This attribute specifies the peak-to-peak cell delay variation (CDV)
which is contributed to the entire ATM Interface for rt-VBR traffic.
The CDV is a measure of the delay jitter introduced mostly by
traffic buffering and cell scheduling. The worst case value of this
attribute can be computed as the txQueueLimit divided by the link
rate of this ATM Interface.
The value of this attribute is used by PNNI in the Resource
Availability Information Group (RAIG) topology updates and route
selection. It is also used by CAC at connection set-up time to
determine whether this ATM Interface can meet the CDV
requirement for that connection. If so, the value of this attribute is
added to the cumulative CDV field of the extended QoS information
element.