Enterasys Networks Enterasys D2 D2G124-12P - Manual (Page 306)

set cos settings
9-20 Policy Classification Configuration
set cos settings
Use this command to configure a Class of Service entry in the CoS settings table.
Syntax
set cos settings cos-index priority priority [tos-value tos-value] [irl-reference
irl-reference]
Parameters
Defaults
If no optional parameters are specified, none will be applied.
Mode
Switch command, read‐write.
Usage
The CoS settings table takes individual class of service features and displays them as belonging to
a CoS entry. Essentially, it is used for CoS feature assignment. Each class of service entry consists
of an index, 802.1p priority, an optional ToS value, and an IRL reference.
• CoS Index
Indexes are unique identifiers for each CoS setting. CoS indexes 0 through 7 are created by
default and mapped directly to 802.1p priority for backwards compatibility. These entries
cannot be removed, and 802.1p priority values cannot be changed. When CoS is enabled,
indexes are assigned. Up to 256 CoS indexes or entries can be configured.
• Priority
802.1p priority can be applied per CoS index. For each new CoS index created, the user has the
option to assign an 802.1p priority value 0 to 7 for the class of service. CoS indexes 0 through 7
map directly to 802.1p priorities and cannot be changed as they exist for backward
compatibility.
• ToS
This value can be set per class of service, but is not required. When a frame is assigned to a
class of service for which this value is configured, the ToS field of the incoming IP packet will
be overwritten to the user‐defined value. All but the last two bits of the ToS field are
rewritable. ToS can be set for CoS indexes 0 through 7.
• IRL Reference
The CoS IRL reference field is optional, as rate limits are not required. The IRL reference does
not assign an inbound rate limit but points to the CoS IRL Reference Mapping Table. This
reference may be thought of as the virtual rate limiter that will assign the physical rate limiter
defined by the IRL Reference Mapping Table, described in “
set cos reference ” on page 9‐27.
cos‐index Specifies a Class of Service entry. Valid values are 0 to 255.
priority priority Specifies an 802.1d priority value. Valid values are 0 to 7, with 0 being the
lowest priority. See Usage section below for more information.
tos‐value tos‐value (Optional) Specifies a Type of Service value.
irl‐reference
irl‐reference (Optional) Set the inbound rate limiter associated with this entry. Valid
values are 0 to 99. See Usage section below for more information.