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Quality of Service: Managing Bandwidth More Effectively
Globally-Configured QoS
■ 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 Global QoS Remarking Entries: The switches covered in
this guide accept the maximum number of configured outbound 802.1p
priority and DSCP entries shown in Table 6-7.
Table 6-7. Maximum Number of QoS Entries.
Switch Software
Version
Maximum QoS
Remarking
Notes
Switch 8212zl
Series 5400zl
• Each IP Device (IP address) QoS
configuration uses two entries.
• Each TCP/UDP Port QoS configuration
uses two entries.
• All other global QoS classifier
configurations use one entry each.
Series 5300yl
250* configured
entries
*Configuring IP Device (IP address) and TCP/UDP global QoS classifiers reduces this
maximum. For more information, see the “Notes” column.
If the global QoS configurations on a switch exceed the maximum number
of entries shown in Table 6-7, the following error message is displayed:
Unable to add this QoS rule. Maximum number (entry-#)
already reached.
■ Not Supported: Use of an inbound 802.1p packet priority as a classifier
for remapping a packet’s outbound priority to different 802.1p priority.
For example, where inbound packets carry an 802.1p priority of 1, QoS
cannot be configured use this priority as a classifier for changing the
outbound priority to 0.
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