> For the complete documentation index, see [llms.txt](https://ccie.nyquist.eu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ccie.nyquist.eu/ipv4/ipv4-routing/is-is.md).

# IS-IS

- [IS-IS 101](https://ccie.nyquist.eu/ipv4/ipv4-routing/is-is/is-is-101.md)
- [IS-IS Mechanics – CLNP](https://ccie.nyquist.eu/ipv4/ipv4-routing/is-is/is-is-mechanics-clnp.md)