The router supports the MPLS entropy label, as specified in RFC 6790, on IS-IS segment-routed tunnels. LSR nodes in a network can load-balance labeled packets in a more granular way than by hashing on the standard label stack. See the MPLS Guide for more information.
Announcing of Entropy Label Capability (ELC) is supported, however processing of ELC signaling is not supported for IS-IS segment-routed tunnels. Instead, ELC is configured at the head-end LER using the configure router isis entropy-label override-tunnel-elc command. This command causes the router to ignore any advertisements for ELC that may or may not be received from the network, and instead to assume that the whole domain supports entropy labels.