>>-+---------------------------------------------------+------->< '-VRPWS--nn--=--(--minimum_size--,--maximum_size--)-'
| statement: | PATH |
| dependencies: | none |
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.
Virtual route pacing window sizes are taken from the PATH definition statements in the node that activates the virtual route. For instance, you could define a virtual route pacing window size for a route, but if that route is activated by another node, such as an NCP, the pacing window size is taken from the NCP definition, whether a specified value or a default.
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.
- 15
- 255 minus 16n, where n is the number of explicit routes (defined or operative) that originate in the host and pass through, but do not end in, the adjacent subarea.
This increases the maximum window size for a route to a channel-attached NCP that has only a few explicit routes passing through it.
For additional information about virtual route window sizes, see z/OS Communications Server: SNA Network Implementation Guide.