After upgrade NetEngine 20/20E from VRP version 3.30, Release 0521.04 to VRP version 5.30- NE20-VRP510-1243.01 and rebooting, all MPLS connections is down and MPLS service can't be run.
After upgrade engineer must config and run mpls service again.
[Quidway] interface <interface>
[Quidway-interface] mpls ldp enable
After upgrade from VRP version 3.30, Release 0521.04 to new VRP version 5.30- NE20-VRP510-1243.01, some MPLS configurations such as mpls ldp and mpls , mpls ldp will be lost or cut from comfiguration file by new software.
If you made upgrade from VRP version 3.10 to 5.10 and hiest, after upgrede you should carefully chek all configuration file.