The NE80 functions as the core P device and a reflector on a carrier DCN. After the NE80 is upgraded to V300R005, no VPNv4 route exists and PE devices connected to the NE80 cannot receive routes reflected by the NE80. However, before the NE80 upgrade, the PE devices can receive the routes. Why do VPNv4 routes disappear after the NE80 upgrade?NE80 source version: V100R002B03D051SP02
1. Check whether the preceding scenario exists before the upgrade. If the preceding scenario exists, disable RT detection. Otherwise, services are affected.
2. If there are many reflectors, the problem may be shielded. After the link is disconnected or the device is upgrade, the problem may occur.