If multiple equal-cost paths exist for an IPv4 prefix, the Cisco IOS can load-balance labeled packets. If labeled packets are load-balanced, they can have the same outgoing labels, but they can also be different. The outgoing labels are the same if the two links are between a pair of routers and both links belong to the platform label space. If multiple next-hop LSRs exist, the outgoing label for each path is usually different, because the next-hop LSRs assign labels independently.
If a prefix is reachable via a mix of labeled and unlabeled (IP) paths, Cisco IOS does not consider the unlabeled paths for load-balancing labeled packets. (The load balancing is done only between labeled paths. This means that if an IP (unlabeled) and a labeled path have the same cost, only the labeled path is used to forward the packets.)
If these redundant paths are not equal costs, then MPLS is going to use the path that the IGP determined to be the shortest. MPLS itself makes no path selection. It depends on the IGP to determine that. So if you want to use a different path, you will have to change the IGP metrics so the IGP picks a different path, or use MPLS Traffic Engineering.
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
Introduction Basic configuration for netflow Scale parameters for
netflow Netflow support Architecture Packet flow for netflow Inside the
LC CPU Netflow Cache size, maintenance and memory Sample usage Cache
Size Aging Permanent cache Characteristics Which...