NetworkManager vlan网卡反复掉

[舞蹈的熊熊]

请教各位大神，怎么配置NetworkManager可以让vlan 虚拟网卡一直保持激活的状态，保持vlan网卡不要反复掉。

给网卡eth0配置了vlan2，vlan2配置了DHCP，实际上因为组网问题vlan 2 DHCP一时半会儿拿不到IP地址，然后vlan2网卡就一直反复掉。
等vlan2通了理论上能DHCP拿到地址之后，linux系统上因为vlan 2网卡已经掉了，就再也拿不DHCP地址了。
vlan 2网卡掉的时候报错说是：
device (eth0.2): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
[1730973927.9609] device (eth0.2): Activation: failed for connection 'netplan-eth0.2'
[1730973927.9544] device (eth0.2): state change: activated -> failed (reason 'ip-config-unavailable', sys-iface-state: 'managed')