Which of the following is a valid configuration statement for a route distinguisher?

A.
(config-vrf)#route-distinguisher 110:22

B.
(config-vrf)#rd 110.22

C.
(config-vrf)#rd 110:22

D.
(config-if)#rd 110.22

Explanation:

Note the colon (:) between 110 and 22.