The following Cisco IOS-XR configuration command will globally enable which multicast
process(es) on the router?
RP/0/RP0/CPU0:router(config)# multicast-routing
A.
IGMP only
B.
PIM only
C.
IGMP and MLD only
D.
PIM and IGMP only
E.
PIM and IGMP and MLD
Enters multicast routing configuration mode.
The following multicast processes are started: MRIB, MFWD, PIM, IGMP, and MLD.
For IPv4, IGMP version 3 is enabled by default; for IPv6, MLD version 1 is enabled by default.
http://www.cisco.com/c/en/us/td/docs/routers/xr12000/software/xr12k_r4-2/multicast/configuration/guide/b_mcast_cg42xr12k/b_mcast_cg42xr12k_chapter_00.html#con_1091781