This feature is to permit rapid restoration of outbound traffic on ECMP groups that have a mix of ports from Supervisor1(Linecard1) and Supervisor2(Linecard2) cards. In the context of the supported platforms, these are referred to as Uplink ports and have names starting with Eth1/ or Ethernet1/ (Linecard1) and Eth2 or Ethernet2/ (Linecard2).

LDP Hello Redundancy uses the LDP Extended Discovery Mechanism to establish a redundant targeted Hello adjacency

The alternate LDP pseudowire feature enables users to configure an alternate pseudowire to the existing (primary) pseudowire for a given patch. Preference is initially given to the primary pseudowire.