Invalid default setting for request/response chunking (sustain) on HTTP_Profile in v15.0+

[joelkeener]

Is your feature request related to a problem? Please describe.

15.0 has a new default value for the HTTP_Profile's requestChunking and responseChunking values: sustain. If you use either the older preserve or selective or values in your declaration, it will convert that to sustain if run on v15.0+ but if you use sustain as the value it will fail with this error: {"code":422,"errors":["/tenant/app/vs_http/requestChunking: should be equal to one of the allowed values ["selective","preserve","rechunk"]"],"declarationFullId":"","message":"declaration is invalid"}

Describe the solution you'd like

Will this work if you just add sustain as an option, and change it to the default value if run on <15.0?

Describe alternatives you've considered

The alternative is to not specify the default value, so that the resulting setting is sustain.

Additional context

The ACC sets the requestChunking and responseChunking values - even when they are default - so converting a v15.0+ config with an HTTP_Profile that has the default value for either key, will result in an invalid declaration.

[dstokesf5]

Based on your description, it sounds safe enough to remap preserve and selective to sustain on 15.0+. Do you have a suggestion on what to map sustain to for versions before 15.0?

[github-actions[bot]]

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.

[joelkeener]

Hello Daniel, sorry for not responding sooner. I suggest that you map the Request Chunking's sustain option to preserve, and the Response Chunking's sustain option to selective on pre-v15.0 versions of BIG-IP, since those are the default values, as is documented here: K40243113: Overview of the HTTP profile https://support.f5.com/csp/article/K40243113

[sunitharonan]

If you are still looking for this feature, please reach out to us at [email protected] in order to prioritize.

[github-actions[bot]]

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.