Terms of use
Last updated 1 November 2026. By reading ccie13192.com you accept these terms.
The site
ccie13192.com is a personal professional site and a set of working notes written and maintained by Alex Xu, an individual based in Shanghai, China. It is not a company, a product or a service with a support contract.
Technical information is not advice
Everything on this site is general technical information. Network design depends on your topology, your vendor releases, your failure domains and your change control; a configuration that works in a lab can take a production network down. Verify every command against your own environment before you run it. I am not responsible for outages, data loss or damage resulting from applying anything published here.
What you may do with the writing
- Read it, print it, quote short excerpts with a link back to the article.
- Use it inside your own organisation for training or design work.
- Do not republish whole articles, translate them for publication, or feed them into a paid product without written permission.
Advertising
Pages carry Google AdSense advertising. Ads are selected by Google, not by me, and their presence is not an endorsement of the advertiser. About explains how the site is funded and what no advertiser can buy here.
External links
Links to standards documents, vendor documentation and third-party sites are provided for reference. I do not control those sites and am not responsible for their content or availability.
Availability and changes
The site is provided as it is and may change, move or be unavailable. Articles are corrected and sometimes rewritten; the correction policy is described on About. These terms may be updated, and the date at the top will show it.
Governing law
These terms are governed by the laws of the People's Republic of China. Nothing here limits rights you have under mandatory consumer law where you live.
Contact
Questions about these terms: alex.xu@ccie13192.com. See also the privacy policy.