User guide

Modifying a QoS Configuration
ExtremeWare 7.2e Installation and User Guide 117
NOTE
The QoS monitor displays the statistics of incoming packets. The real-time display corresponds to the
802.1p values of the incoming packets. Any priority changes within the switch are not reflected in the
display.
Displaying QoS Profile Information
The QoS monitor can also be used to verify the QoS configuration and monitor the use of the QoS
policies that are in place. To display QoS information on the switch, use the following command:
show qosprofile {<qosprofile>} {port <portlist>}
Displayed information includes:
• QoS profile name
• Priority
• A list of all ports to which the QoS profile is applied
• A list of all VLANs to which the QoS profile is applied
Additionally, QoS information can be displayed from the traffic grouping perspective by using one or
more of the following commands:
• show fdb permanent—Displays destination MAC entries and their QoS profiles.
• show switch—Displays hardware information.
• show vlan—Displays the QoS profile assignments to the VLAN.
Modifying a QoS Configuration
If you make a change to the parameters of a QoS profile after implementing your configuration, the
timing of the configuration change depends on the traffic grouping involved. The following rules apply:
• For destination MAC-based grouping (other than permanent), clear the MAC FDB using the
command
clear fdb. This command should also be issued after a configuration is implemented, as
the configuration must be in place before an entry is made in the MAC FDB. For permanent
destination MAC-based grouping, re-apply the QoS profile to the static FDB entry, as documented.
You can also save and reboot the switch.
• For physical and logical groupings of a source port or VLAN, re-apply the QoS profile to the source
port or VLAN, as documented. You can also save and reboot the switch.
Traffic Rate-Limiting
The Summit 400 switch rate-limiting method is based on creating a rate limit, a specific type of access
control list. Traffic that matches a rate limit is constrained to the limit set in the access control list. Rate
limits are discussed in “Rate Limits” on page 139.