Configuring the Service Label Mode

To change the service label mode of the VPRN for the 7750 SR, the config>service>vprn>label-mode {vrf | next-hop} command is used:

The default mode (if the command is not present in the VPRN configuration) is vrf meaning distribution of one service label for all routes of the VPRN. When a VPRN X is configured with the label-mode next-hop command the service label that it distributes with an IPv4 or IPv6 route that it exports depends on the type of route as summarized in Table 1.

Table 1. Service Labels Distributed in Service Label per Next-Hop Mode
Route Type	Distributed Service Label
remote route with IP A (associated with a SAP) as resolved next-hop	platform-wide unique label allocated to next-hop A
remote route with IP B (associated with a spoke SDP) as resolved next-hop	platform-wide unique label allocated to next-hop B
local route	platform-wide unique label allocated to VPRN X
aggregate route	platform-wide unique label allocated to VPRN X
ECMP route	platform-wide unique label allocated to next-hop A (the lowest next-hop address in the ECMP set)
BGP route with a backup next-hop (BGP FRR)	platform-wide unique label allocated to next-hop A (the lowest next-hop address of the primary next-hops)

A change to the label-mode of a VPRN requires the VPRN to first be shutdown.