Execute the following command:
```bash
set interfaces ethernet eth1 vif 3
set interfaces bridge br1 member interface eth1.3
```
The following error was reported:
```bash
No type found for interface name: eth1
```
And in the actual running environment, DHCPv6 also reports errors, but due to configuration migration errors during upgrade, it cannot enter the normal routing working state, and there may be many errors, so I only repeat such errors in the virtual machine, please completely repeat whether it can run normally in such situation!