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
Explanation:
http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.5/multicast/configuration/guide/mc35mcst.
html
Multicast-routing Configuration Submode
When you issue the multicast-routing ipv4 or multicast-routing ipv6 command, all default
multicast components (PIM, IGMP, MLD, MFWD, and MRIB) are automatically started, and
the CLI prompt changes to “config-mcastipv4” or “config-mcast-ipv6”, indicating that you
have entered multicast-routing configuration submode