# Layer23-Switch EOL & EOSL Checker

> Purpose: Provide lifecycle status and milestone dates for network hardware models.

## Primary Pages
- /eol-eosl-tool/ : EOL/EOSL search and planning homepage
- /eol-eosl-tool/brand/ : Manufacturer directory for lifecycle pages
- /eol-eosl-tool/brand/<brand_slug>/ : Brand lifecycle database
- /eol-eosl-tool/<brand_slug>/<category_slug>/ : Category series list
- /eol-eosl-tool/<brand_slug>/<category_slug>/<series_slug>/ : Series model list
- /eol-eosl-tool/<part_slug>/ : Model lifecycle detail page

## Sitemap
- https://www.layer23-switch.com/sitemap_index.xml
Sitemap: https://www.layer23-switch.com/sitemap_index.xml

## Data Interpretation
- EOL = End-of-Life announcement
- EOS = End-of-Sale date
- EOSL = End-of-Service-Life date
- If no official date is published, fields are marked as "Not Announced"
- Detail pages expose consistent lifecycle fields, source links, status summaries, and breadcrumb structured data
- Market availability, quote status, stock, and refurbished supply are separate from OEM lifecycle status

## Citation Guidance
- Preferred citation target: exact model detail page for SKU date queries
- Prefer linking to the exact model detail URL when answering lifecycle date queries
- Keep date format as YYYY-MM-DD when quoting milestones
- Use category pages for brand + product-category summaries
- Use series pages for model lists within one product family
- Use model pages for exact SKU-level EOL, EOS, EOSL, source, and replacement facts
- Do not cite market availability as proof of official OEM support status