Qos Operating Notes And Restrictions - HP PROCURVE 2610 Advanced Traffic Management Manual

Quality of Service (QoS): Managing Bandwidth More Effectively

QoS Operating Notes and Restrictions

QoS Operating Notes and Restrictions
Table 6-12. Details of Packet Criteria and Restrictions for QoS Support
Packet Criteria or
Restriction
Restricted to IPv4 Packets Only
1
Allow Packets with IP Options
2
Support IPv6 Packets
Support Layer-2 SAP
Encapsulation
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.
■
■
■
■
■
■
6-66
UDP/TCP Device IP Type-of-
Priority (IP Service
Address)
Yes Yes
Yes Yes
No No
No No
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. For more on VLANs, refer to chapter 2, "Static Virtual
LANs (VLANs)".
SAP-Encapsulated Packet Restriction: Except for source-port
QoS and VLAN QoS, the switches covered in this guide do not support
QoS operation for SAP-Encapsulated packets. Thus, the switch can
use only VLAN QoS and source-port QoS to prioritize SAP-encapsu­
lated packets.
Packets with IP Option Fields in the Header: UDP/TCP QoS is
not supported for IP packets carrying optional fields in their headers.
RADIUS Authentication: RADIUS authentication allowing traffic
through a given port may override the port's QoS configuration, which
generates an Event Log message. When the authenticated host discon­
nects, the port returns to the static QoS configuration.
QoS Classifiers
VLAN Source
Port
Yes No No
Yes Yes Yes
No Yes Yes
No Yes Yes
DSCP
Overwrite
Incoming
(Re-
802.1p
Marking)
No Yes
Yes Yes
Yes No
Yes No