Document DSR overlay networks

[dvdksn]

Summary

Document the DSR option for Linux east-west overlay traffic and restore the legacy overlay tutorial redirect.

Closes #9652

Generated by Codex

[netlify]

✅ Deploy Preview for docsdocker ready!

Name	Link
🔨 Latest commit	5a90cf9
🔍 Latest deploy log	https://app.netlify.com/projects/docsdocker/deploys/6a5f46c04d30cb0008e69f69
😎 Deploy Preview	https://deploy-preview-25613--docsdocker.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[docker-agent]

Assessment: 🟢 APPROVE

The changes look good. The PR adds a well-structured DSR subsection to the overlay networking documentation and restores a missing redirect alias.

• ****: The new entry () correctly restores the legacy overlay tutorial redirect. No issues.
• ****: The new "Use direct server return" subsection is accurate and clear. The --opt dsr bare-key syntax is consistent with Docker's established convention for boolean network options (same pattern as --opt encrypted). The NOTE callout correctly uses the supported > [!NOTE] syntax and flags the Linux-only constraint.

[docker-agent]

Assessment: 🟢 APPROVE

The PR adds a DSR (Direct Server Return) section to the swarm networking guide and restores a missing legacy redirect alias.

Redirect alias: The alias is correctly added to front matter — no redirect gap.

New DSR section: The bare-flag syntax is consistent with the existing pattern used elsewhere in overlay network documentation. The new content is concise, accurate, and follows the project's code-example pattern (state → show → explain + note). No AI-isms or style violations found.

[docker-agent]

Assessment: 🟢 APPROVE

The PR adds a concise "Use direct server return" subsection to networking.md and restores a missing redirect alias in overlay.md. Both changes are well-scoped and accurate.

What was checked:

• --opt dsr bare-flag syntax — mirrors the established --opt encrypted pattern in the same file; not a bug
• Redirect alias /network/network-tutorial-overlay/ added to overlay.md front matter — correct, no missing redirects
• Style guide compliance (AI-isms, hedge words, bold usage, list formatting) — clean
• Markdown formatting — no issues
• Content accuracy — DSR description (MAC rewrite, unchanged source/VIP) is technically accurate
• NOTE callout about Linux-only + ingress exclusion — appropriate and correctly formatted

No issues found in the changed code.