Ensure that the Border Gateway Protocol (BGP) and the IP or Multiprotocol Label Switching (MPLS) network is up and running
at the customer site that is connected to the provider site by more than one path (multihomed).
Ensure that the backup or alternate path has a unique next hop that is not the same as the next hop of the best path.
BGP PIC Implementation Considerations
BVI as a core is not supported.
For labelled BGP loopback peering, the system supports only one primary and one backup path. No support for BGP PIC multipath
PIC EDGE is supported for all services, such as IPv4, IPv6, VPNv4, VPNv6, 6PE, 6VPE, VPWS, VPLS, and EVPN.over labelled unicast
Configures extra paths selection mode for a prefix.
Use the additional-paths selection command with an appropriate route-policy to calculate backup paths and to enable Prefix-Independent Convergence (PIC) functionality.
The route-policy configuration is a prerequisite for configuring the additional-paths selection mode for a prefix. This is
an example route-policy configuration to use with additional-selection command:
set path-selection backup 1 install