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Assure to start one kind of multicast protocol on the interface
Assure the time of the timers of each router on the same network segment is
consistent; usually we recommend the default setting.
Unicast route shall be used to carry out RPF examination for multicast protocol. So
the correctness of unicast route shall be guaranteed above all.
If all attempts fail to solve the problems on MLD, please use debug commands such as
debug ipv6 MLD event/packet, and copy DEBUG information in 3 minutes and send to
Technology Service Center.
17.3.5.1 Commands for Monitor And Debug
17.3.5.1.1 debug ipv6 mld events
Command: debug ipv6 mld events
no debug ipv6 mld events
Function:
Enable the debug switch that displays MLD events. the
“no debug ipv6 mld
events
” command
disables the debug switch.
Parameter:
None
Default:
Disabled
Command Mode:
Admin Mode
Usage Guide:
This switch can be enabled to get MLD events information
Example:
Switch# debug ipv6 mld events
Switch#1970/01/01 07:30:13 IMI: MLD Report recv: src fe80::203:fff:fe12:3457 for
ff1e::1:3
1970/01/01 07:30:13 IMI: Processing Report comes from Vlan1, ifindex 2003
1970/01/01 07:30:13 IMI: MLD(Querier) ff1e::1:3 (Vlan1): No Listeners --> Listeners
Present
17.3.5.1.2 debug ipv6 mld packet
Command: debug ipv6 mld packet
no debug ipv6 mld packet
Function:
Enable the debug switch that displays MLD packets.The
“no debug ipv6
mld events
” command
disables the debug switch.
Parameter:
None
Default:
Disabled
Command Mode:
Admin Mode
Usage Guide:
This switch can be enabled to get MLD packets information.
Example:
Switch# deb ipv6 mld packet