# Doca Flow Action Descriptions

**URL:** <https://forums.developer.nvidia.com/t/doca-flow-action-descriptions/299091>\
**Category:** Infrastructure Management\
**Created:** [July 8, 2024, 10:06pm UTC](https://forums.developer.nvidia.com/t/doca-flow-action-descriptions/299091 "2024-07-08T22:06:55Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![francisco.wilken](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@francisco.wilken](https://forums.developer.nvidia.com/u/francisco.wilken)\
**Post date:** [July 8, 2024, 10:06pm UTC](https://forums.developer.nvidia.com/t/doca-flow-action-descriptions/299091/1 "2024-07-08T22:06:55Z")

</div>

Context: When modifying packets using actions in Doca Flow, one can use [Actions](https://docs.nvidia.com/doca/sdk/doca+flow/index.html#src-2591737680_id-.DOCAFlowv2.7.0-doca_flow_actions) or [Action Descriptions](https://docs.nvidia.com/doca/sdk/doca+flow/index.html#src-2591737680_id-.DOCAFlowv2.7.0-doca_flow_action_descs). Action descriptions have the benefit of being dynamic rather than decided at compile time, using strings “outer.ipv4.dst\_ip” instead of struct accesses. For this reason, I am trying to use Action Descriptions to add a predefined number to a packet field.

In this [table summary](https://docs.nvidia.com/doca/sdk/doca+flow/index.html#src-2591737680_id-.DOCAFlowv2.7.0-SummaryofActionTypesSummaryofActionTypes), what does “val” represent?  
Is it even possible to use action descriptions to add a number to a field rather than add two fields together?