# IPv4 Routing - [How the routing table is built](https://ccie.nyquist.eu/ipv4/ipv4-routing/how-the-routing-table-is-built.md) - [How CEF works](https://ccie.nyquist.eu/ipv4/ipv4-routing/how-the-routing-table-is-built/how-cef-works.md) - [Routing Order of Operations](https://ccie.nyquist.eu/ipv4/ipv4-routing/how-the-routing-table-is-built/routing-order-of-operations.md) - [NSF – Non Stop Forwarding](https://ccie.nyquist.eu/ipv4/ipv4-routing/how-the-routing-table-is-built/nsf-non-stop-forwarding.md) - [RIP](https://ccie.nyquist.eu/ipv4/ipv4-routing/rip.md) - [RIP 101](https://ccie.nyquist.eu/ipv4/ipv4-routing/rip/rip-101.md) - [EIGRP](https://ccie.nyquist.eu/ipv4/ipv4-routing/eigrp.md) - [EIGRP 101](https://ccie.nyquist.eu/ipv4/ipv4-routing/eigrp/eigrp-101.md) - [EIGRP Metric](https://ccie.nyquist.eu/ipv4/ipv4-routing/eigrp/eigrp-metric.md) - [More EIGRP Features](https://ccie.nyquist.eu/ipv4/ipv4-routing/eigrp/more-eigrp-features.md) - [OSPF](https://ccie.nyquist.eu/ipv4/ipv4-routing/ospf.md) - [OSPF 101](https://ccie.nyquist.eu/ipv4/ipv4-routing/ospf/ospf-101.md) - [OSPF Areas](https://ccie.nyquist.eu/ipv4/ipv4-routing/ospf/ospf-areas.md) - [OSPF LSAs](https://ccie.nyquist.eu/ipv4/ipv4-routing/ospf/ospf-lsas.md) - [OSPF Mechanics](https://ccie.nyquist.eu/ipv4/ipv4-routing/ospf/ospf-mechanics.md) - [IS-IS](https://ccie.nyquist.eu/ipv4/ipv4-routing/is-is.md) - [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) - [BGP](https://ccie.nyquist.eu/ipv4/ipv4-routing/bgp.md) - [BGP 101](https://ccie.nyquist.eu/ipv4/ipv4-routing/bgp/bgp-101.md) - [BGP Attributes](https://ccie.nyquist.eu/ipv4/ipv4-routing/bgp/bgp-attributes.md) - [More BGP](https://ccie.nyquist.eu/ipv4/ipv4-routing/bgp/more-bgp.md) - [Route Redistribution](https://ccie.nyquist.eu/ipv4/ipv4-routing/route-redistribution.md) - [Policy based Routing](https://ccie.nyquist.eu/ipv4/ipv4-routing/policy-based-routing.md) - [PfR 101 – Perfromance Routing](https://ccie.nyquist.eu/ipv4/ipv4-routing/pfr-101-perfromance-routing.md) - [ODR](https://ccie.nyquist.eu/ipv4/ipv4-routing/odr.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://ccie.nyquist.eu/ipv4/ipv4-routing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.