RFC 2215 (rfc2215) - Page 2 of 16
General Characterization Parameters for Integrated Service Network Elements
Alternative Format: Original Text Document
RFC 2215 General Characterization Parameters September 1997
Parameters are assigned machine-oriented ID's using a method
described in [RFC 2216] and summarized here. These ID's may be used
within protocol messages (e.g., as described in [RFC 2210]) or
management interfaces to describe the parameter values present. Each
parameter ID is composed from two numerical fields, one identifying
the service associated with the parameter (the ), and
the other (the ) identifying the parameter itself.
Because the definitions of the parameters defined in this note are
common to all QoS control services, the values for
the parameters defined here are assigned from the "general
parameters" range (1 - 127).
NOTE: in the range 128 - 254 name parameters
with definitions specific to a particular QoS control service. In
contrast to the general parameters described here, it is necessary
to consider both the and to
determine the meaning of the parameter.
Service number 1 is reserved for use as described in Section 2 of
this note. Service numbers 2 through 254 will be allocated to
individual QoS control services. Currently, Guaranteed service
[RFC 2212] is allocated number 2, and Controlled-load service [RFC
2211] is allocated number 5.
In this note, the textual form
is used to write a service_number, parameter_number pair. The range
of possible of service_number and parameter_number values specified
in [RFC 2216] allow the parameter ID to directly form the tail
portion of a MIB object ID representing the parameter. This
simplifies the task of making parameter values available to network
management applications.
The definition of each parameter used to characterize a path through
the network describes two types of values; local and composed. A
Local value gives information about a single network element.
Composed values reflect the running composition of local values along
a path, specified by some composition rule. Each parameter
definition specifies the composition rule for that parameter. The
composition rule tells how to combine an incoming composed value
(from the already-traversed portion of the path) and the local value,
to give a new composed value which is passed to the next network
element in the path. Note that the composition may proceed either
Shenker & Wroclawski Standards Track