In addition to node management using the IP addresses of VPRN interfaces, see Traffic leaking to GRT, management via a VPRN can also be achieved using IP addresses in the Base routing instance and GRT leaking.
When a management packet arrives on a VPRN, there is a lookup for the destination IP address of the packet. If the destination IP is resolved using VPRN and the corresponding protocol is enabled under VPRN management, then the packet is extracted to CPM.
If the destination IP address is not a VRF IP and GRT leaking is enabled, a second lookup is done in the GRT FIB. If the IP belongs to a local interface in GRT and allow-local-management is enabled under enable-grt, then the packet is extracted using GRT leaking to the CPM.