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Subsequent Distribution of Routes

Routes that are imported from the global BGP non-VPN RIB (with a global import map) into a VRF RIB are never exported again. Because these routes are not exported to the global VPN RIB, they are not advertised to other PE routers. These imported routes are never exported to the VRF RIBs of overlapping VPNs.

Routes that are exported from a VRF RIB to the global BGP non-VPN RIB with the global export map are never imported back in to any VRF.

Routes that are imported from the global BGP VPN RIB (with an import map) into a VRF RIB are never exported again.

Routes that are exported from a VRF RIB to the global VPN RIB can be imported into the RIB of other VRFs. This behavior might be seen with overlapping VPNs.

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