Border Gateway Protocol (BGP) nonstop routing (NSR) support at autonomous system boundary router (ASBR) in Inter-Autonomous
System (Inter-AS) Option B can be configured in the same way that BGP NSR is configured for Multiprotocol Internal BGP (MP-IBGP)
peers at the provider edge (PE). The configuration is performed in global router mode, on a per-neighbor basis. The NSR support
is applied to all address families under which the neighbor has been activated (provided the neighbor is not activated under
a nonsupported address family). If a neighbor is activated under an unsupported address family, that topology must be made
to be part of a different session using multisession.