VRPWS00-VRPWS72

Specifies the pacing window size for a certain virtual route and transmission priority. The virtual route must be defined within this path definition. You can change the pacing window size after initial activation of a path definition when the VR is deactivated or undefined.

The first number in the operand identifies the virtual route number; the second number identifies the transmission priority associated with the virtual route. For example, VRPWS02 = (128,255) defines a minimum virtual route window size of 128 and a maximum window size of 255 for VR0, transmission priority 2.

The minimum window size must be greater than zero and less than or equal to the maximum window size. The maximum window size must be greater than or equal to the minimum window size and less than or equal to 255. If either value is not valid, VRPWS is ignored.

VTAM® sends the minimum and the maximum values specified with this operand to the NCP. If this operand is not coded, no window sizes are sent, and NCP uses already defined values, if they exist. If the window sizes are not defined for a VR when the VR is activated, NCP dynamically calculates the value at the VR activation time.

The value (0,0) has special meaning. If this value is coded, the currently specified values in the NCP, if any, are nullified and values dynamically calculated at VR activation time are used.

For additional information on virtual route window sizes, see z/OS Communications Server: SNA Network Implementation Guide.