User Manual

Enterasys X-Pedition User Reference Manual 431
Traffic Prioritization
You can create one or more priority maps that are different from the default priority map and then
apply these maps to some or all ports of the XP. The new priority mapping replaces the default
mappings for those ports to which they are applied.
Creating and Applying a New Priority Map
To specify a priority map on a per-port basis, enter the following commands in Configure mode:
For example, the following command creates the priority map “all-low” which maps all 802.1p
priorities to the “low” internal priority queue:
Once a priority map is created, it can then be applied to a set of ports, as shown in the following
example:
In the above example, ports et.1.1-4 and ports gi.4.* will use the “all-low” priority map. All other
ports, including ports et.1.5-8, will use the default priority map.
You do not need to specify mappings for all 802.1p values. If you do not specify a particular
mapping, the default mapping for that 802.1p priority is used. The following example creates a
priority map “no-ctrl” with the same mappings as the default priority map, except that the 802.1p
priority of 7 is mapped to the internal priority “high” instead of “control.”
Removing or Disabling Per-Port Priority Map
Negating a qos create priority-map command removes the priority map. (Before you can remove
a priority map, you must negate all commands that use the priority map.) Negating a qos apply
priority-map command causes the configured ports to use the default priority mapping.
6, 7 Control
Create a new priority
mapping.
qos create priority-map <name> <CoS number>
control|high|medium|low
Apply new priority
mapping to ports.
qos apply priority-map <name> ports <port-list>
qos create priority-map all-low 0 low 1 low 2 low 3 low 4 low 5 low 6 low 7 low
qos apply priority-map all-low ports et.1.1-4, gi.4.*
qos create priority-map no-ctrl 7 high
Table 13: Default Priority Map
802.1p CoS
Valu es
Internal Priority
Queue