After the version upgrades from V2R1 to V2R3, the service of eight E1 binding is unreachable. Check the interface and it is found that LCP of serial is not up.
Under controller E1XX view use restart or shut down, undo shutdown command to activate E1 port again. Change link layer of interface serial XX and it is up. MP-group interface is up and the service recovers.
1. After the version upgrades, the command changes.
2. E1 port need activation again.
1. There is change when configuring command from V2R1 to V2R3. For Mp-group service of E1, change Mp-group 2 as Mp-group 0/0/2.
2. For E1 binding service, reset physical interface of E1 and it can be restarted.