How to make Networkmanager include Source Link-Layer address in Router Solicitation

Hello there,

My router won’t response to Router Solicitation with Router Advertisement if the Router Solicitation doesn’t include Source Link-Layer Address and thus the device can’t configure IPv6 with SLAAC just in time. And the router also doesn’t provide a setting to set the time period for Router Advertisement multicast, so currently, the only way is to wait for the router send out multicast Router Advertisement.

How can I make Networkmanager include Source-Link Layer address(Mac address) in RS packet?

I search the web and can’t find an answer.