Answer:
ip address 192.168.10.1 255.255.255.252
Step-by-step explanation:
Based on the scenario being described within the question it can be said that the additional command that should be issued would be "ip address 192.168.10.1 255.255.255.252 ". This is because an IP address needs to be assigned to the multi-link interface. Seeing since the physical serial interfaces are designed and programmed to have no IP address as well as encapsulation ppp, and clock rate commands.