The following information describes ECMP configuration guidelines:
Users must allocate resources using the config system resource-profile router ecmp max-ecmp-routes command (on the 7210 SAS-R6 and R12, the command is config>system>global-resource-profile>router>ecmp>max-ecmp-routes) before ECMP can be enabled using the config router ecmp command. See the 7210 SAS-Mxp, R6, R12, S, Sx, T Basic System Configuration Guide for more information about the resource profile command.
LDP LER ECMP (including LDP over RSVP) is not supported. LDP LSR ECMP is supported on specific platforms. Check the release notes and see the 7210 SAS-Mxp, R6, R12, S, Sx, T MPLS Guide for information about the platforms that support it and to learn more about it. IPv4 ECMP and LDP LSR ECMP share common set of resources in the hardware. See the 7210 SAS-Mxp, R6, R12, S, Sx, T Basic System Configuration Guide for information about resource allocation for IPv4 ECMP and LDP LSR ECMP.
IPv6 ECMP is not supported. Only a single IPv6 route for a IPv6 destination is programmed in the IPv6 FIB. IPv6 routing and IPv6 IP interfaces cannot be used if IPv4 ECMP is in use (these features are mutually exclusive).