Junos OS support the IS-IS flood reflector feature that offers better scalability for a Level 2 topology. Flood reflectors enable the creation of topologies where Level 1 areas provide transit forwarding for Level 2 destinations within a Level 2 topology.
The flexible tunnel interfaces (FTI) are designated as flood-reflector interfaces. To enable the flood reflector on an FTI, include the flood-reflector statement at the [edit protocols isis interface interface name level level number hierarchy level.
You can configure the interface to be either the reflector or the client. To enable the reflector, you can use the flood-reflector reflector cluster-id statement at the [edit protocols isis level level number] hierarchy level.
To enable the flood reflector client, include the flood-reflector client statement at the [edit protocols isis level level number hierarchy level.
