SAF and Split-Horizon Configuration Example
This configuration example demonstrates how to disable split-horizon on an interface for SAF.
Commonly Asked Question
Q: What is split-horizon, when should I disable split-horizon and where should it be configured when using SAF?
A: Similar to EIGRP, split-horizon is used by SAF to prevent service advertisement loops. Split-horizon is enabled by default on all links when SAF is configured. When using remote static neighbors across a non-SAF network in a hub-and-spoke topology, generally all remote neighbors will be configured with a single Loopback interface as their source. This results in the Loopback interface behaving as a multipoint link on the hub router.
Disable split-horizon on multipoint links on the hub router when SAF advertisements need to be advertised between spoke routers.
Related show Commands
sh eigrp service-family ipv4 int detail