notes and Restrictions QoS support based on packet type is shown below. Table 5-11. Details of Packet Criteria and Restrictions for QoS Support Packet Criteria or Restriction QoS Classifiers Device IP Type-of- Source Priority (IP Service Port Address) Restricted to IPv4 Packets Only Yes Yes No Allow Packets with IP Options1 Yes Yes Yes Support IPv6 Packets2 No No Yes Support Layer-2 SAP Encapsulation No No Yes Incoming 802.1p DSCP Overwrite (ReMarking) No Yes Yes Yes Yes No Yes No 1An "IP Option" is an optional, extra field in the header of an IP packet. 2All Switches: 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. ■ 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. They support a maximum of 250 QoS entries. Each device (IP address) QoS configuration uses two entries. Each TCP/UDP port QoS configuration uses two entries. All other classifier configurations use one entry each. 5-41

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5-41
Quality of Service (QoS): Managing Bandwidth More Effectively
QoS Operating Notes and Restrictions
QoS Operating Notes and Restrictions
QoS support based on packet type is shown below.
Table 5-11.
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. They support a maximum of 250 QoS entries. Each device
(IP address) QoS configuration uses two entries. Each TCP/UDP port QoS
configuration uses two entries. All other classifier configurations use one
entry each.
Packet Criteria or
Restriction
QoS Classifiers
DSCP
Overwrite
(Re-
Marking)
Device
Priority (IP
Address)
IP Type-of-
Service
Source
Port
Incoming
802.1p
Restricted to IPv4 Packets Only
Yes
Yes
No
No
Yes
Allow Packets with IP Options
1
Yes
Yes
Yes
Yes
Yes
Support IPv6 Packets
2
No
No
Yes
Yes
No
Support Layer-2 SAP
Encapsulation
No
No
Yes
Yes
No
1
An “IP Option” is an optional, extra field in the header of an IP packet.
2
All Switches: 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.