Extreme Networks 200 Series - Manual (Page 170)

168 Summit 200 Series Switch Installation and User Guide
Quality of Service (QoS)
• Priority
• A list of all traffic groups 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 information including PACE enable/disable information.
• show vlan —Displays the QoS profile assignments to the VLAN.
• show ports info {detail} —Displays information including QoS information for the
port.
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 200 series 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 Chapter 9, “Access Policies”.
Dynamic Link Context System
The Dynamic Link Context System (DLCS) is a feature that snoops WINS NetBIOS packets and creates a
mapping between a user name, the IP address or MAC address, and the switch/port. Based on the
information in the packet, DLCS can detect when an end station boots up or a user logs in or out, and
dynamically maps the end station name to the current IP address and switch/port. This information is
available for use by ExtremeWare Enterprise Manager (EEM) version 2.1 or later or ExtremeWare
EPICenter in setting policies that can be applied to users and can dynamically follow a user's location.
DLCS provides you with valuable information on a user’s location and associated network attributes.
For DLCS to operate within ExtremeWare, the user or end station must allow for automatic DLCS
updates.
This feature should only be used in conjunction with the EEM Policy System or ExtremeWare EPICenter
Policy System. Refer to the ExtremeWare Enterprise Manager or ExtremeWare EPICenter documentation
for more information.