trill-5----Page:10
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18 

CFT, CFT-IRT and How Many Trees?
Do we use a per-ingress IRT (Ingress RBridge Tree), using SPF routing (similar to unicast), or some subset of this in the form of multiple spanning trees?
Applies only to non-unicast and flooded traffic forwarding.
Apparently driven – in part – by the need to distribute traffic across multiple paths.
PPT Version