ABR MoFRR for Intra-AS

With ABR MoFRR in the intra-AS environment, the leaf chooses a local primary ABR and a backup ABR, with separate mLDP signaling toward these two ABRs. In addition, each path from a leaf to the primary ABR and from a leaf to the backup ABR supports IGP MoFRR. This behavior is similar to ASBR MoFRR in the inter-AS environment; for more details, see ASBR MoFRR. MoFRR is only supported for intra-AS option C, with or without RR.