You are tasked to configure a router and enable one frame relay multipoint subinterface. You entered the command, but a Syslog error message appeared as shown.

How would you fix the problem?

replace the command with "interface s2/1.10 point-to-multipoint"

enter the command "encapsulation frame-relay" inside the physical interface config mode, then re-enter the previous command

enter the "encapsulation frame-relay" inside the physical interface configuration mode, then replace the command with "interface s2/1.10 point-to-multipoint"

enter the "no shutdown" inside the physical interface configuration mode, then replace the command with "interface s2/1.10 point-to-multipoint"

enter the "no shutdown" inside the physical interface configuration mode, then re-enter the previous command

Explanation

To configure a frame relay multipoint subinterface, you have to first enable the frame relay encapsulation inside the physical interface by issuing the command "encapsulation frame-relay". You can then create a multipoint/point-to-point subinterface. Note that you have to manually specify the subinterface type by appending the "multipoint" or "point-to-point" keyword to the "interface s2/1.10" command. (http://www.kaneezz.com/Ebooks/Cisco/Framerelayguide.pdf)