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laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-upf/+/35667?usp=email )

Change subject: manual: explain GTP Echo workaround for tunmap ......................................................................

Patch Set 1: Code-Review-1

(1 comment)

Patchset:

PS1: I would remove the entire "tunend can be removed for forwarding-only" section. It's misleading. Everyone will always need to answert to GTP ECHO REQ in any spec-compliant deployment.

I'd argue the user is not interested in reading about a hypothetical scenario without echo-req/resp that never occurs in the real-world. They want to know what to do for a normal configuration.