Figure: MAP-T deployment scenario shows a MAP-T deployment scenario.
Figure: MAP-T deployment scenario
The routes related to MAP-T are:
IPv4 prefixes from the MAP-rules
These routes are advertised in the upstream direction.
DMR
This is the BR prefix for a specific domain. This route is advertised in the downstream direction.
Routes related to MAP-T are advertised through IPv4 and IPv6 routing protocols. MAP-T routes in the VSR are owned by ‟protocol nat” with a metric of 50. This can be used to configure an export routing policy when advertising MAP-T routes in IGP or BGP.
Multiple MAP-T domains can be supported in the same routing context.
Note: IPv6 IA-PD end-user prefixes are carved out of the IPv6 rule prefix. Aside from MAP-T, IA-PD
is used for native IPv6 end-to-end traffic outside of MAP-T. Although the IPv6 rule
prefix is not marked as a NAT route in the routing table, it is nonetheless advertised
in the upstream direction.