Quality of Service (QoS): Managing Bandwidth More Effectively

QoS Operating Notes and Restrictions

Table 5-12. Maximum QoS Entries.

Switch

Software

Maximum

Notes

 

Version

QoS Entries

 

 

 

 

 

Switch 6120

 

250*

• 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.

 

 

 

 

*Configuring device (IP address) or TCP/UDP QoS entries reduces this maximum. See the “Notes” column.

Attempting to exceed the above limits generates the following message in the CLI:

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.

■Monitoring Shared Resources: The QoS feature shares internal switch resources with several other features. The switch provides ample resources for all features. However, if the internal resources become fully subscribed, additional QoS provisions cannot be configured until the necessary resources are released from other uses. For information on determining the current resource availability and usage, refer to the appendix titled “Monitoring Resources” in the Management and Config- uration Guide for your switch.

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