Diameter Congestion and Filter Attributes
2015
This document defines optional Diameter attributes that can be used to
help manage networks that use Explicit Congestion Notification (ECN)
or Diameter traffic filters. These new attributes allow for improved
data traffic identification, support of ECN, and minimal Diameter
filter administration. RFC 5777 defines a Filter-Rule Attribute Value
Pair (AVP) that accommodates extensions for classification,
conditions, and actions. It, however, does not support traffic
identification for packets using Explicit Congestion Notification as
defined in RFC 3168 and does not provide specific actions when the
flow(s) described by the Filter-Rule are congested. Further, a
Filter-Rule can describe multiple flows but not the exact number of
flows. Flow count and other associated data (e.g., packets) are not
captured by accounting applications, leaving administrators without
useful information regarding the effectiveness or appropriateness of
the filter definition. The optional attributes defined in this
document are forward and backwards compatible with RFC 5777.
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